Ecc85 Preamp

TungSol 12AX7 handles everything from vintage rock to a clean tone sound. Construction with single O-getter and gray plates. Dimensions. So the MiniAmp started as a AX84 FireFly without the cascode boost-stage with one 12AX7 in the preamp and a 12AU7 in the poweramp in a self-split push-pull configuration. The 5692 is a commercial "premium" version of the type 6SN7 tube. The ECC85 costs a lot more than the PCC88. Until the JJ EL844 came on the scene in 2011 there really were no substitute tubes for EL84 / 6BQ5 tubes. Daddario XT 80/20 Bronze. It would seem there a preamp section with tubes used in the pre-amp stages are 2x EF86 , 1x ECC85 and 1xecc83. The Lorenz ECC83s sound very nice, too. 6AQ8 ECC85 Philips Tested Balanced HiFi Amp Preamp Stereo Ham Radio Vacuum Tube. High End preamplifier with ECC88 or ECC82! Home. 6CA4 (also EZ81) Rectifier Vacuum. The original name for this circuit is a Balanced. If you own a tube amp, there is a good chance it has one or more 12Ax7 tubes running the preamp section. Twin triode preamplifier tube. Dynaco Mullard 6AQ8 ECC85 Vacuum Tube NICE Bogey + Very Strong Balanced The measurements provided were made on a Triplett 3444 that has been modified to test tubes in accordance with the original manufacturer’s stated test conditions, including bogey values. It has a center-tapped heater filament so it can be used in either 6. The nature of high fidelity in studios makes it perfectly suited for audio playback in the home. I has EAG eb031 schematics - v72-style preamp from East Europe - It uses common EF86 in the first stage plus ECC85 - rather unusual choice. Pretty much everything in the preamp is standard tube amplifier construction. MM phono stage Only (NO MC stage). Fearn VT-2 Tube Preamp. From the sonical point of view it is much more important that the RIAA equalization is correct at 100Hz and 10kHz where about 13. Köykkä knew his tubes. Joined: Jun 9, 2011 (in a vox hw in this instance, but all experiences are welcome) You'll be able to turn the preamp volume up a few more notches but still be at the same loudness. The others are all NOS types. Thanks to its design it also peforms with very low noise and microphonics. The ECC85s were made by Röhrenwerk Neuhaus, Germany - probably in the 70's. Vaccum Tubes: Valve Radio: Policy Center. If you want the best 6AQ8 / ECC85 in the world, this is your chance to get a pair! These are Philips ECC85 from Holland Tested on our B+K tube tester. 2 X ECC85 6AQ8 Valvo Hamburg TU1 Philips Holland Tested. 6DJ8 / ECC88 SRPP Tube Preamplifier Schematic. The 12AU7 (ECC82) is a Twin Triode vacuum tube, it is very popular in the audio world because it is rather rugged and can be operated at lower voltages. 1 low noise pair) JAN-12AT7WC Raytheon Kuhl-Tube cryo NOS black plates triple mica "O" getter 1975 1 tube) 8. It has two identical triodes both of which have a high voltage gain. Now We Need a Preamplifier. We find this incorrectly! [/size] [size=x-small] Unfortunately will the notion "equivalent" not be interpreted the same by everybody. Don't trust it when a sellers offers those repeatedly for low prices. Made in Hungary. MM phono stage Only (NO MC stage). The tubes that came with it were all Chinese tubes, and although decent sounding enough, the tonal balance was skewed towards the higher frequencies, and the sound stage had shrunk considerably compared to the Rogue that had been in my system for the past 3 years. ANSAR Supersound Polypropylene Axial Audio Capacitor Tolerance 5% 100nF 450V. Today, when a tube preamp is used, it is mostly for audio purposes ("tube sound") and the info below refers. (2) 6dg8 & (2)ECC85. The 100 Watt mono is a Tim de Paravicini design classic that has been in continual production for over 30 years. Preamp để cải thiện bộ khuếch đại, bóng đèn 6H1 có thể thay thế loại ECC85 của Mỹ hoặc Châu âu. Tube preamp Marantz 7c, kit, made in Belgrade, Srbija, IkaP Acoustic & Comps! -Circuit design based on classic Marantz 7c preamp. How to choose? Originally Posted by gibson175 at7. There aren't any in current production and with most of them being of European origin, they are getting expensive. Over the past several months, I have been working on a new 2015 Musica Bella LeAnna preamp circuit. Description. 6dj8 6922 e88cc 6h30pi 6n23p ecc99. The owner told me that the socket next to the power tube is the phase inverter and you should use a 12AT7. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. It is a great all-rounder. The 12AT7 is used in many hi-fi applications, as each triode operates as a class A amplifier. This is one of many possible variations for a Symmetrical SRPP Preamplifier based around the 6DJ8 / ECC88 family of tubes. beachtet werden. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today. In most tube preamps/amps today, you can substitute any of the tubes in this family for one another. 99% of valve amplifier manufacturers use ECC83 (12AX7) as the first preamplifier valve so if it's good enough for them …. It is based around 12AU7 / ECC82 audiophile vacuum tube that provides warm, rich and smooth sound expected from audiophile amplifiers. We accept payments by: Average delivery time to United States is 16 days. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. Year: Type Graetz + ITT: Ref. with 6AQ8 and Mullard EL 84 using very beautiful sound you can get and instead of ECC85(6AQ8) can be use 6DT8. The preamp valve complement is an ECC832, ECC83, and ECC81 with respective typical current draws of 20 mA, 2. One day, in the middle of work time, a colleague entered my office to ask something and from the corner of my eye I glimpsed a man who was staring like hypnotized into an amplifier. Well-priced lot!. Does anyone have any recommendations for budget bookshelf speakers to pair with the Fatman iTube. We had just run out of this tube not to long ago, and it was looking grim for all our customers who are big fans of them but happy days are here again! I just found a nice whack of. This ECC85 is a double triode for the front end stages of FM radio receivers. Sau khi tr ải nhiệm , nhi ều khách hàng đánh giá là t ầ n s ố th ấ p r ất tốt, độc căng và lực lặn sâu được cải thiện rõ ràng , âm thanh m ề m và tròn, bóng đèn s ử. Stromberg Preamp Official Site. 4mA, and 11. 1977 год выпуска ЛОМО. 01 6 6 1969. The standard 6N1P input tubes can be subbed out for any 6DJ8/6922/ECC88/ECC85. ECC85 TUBE PDF - Find great deals on eBay for Telefunken ECC85 in Vintage Tubes and Tubes Sockets. I don't know which tube is a 12AT7 though. ECC82, ECC802, E80CC*, B749, CV491, CV4003, 5814, 5963, 6189, 6350, 6680, 7316, 7730, 12bh7*, 6fq7** , 6gu7**, 6cg7**,  6dj8**, 6AQ8**. ECC85 / 6AQ8 RFT tube – PREAMP / DRIVER tubes – Collection of Oskar Elm D. Featured Videos. Emco 3160-09. Tung-Sol 12AX7 delivers good gain, but without washing out the fine details and textures. Tungsram ECC85 6AQ8 NOS audio tube - Chinese 6N1 tube replacement $31. Find many great new & used options and get the best deals for Mullard ECC85- Vintage Tube at the best online prices at eBay! Free delivery for many products!. Полный комплект с оригинальными светильниками. The 6N23P/ECC88s were made in Russia by Voskhod in the 70's and early 80's, and are marked with the original Russian code. View Product #2 Dilvpoetry TUBE-01 Preamp 6J1 Vacuum Tube Amplifier Buffer Mini HiFi Preamplifier DC12V2A (Silver). One triode would be used as an RF amplifier and the other as the local oscillator. t = Triode Unit. Electronic Circuit Collection. The first notable contribution of Milliard design engineers to the specialist world of high-quality sound reproduction was the now- famous 'Five-Ten' amplifier circuit which was introduced in the summer of 1954. Similar tubes: 6T26 (normally exchangeable, small. Welcome to Portugalradios Tube are in perfect physical condition It has been carefully tested, and is guaranteed to be in good condition, no shorts or leaks. Indeed, it can work very well in a hybrid circuit. It sounds absolutely fantastic, and will make give any sound system that warm tube sound that is so sought after by audiophiles. EL84 and EL34 were his basic tools, and the ever useful ECC81 and ECC85 were his favorite front stage components in the 1950s. The effect is called Partition noise and makes the Pentode noisier than a Triode. 01 7 FP 1999. Power amplifier 807/ EL34/ KT88/ EL156/ FU19/ FU25/ FU50/ Power amplifier 6P1/ 6P3P/ 6P6P/ 6P9P: Output Transformer: Power Tran / Choke coil. reliability is important for the PI. Lot of 117 Vintage Tubes TV Radio Preamplifier RCA Sylvania CBS Zenith GE (D)Brands and Types include:Sylvania 6AQ8 / ECC85Sylvania 6EV5Sylvania 6BZ6Sylvania 6AW8ARCA 6SJ7RCA 8FQ71RCA 6AB4RCA 5B14ATung Sol 6BJ6Mullard EF94 / 6AU6Mullard 6BM8Motorola 7056National Tube 6922Phil. DIY phono preamp with Tungsram tubes 6x4 rectifier, ECC85 (1962), ECC85 (1957) and MM electrolytic capacitors (1968). Amperix 6dg8 tubes probably worth $250 pair. vacuum tube 6H1n = 6N1, ECC85, 6N11, E88CC 6922 Russia made NOS QINPU S-2 hifi speakers loudspeakers pair 2011 latest Red Qinpu A3 Integrated Amplifier with headphone amp tube 6N3 hifi audio. A tube preamp is a unit that preamplifies a weak signal into a level of higher voltage and/or current, and where any overdrive/distortion occurs or is accomplished with one or more vacuum tubes. Daddario XT 80/20 Bronze. 01 5 5 1969. Superb workman. Basic data: Uf = 6. Jul 1, 2011 #7. A small selection of ECC85 and ECC88 preamp tubes. pdf (117208 bytes) (de) ECC85 (= B719) Marconi tt. 12AX7 Family Tube Substitution. But if IIRC, the 6N1 and ECC88 aren't all that close spec wise whereas the ECC85/6AQ8 is almost identical. As well it offered more gain. The 6N23P/ECC88s were made in Russia by Voskhod in the 70's and early 80's, and are marked with the original Russian code. 6AQ8 (also ECC85) Preamp Vacuum Tube. Keep the power and signal wires separated. All tubes are fully. Demonstration and tear down of this little vacuum tune preamp. Make Offer - 6AQ8 ECC85 Philips Tested Balanced HiFi Amp Preamp Stereo Ham Radio Vacuum Tube. I placed my unit between my preamp and my two power amps (MF A100, and Perreaux 2150B), and its outputs drive the two amps directly. Cathode Follower Calculator Basic Theory - using 21st-Century technology to design vacuum tube preamps, power amps, and power supplies System Design - a professional methodology for crafting a complete guitar amplifier. Tungsram 12AX7/ECC83- When I think of this tube, I think of turning up the color much in the same way the classic Mullards do smooth, maintains top end, excellent bass. ECC85+EL84+6E2main amplifying circuit. What is the Difference Between the 12AX7, 12AT7, and 12AU7 Preamp Tubes? Let's take a look at the less glamorous, but certainly important type of amplifier tube - the preamp tube. The mu-follower will clip hard when overdriven, producing a rich spectrum of both odd and even harmonics. ECC83 / 12AX7 / 7025 / 5751 Dual Triode The ECC83 or 12AX7 is a miniature 9-pin high gain (100mu) dual triode tube. A nicely matched set of Telefunken ECC85 (6AQ8). For his RIAA-stages he chose EF86 and later ECC808, a post-manufacture version of ECC83, quite a rarity today. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. But with an instrument amp (ie that may get pushed hard / overdriven), without wishing to over complicate things, it would be good practice to add screen grid resistors. The others are all NOS types. What is the Difference Between the 12AX7, 12AT7, and 12AU7 Preamp Tubes? Let's take a look at the less glamorous, but certainly important type of amplifier tube - the preamp tube. This tube was first developed and produced by RCA. Tubes, tubes, tubes! Find everything from the field of tubes: premium selected TAD tubes, TAD blackplate tubes, our beloved tubesets for nearly every amplifier out there, more brands and accessories. Stereo and mono, octal and 9-pin printed circuit boards available. The components also include coupling capacitor,ALPS Potentiometer,Hitachi oxygen-free copper wire and audio silicon of single orientation. 93 (2 new offers) Tube Amp Doctor ECC83WA / 12AX7 Premium Selected Vacuum Tube. ECC85, RFT, Double Triode, tube, vacuum tube, tube amp, ECC 85 | 3D CAD Model Library | GrabCAD. It's sounding is great and is especially good for guitar amplifiers because of its rugged construction. If you pre-adjust the volume of the amp with the power soak, then it should work to use the DI OUT for both. Notify me of updates to ECC85 / 6AQ8 RFT tube: Site news: 22 May 2020 » Vacuum tubes by use » PREAMP / DRIVER tubes » ECC85 / 6AQ8 RFT tube: ECC85 / 6AQ8 RFT. It has a center-tapped heater filament so it can be used in either 6. The 7025 valve is a low hum and low noise version of the ECC83, but whether you’ll hear the difference is debatable. New Free PCB Design Software July(1) LM317 Constant Current Calculator, Tool March(1) LME49811 + THERMALTRAK AMPLIFIER AND SERVO CONTROL - PART 1 2013 (22) April(6). 2020 popular fever tube, 6p1, diy tube, 6z4 tube trends in Consumer Electronics, Amplifier, Speaker Accessories, Home Improvement with 6n1 Tube and fever tube, 6p1, diy tube, 6z4 tube. RFT (49) Tungsram (24) RCA (21) Siemens (19) Mullard (16) Condition see all Condition. It has a 4Ω output to match its 2x12" 4Ω cabinet. I has EAG eb031 schematics - v72-style preamp from East Europe - It uses common EF86 in the first stage plus ECC85 - rather unusual choice. ECC88 Preamplifier / buffer June(1) Thorens Power Supply Upgrade TD-150, TD-160 April(1) 50Hz Strobe Light. Tubes: 66: 666Q Stereo: 2p: ECC85, AF137/20, ECH81, EAF801, ECC83, 2*ELL80, EMM803: 54/55: Amigo 55 >> Amigo 3, 1953 : 54/55: Amigo 55U - 9006 = Lo. Preamp outs let you connect your powered monitors directly to Valhalla 2, to give them some of what some people call "tube magic. Telefunken NOS 6AQ8/ECC85 high-mu radio frequency double triodes intended for use as R. The most frauded tubes there are ECC803S and ECC88, because thes are practically unavailable as NOS tubes. The ECC85s were made by Röhrenwerk Neuhaus, Germany - probably in the 70's. After researching the parts (transformers etc. ECC85+EL84+6E2main amplifying circuit. Tubes, tubes, tubes! Find everything from the field of tubes: premium selected TAD tubes, TAD blackplate tubes, our beloved tubesets for nearly every amplifier out there, more brands and accessories. 5692 RCA Red Base New: RCA brand-red base. would it amplify the sound without distortion? ( in some cases preamplifier acts more like de-amplifier (lowers the signal) when things are not 'balanced' ) EDIT: I've got an idea. AS INTERMITENCIAS DA MORTE SARAMAGO PDF. DOUBLE TRIODE ECC83S is 12AX7 high gain pre-amplifying double triode. 00 Buy Now ECC83/ 7025-HARMA DR250 Harma Valves The Harma 7025 STR DR250 is a close sounding recreation of the famous USA made 7025 valve. BASCOM-AVR Project 2014 (3) September(1) Multisim Blue. These fantastic RFT Germany ECC85 / 6AQ8 tubes have a great warm sound and are a great affordable NOS tube. In most tube preamps/amps today, you can substitute any of the tubes in this family for one another. This is simple to build audiophile class-A tube headphone amplifier. B7G 7 pin Valve / Tube. The 6DJ8 is a dual triode preamp tube. The complete schematic is available for download HERE. Messages: 4,342. A total of 7 tubes, 11 diodes, 19 transistors and 4 selenium and silicon rectifiers are used through the radio. Hi can i use a ECC82 tube in a ECC83 preamp ? The ECC82 can handle higher voltages as a ECC83. The valve produces a gain reduction of between 15 to 30 % when compared In stock £10. In most tube preamps/amps today, you can substitute any of the tubes in this family for one another. A small selection of ECC85 and ECC88 preamp tubes. tube hi-fi amplifier with preamplifier (ecc82 - ecc85 and 6p36s or el504) Jan Tube amps + accessories Electronic Schematics Electronic Circuit Valve Amplifier Audio Amplifier Diy Electronics Electronics Projects Adding Fractions Magnetic Tape Smart Home Automation. I have many other types of tubes. One of the ECC88 types is new production from JJ, Slovakia. Make Offer - 6AQ8 ECC85 Philips Tested Balanced HiFi Amp Preamp Stereo Ham Radio Vacuum Tube. Allgemeine Vorgaben wie Heizung und Anodenstrom, Anodenspannung und Anodenverlustleistung je. Buy only from reliable sources!. There are different adapters for power tubes and for preamps. Best 12AX7 For Guitar and Bass Amps TungSol 12AX7. На продажу очень редкий 2-канальный советской трубки микрофонный предусилитель - ЛОМО UP-27. Hope this helps! 🙂. One of the ECC88 types is new production from JJ, Slovakia. Like Reply. For more information on these vacuum tubes including pinouts, ratings, application and possible substitutions visit ECC85 in Radio Museum and 6AQ8 / ECC85 in Duncan Amps. Or: Common and fairly inexpensive wonderful sounding vintage audio tubes for your unmodified McIntosh, Dynaco, Marantz, Fisher, Scott, etc. 57 kB, 1195x649 - viewed 38 times. Description. 6AQ8 ECC85 Philips Tested Balanced HiFi Amp Preamp Stereo Ham Radio Vacuum Tube. 6AQ8 (also ECC85) Preamp Vacuum Tube. ECC85 TUBE PDF - Find great deals on eBay for Telefunken ECC85 in Vintage Tubes and Tubes Sockets. 2017 - tube hi-fi amplifier with preamplifier (ecc82 - ecc85 and 6p36s or el504) Zostaňte v bezpečí a zdraví. Measurement on pin 6 of ECC85 gave zero voltage there, and no Local Oscillator was noticable on a nearby radio. Today, it is by far the most common preamp tube used for electric guitar amplification and there is an almost overwhelming supply of current production options to choose from. Output signal is taken from the cathode of ECC85. 6C45Pi Gold Pin. (1) ECC85/6AQ8 Telefunken diamond bottom, a rare excellent quality German made NOS tube with matched and balanced sections. Don't trust it when a sellers offers those repeatedly for low prices. We accept payments by: Average delivery time to United States is 16 days. Demonstration and tear down of this little vacuum tune preamp. A tube preamp is a unit that preamplifies a weak signal into a level of higher voltage and/or current, and where any overdrive/distortion occurs or is accomplished with one or more vacuum tubes. The 12AX7 is a high-gain (typical amplification factor 100), low-plate-current triode best suited for low-level audio voltage amplification. Its design led me to investigate the physics behind a low-noise tube. The midrange especially is fabulous. This may help you keep a fine amp or preamp running when the exact Russian or Chinese tubes cannot be found. They normally have steel pins. Cheap Amplifier, Buy Quality Consumer Electronics Directly from China Suppliers:new 6N1 x 3 Tube Tone Board Preamplifier Classic Circuit Tube hifi Preamplifier Preamp Board Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. I also found that the 6DJ8 had better linearity (lower distortion), wider bandwidth, and better ability to drive the output jack with a strong low-impedance signal, which is. Perhaps the screening then is not so good, The EF89 replaces the EF80 and EF85 for RF & IF work, the EF86 is a low noise part for Audio Preamps. That's a bit much and so it would be a good idea to use an amplifier outside the feedback loop to bring up the input. (I said most, not all) To be safe, you should always consult the manufacturer and/or other users of the same amp/preamp to make sure that it is OK. ECC802S (12AU7 / ECC82) Tube SRPP Preamp Build Details. Output signal is taken from the cathode of ECC85. EL84 and EL34 were his basic tools, and the ever useful ECC81 and ECC85 were his favorite front stage components in the 1950s. 00 Buy Now ECC83/ 7025-HARMA DR250 Harma Valves The Harma 7025 STR DR250 is a close sounding recreation of the famous USA made 7025 valve. DM70, DM71, EAM86 and UM80 (similar EM80, but with 19V 100mA filament voltage). Hi can i use a ECC82 tube in a ECC83 preamp ? The ECC82 can handle higher voltages as a ECC83. The tube I am planning to use is ECC85 (very similar to 12AT7). Tubes are ECC85, ECH81, EF89, EAF801, ECF80, EM87 and ZA1004. The passive pre-amp can be used between your audio source (CD, PC, Turntable etc. This receiver can be regarded as a QRP (low power) because the regenerative stage uses some microwatts in order to work. Condition: Opened - never used Tung Sol 12AX7TS Preamp Tube TUNG-SOL 12AX7 / ECC83. 12AX7 (also known as ECC83) is a vacuum tube that is a miniature dual triode - 6AV6 with high voltage gain. There are no cons. The original name for this circuit is a Balanced. reliability is important for the PI. They just sound. ECC85 Double Triode. 3V/435mA, ECC88 is 6. 6922 / E88CC is a "premium grade" version of the 6DJ8. hp = Heptode Unit. Specifications. (2) 6dg8 & (2)ECC85. 00 /ea: Add quantity: Available quantity: more 50 pc. A small selection of ECC85 and ECC88 preamp tubes. Lot of 117 Vintage Tubes TV Radio Preamplifier RCA Sylvania CBS Zenith GE (D)Brands and Types include:Sylvania 6AQ8 / ECC85Sylvania 6EV5Sylvania 6BZ6Sylvania 6AW8ARCA 6SJ7RCA 8FQ71RCA 6AB4RCA 5B14ATung Sol 6BJ6Mullard EF94 / 6AU6Mullard 6BM8Motorola 7056National Tube 6922Phil. 01 3 3 1969. MULLARD 12AX7/ECC83 AUSTRALIAN MADE 12ax7/ecc83 tested high quality used as new, test strong, quality tubes. Preamp tube adaptors for your Maxi-Test Digital Tube Testers. Electronic Circuit Collection. Price is for 8 tubes in seemingly NOS condition. The 12Ax7 tube is by far the most popular preamp tube used in guitar amplifiers. Daddario XT 80/20 Bronze. The Lorenz ECC83s sound very nice, too. An ECC81, for example, will have similar mu and gm, but has better linearity in voltage amplifiers and is readily available (still in production). Tube Preamplifier Circuit 6DJ8 / ECC88 SRPP This is one of abounding accessible variations for a Symmetrical SRPP Preamplifier based about the 6DJ8 / ECC88 ancestors of tubes. Audio Note M-7 preamplifier schematic in PDF DOWNLOAD Themify Builder Audio Addon; Easy Italian Audio Course For Beginners Set, Vol 1, 2, & 3 CordellAudio. EI ECC85 € 12,30 (including 21 % tax) Ask a question about this product. Volume is identical, just better sound. Wire vintage 1930s - 1960s Shielded for Interconnects, Preamps, Amps, Mics A nicely matched set of Telefunken ECC85 (6AQ8). Best 12AX7 For Guitar and Bass Amps TungSol 12AX7. If you're surfing through cheap deals on tube power amplifiers UK, uk. An unusual feature of the 8L6 is that it can be used as an integratedamplifier or as separate preamplifier and power amplifier. Sau khi tr ải nhiệm , nhi ều khách hàng đánh giá là t ầ n s ố th ấ p r ất tốt, độc căng và lực lặn sâu được cải thiện rõ ràng , âm thanh m ề m và tròn, bóng đèn s ử. Photo by VTubeAudio. A Comparison of Current Production 12AX7 Tubes. Key features:. 6DJ8 / ECC88 is the "standard grade" of this family. Tung-Sol 12AX7 delivers good gain, but without washing out the fine details and textures. I also found that the 6DJ8 had better linearity (lower distortion), wider bandwidth, and better ability to drive the output jack with a strong low-impedance signal, which is. same circuit can be use for EL34 single ended amplifier only 2 parts need replace ,Power Trans and Out put transfomer for mejor type. The preamp valve complement is an ECC832, ECC83, and ECC81 with respective typical current draws of 20 mA, 2. 00 /ea: Add quantity: Available quantity: last 8 pc. Why Should I Match My Tubes? For a more technical explanation of why we match tubes, click here Power tubes are electrically matched so each tube will have the same amount of “idle” plate current and amplification characteristics when used in an amplifier. The valve produces a gain reduction of between 15 to 30 % when compared In stock £10. 285 results for ecc85 Save this search. In the past, I have always preferred to work with the 12AU7/6SN7 signal tubes (very similar anyway) for preamp circuits. Indeed, it can work very well in a hybrid circuit. Remember Me Create an account. 10x Rft Ecc85 6aq8 6l12 12at7 Double Triode New, Nos, Boxed Old Stock. Leapfrogging from the classic MaxiPreamp, the new design incorporates a number of upgrades including increased filament power, transconductance range, improved noise testing and a snazzy new carry-case with a clean new look. This may help you keep a fine amp or preamp running when the exact Russian or Chinese tubes cannot be found. These fantastic RFT Germany ECC85 / 6AQ8 tubes have a great warm sound and are a great affordable NOS tube. JJ Electronic - Vacuum tubes, Capacitors, Amplifiers. Dimensions. Look it up for the amp you're going to be working on. 00 /ea: Add quantity: Available quantity: more 50 pc. -A tube high voltage regulator and rectify using EZ80 and […]. The valve supplies a tight. so in some amps you can perhaps swap them around within limits. In the past, I have always preferred to work with the 12AU7/6SN7 signal tubes (very similar anyway) for preamp circuits. So the MiniAmp started as a AX84 FireFly without the cascode boost-stage with one 12AX7 in the preamp and a 12AU7 in the poweramp in a self-split push-pull configuration. Best sounding vintage tubes for old audio gear that don't cost 500 dollars each. Preamp để cải thiện bộ khuếch đại, bóng đèn 6H1 có thể thay thế loại ECC85 của Mỹ hoặc Châu âu. [size=x-small] Since some time there is a Russian tube on the American and West-European market with the code 6H1Pi that is translated 6N1P. With the very large number of vacuum tubes or thermionic valves that were produced and as a result of the multiple vacuum tube numbering systems that were in use, there are generally equivalents for most types of tube. Basic data: Uf = 6. I placed my unit between my preamp and my two power amps (MF A100, and Perreaux 2150B), and its outputs drive the two amps directly. TungSol 12AX7 handles everything from vintage rock to a clean tone sound. Price per single tube. This is the ECC85. Jul 1, 2011 #7. Baxandall type tone control circuit is the best listening tone line, and is also widely used in professional stage audio equipment today. 6C45Pi Gold Pin Preamp Vacuum Tube. pdf (235380 bytes) ECC85 Mazda-Belvu tt ECC85. I also have date code 85 with dual supporting rods. Online Store. Equivalent: 6AQ8, B719, 6L12. Tips: This product comes with two 6N1 tubes by default. TELEFUNKEN «» ECC85 / 6AQ8, Tube, Valvola, Röhre, Valvula - $34. The EF86 is type with minimised noise, only a little more noise than a Triode. 6DJ8 / ECC88 is the "standard grade" of this family. At a time when AF power transistors were replacing valves but no VHF transistors were available the ECC86 was designed to operate directly from vehicle battery supplies for car radio applications alongside transistors. My personal experience is with the Chinese Dared MP-5 amplifiers which come with 6N1 in the preamp. Most have gold plated pins, but many Sylvania manufactured 6922's have steel pins (a few Sylvania's are gold pin). So the MiniAmp started as a AX84 FireFly without the cascode boost-stage with one 12AX7 in the preamp and a 12AU7 in the poweramp in a self-split push-pull configuration. Очень хорошее состояние. JJ Electronic - Vacuum tubes, Capacitors, Amplifiers. Tube Depot carries a selection of 12AX7 / ECC83 / 7025 / CV4004 Pre Amp Vacuum Tubes. The 6DJ8 is a dual triode preamp tube. Tube Depot carries a selection of 6AQ8 / ECC85 Pre Amp Vacuum Tubes. same circuit can be use for EL34 single ended amplifier only 2 parts need replace ,Power Trans and Out put transfomer for mejor type. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. ) I decided to use a Hammond-style BB-type enclosure. It has a 4Ω output to match its 2x12" 4Ω cabinet. Dimensions. The design is almost the same as the 12AX7 preamp, it is a single gain stage triode tube with cathode follower. ONE RCA by AMPEREX ECC85 6AQ8 VACUUM TUBE - HOLLAND - NOS / NIB. 10W sinus, 15W music. China-hifi-Audio online store vacuum tube 6H1n = 6N1, ECC85, 6N11, E88CC 6922 Russia made NOS - Vacuum tube. Tubes; Tube Sockets; Capacitors; Dr. ECC85 / 6AQ8 RFT tube - PREAMP / DRIVER tubes - Collection of Trev Levick D. Messages: 4,342. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for. Originally, the 12AX7 / ECC83 vacuum tube was introduced to be a superior option for lower noise and microphonics over the 6SL7 tube that was commonly used in the 1940s. Class-A 12AU7 Tube Headphone Amplifier This is simple to build audiophile class-A tube headphone amplifier. If you want the best 6AQ8 / ECC85 in the world, this is your chance to get a pair! These are Philips ECC85 from Holland Tested on our B+K tube tester. 5 mA; S = 4. For his RIAA-stages he chose EF86 and later ECC808, a post-manufacture version of ECC83, quite a rarity today. ECC85 VALVO 6AQ8 Tubes RF-twin Triode. This tube is sometimes called the equivalent for 6DJ8/ECC88 or 6922/E88CC. The effect is called Partition noise and makes the Pentode noisier than a Triode. 50 Watts/Channel · Eight EL34s · Two ECC85 Valves · Two ECC83 Valves · Chrome Facia EAR 890 Push-pull power amplifier using eight KT90 output valves (four per channel). 01 5 5 1969. 2020 popular fever tube, 6p1, diy tube, 6z4 tube trends in Consumer Electronics, Amplifier, Speaker Accessories, Home Improvement with 6n1 Tube and fever tube, 6p1, diy tube, 6z4 tube. 10W sinus, 15W music. Board size: 115 × 116 board, thickness 2mm Due to the unique. Volume is identical, just better sound. I also found that the 6DJ8 had better linearity (lower distortion), wider bandwidth, and better ability to drive the output jack with a strong low-impedance signal, which is. Ersatz der ECC85 im UKW -Teil eines Rundfunkempfängers Was sollte beim Ersatz einer speziellen UKW-Type, der ECC85, im UKW-Teil beachtet werden, wenn sie mit einer Röhre aus russischer Produktion, der von dort als Audio -Röhre propagierten Type 6n1p (6 H I ) unbedingt bedacht bzw. New Free PCB Design Software July(1) LM317 Constant Current Calculator, Tool March(1) LME49811 + THERMALTRAK AMPLIFIER AND SERVO CONTROL - PART 1 2013 (22) April(6). If you're surfing through cheap deals on tube power amplifiers UK, uk. 7308 and E188CC and the CCa are super premium versions. At first we might expect the ECC88 to be the best choice for fooling around at low voltages, as it appears to offer the highest gain and best linearity. Does anyone have any recommendations for budget bookshelf speakers to pair with the Fatman iTube. The EF86 is type with minimised noise, only a little more noise than a Triode. Allgemeine Vorgaben wie Heizung und Anodenstrom, Anodenspannung und Anodenverlustleistung je. The tube is ECC85. The two independent valves are screened by a rectangular plate across the diameter of the envelope. All tubes are fully. The RM-1 preamp that resulted had, and still has, the quietest phono stage extant with tube input. DescriptionMusic Angel MENG M5 845 x4 120watt Hi-End Vacuum Valve Tube Integrated Amplifier Using Push-pull and high pressure delays buffer to supply power Adopts USA DALE military resistance and Teflon Silver Line. One triode would be used as an RF amplifier and the other as the local oscillator. Power amplifier 2A3/ 300B/ 6C33C. More detailed sounds. The ECC85s were made by Röhrenwerk Neuhaus, Germany - probably in the 70's. The preamp outputs are automatically turned off when you plug in your headphones. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940s. When in doubt, we start with Tung-Sol 12AX7. ONE RCA by AMPEREX ECC85 6AQ8 VACUUM TUBE - HOLLAND - NOS / NIB. There aren't any in current production and with most of them being of European origin, they are getting expensive. 6BM8 (also ECL82) Preamp/Power Vacuum Tube. According to us, must a tube which can be. The first electronic amplification of sound was done with Vacuum Tubes. Best sounding vintage tubes for old audio gear that don't cost 500 dollars each. However, you do need to follow some standard tube layout and construction procedures. Certainly, better results can be achieved climbing a few more rungs of the ladder, but with the law of diminishing returns in mind, the LP-100 is a great investment that allows future cartridge upgrades without the need to purchase another suitable phono pre-amplifier. The ECC85 is the definitive double triode for the front end stages of FM radio receivers. Actual item shown as pictured The image is exactly what you will receive upon purchase. The Lorenz ECC83s sound very nice, too. Price is for 8 tubes in seemingly NOS condition. But if IIRC, the 6N1 and ECC88 aren't all that close spec wise whereas the ECC85/6AQ8 is almost identical. item 7 Mullard ECC85, 6AQ8, B719, 6L12 double triode valve/ tube, NOS/ NIB - Mullard ECC85, 6AQ8, B719, 6L12 double triode valve/ tube, NOS/ NIB £15. Buy only from reliable sources!. vacuum tube 6H1n = 6N1, ECC85, 6N11, E88CC 6922 Russia made NOS QINPU S-2 hifi speakers loudspeakers pair 2011 latest Red Qinpu A3 Integrated Amplifier with headphone amp tube 6N3 hifi audio. Tube preamp Marantz 7c, kit, made in Belgrade, Srbija, IkaP Acoustic & Comps! -Circuit design based on classic Marantz 7c preamp. I have many other types of tubes. The owner told me that the socket next to the power tube is the phase inverter and you should use a 12AT7. 685 volts of input to drive it to full power. I have many other types of tubes. The latter reminds me a lot of the so-called 'super tube' 6H30P. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. As well it offered more gain. The 100 Watt mono is a Tim de Paravicini design classic that has been in continual production for over 30 years. The 12AU7 (ECC82) is a Twin Triode vacuum tube, it is very popular in the audio world because it is rather rugged and can be operated at lower voltages. The ECC85s were made by Röhrenwerk Neuhaus, Germany - probably in the 70's. This valve contains two triodes, V1a and V1b. Today, a look at almost any guitar tube amp, be it Fender , Marshall , Vox , or any other, will prove the 12AX7 / ECC83 / 7025 tubes are here to stay. The RM-1 preamp that resulted had, and still has, the quietest phono stage extant with tube input. Tung-Sol 12AX7 delivers good gain, but without washing out the fine details and textures. An ECC81, for example, will have similar mu and gm, but has better linearity in voltage amplifiers and is readily available (still in production). As a general rule, New Old Stock European or USA equivalent tubes will outperform and outlast Russian or Chinese stock tubes, so it is worthwhile to look into the possibility of re-tubing your equipment with NOS tubes. 5692 RCA Red Base New: RCA brand-red base. 3v 435mA heater filament, with an isolation shield between the two triodes, connected externally to pin 9. This is the early generation, produced from the late 1950s - mid 1960s. Shipping to 98052: Items in search results Preamp Tubes (9) Tube Socket (3) Brand see all Brand. Most have gold plated pins, but many Sylvania manufactured 6922's have steel pins (a few Sylvania's are gold pin). This may help you keep a fine amp or preamp running when the exact Russian or Chinese tubes cannot be found. EHX 9V Battery Vintage Style #1 Echo Digital Delay. The ECC86 is very special high frequency double triode. ECC83 Telefunken 12AX7 Types My regular job does not have any connections with vacuum tubes, except for the music endlessly playing on my tube amplifiers. Welcome to Portugalradios Tube are in perfect physical condition It has been carefully tested, and is guaranteed to be in good condition, no shorts or leaks. Jul 1, 2011 #7. ECC82, ECC802, E80CC*, B749, CV491, CV4003, 5814, 5963, 6189, 6350, 6680, 7316, 7730, 12bh7*, 6fq7** , 6gu7**, 6cg7**,  6dj8**, 6AQ8**. JJ Electronic - Vacuum tubes, Capacitors, Amplifiers. Filters will be recalculated so don't mind little things in the schematic. ECC is a european designation, hence Marshall, from England came with ECC-83 pre-amp tubes, while Fender [american] came with 12AX7's, same tube, different designation. After finished my simple 12AX7 tube preamp, I decided to try other medium mu tubes, including the 12AU7 and also this 6922. The 12AX7 Valve (or 12AX7 vacuum Tube) is a small preamplifier valve which is identical to the ECC83 – same valve, just a different name. 6aq8 - ecc85 - 6bq7 - 6n1p The 6AQ8/ECC85 is a popular preamp tube The Russian 6N1P has become quite popular and can be replaced by any of these tubes. Цена указана за 1 предусилитель. The 6AQ8/ECC85 is a popular preamp tube The Russian 6N1P has become quite popular and can be replaced by any of these tubes. ECC85 / 6AQ8 RFT tube - PREAMP / DRIVER tubes - RTT Franzis Collection of Reinhard Riek D. It is used in 99% of all guitar amplifiers. Borbely design. The widest range of preamp tubes available in stock ready to go can be found right here at Evatco. September 19, 2011 by Ventsislav Simonov 2 Comments. We accept payments by: Average delivery time to United States is 16 days. The 5692 is a commercial "premium" version of the type 6SN7 tube. Simulated heater glow turns on as front mounted sensor detects darkness. To suggest a video, send email to: Submissions to EHX. manufacturers, along with a small number of European manufacturers and are tested. Ετικέτες 12ax7, 6n2p, audio tube amplifier, audio tube preamplifier, audio tube preamplifier for guitar with tone control, ecc83, guitar, hi-fi 600 Watt Hi - Fi audio power amplifier PA600 Attached is the schematic of a PA or subwoofer power amplifier capable of delivering about 650W RMS into 4­ loads. Displaying products 1 - 23 of 23 results:. ECC85 Datasheet - Double Triode, pdf, pinout, equivalent, replacement, schematic, manual, data, circuit, parts, datasheet. A Guide to ECC83 type Pre-Amp Valves By Stewart. ECC85 Brimar tt ECC85. See our Best 12AX7 Review for top choices for your application. More detailed sounds. Stromberg Preamp Official Site. However, because the two triodes are AC coupled together the stage can suffer from blocking distortion, although a simple DC coupled version appeared in the unusual Juergen-Simon 'Advanced Bass Preamp' in the early 1990s. Local IF injection is fed to the cathode of this mixer stage via R2 and C4, L3 and C3. It was designed specifically for the purpose and released in 1954. » Vacuum tubes by use » PREAMP / DRIVER tubes » ECC85 / 6AQ8 RFT tube: ECC85 / 6AQ8 RFT tube Manufacturer: RFT factory $ 10. All Electro-Harmonix Products Effect Pedals by Name. New (38) Open box (20) Seller refurbished (2) Used (11) For parts or not working (1). New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. A Comparison of Current Production 12AX7 Tubes. A tube preamp is a unit that preamplifies a weak signal into a level of higher voltage and/or current, and where any overdrive/distortion occurs or is accomplished with one or more vacuum tubes. ECC83 / 12AX7 / 7025 / 5751 Dual Triode The ECC83 or 12AX7 is a miniature 9-pin high gain (100mu) dual triode tube. Discover over 338 of our best selection of fever tube, 6p1, diy tube, 6z4 tube on AliExpress. 1977 год выпуска ЛОМО. High-quality, double-sided, extra thick, 2-oz traces, plated-through holes, dual sets of resistor pads and pads for two coupling capacitors. ECC is a european designation, hence Marshall, from England came with ECC-83 pre-amp tubes, while Fender [american] came with 12AX7's, same tube, different designation. ECC83 Telefunken 12AX7 Types My regular job does not have any connections with vacuum tubes, except for the music endlessly playing on my tube amplifiers. amplifiers and self oscillating mixers. I built a tube preamp in a DIY portable guitar amp. This is not possible for the most wanted part numebrs. ECC85 / 6AQ8 Dual Triode The ECC85 or 6AQ8 is a miniature 9-pin high gain (57mu) dual triode RF tube. RIAA preamps with Siemens Parts According to the RIAA equalization curve many hifi designers quote that the bass reponse must be increased about 20dB at 20Hz and the high frequencies must be decreased about 20dB at 20kHz. 1W in the original RM-1 was too much and backed it off to 0. The most reasonable design of the Baxandall 6N1 tube tonal circuit board: British PJ. At the plates on fixed bias mode. vacuum tube 6H1n = 6N1, ECC85, 6N11, E88CC 6922 Russia made NOS QINPU S-2 hifi speakers loudspeakers pair 2011 latest Red Qinpu A3 Integrated Amplifier with headphone amp tube 6N3 hifi audio. All Electro-Harmonix Products Effect Pedals by Name. The 12Ax7 tube is by far the most popular preamp tube used in guitar amplifiers. ECC88 Preamplifier / buffer June(1) Thorens Power Supply Upgrade TD-150, TD-160 April(1) 50Hz Strobe Light. 10 X ECC85 6AQ8 B719 6L12 Preamp Audio Valves Tubes Röhre RFT Tesla Tung. Since we had a 300V B+ supply I had to make calculations for this. Daddario XT 80/20 Bronze. oscillator section of the ECC85, as well as semiconductors driven by vacuum tubes, as the same varactor diode whose bias voltage is stabilized by a neon tube. TungSol 12AX7 handles everything from vintage rock to a clean tone sound. So they dont drive so hard as a 83 at the same gain. -Circuit using two 12AX7, anode followers and one 12AU7, to lower the output impedance, a cathode follower is used. The 12AX7 , 12AT7 , and 12AU7 all belong to the same family of nine contact, twin triode tubes. Well-priced lot!. Köykkä knew his tubes. Philips Miniwatt 12AX7/Ecc83 preamp tubes. Also the gain and recommended anode voltage is different so they might not set properly in some amps. Hello! I need the whole scheme (circuit) or project for preamplifier with ECC88 or ECC82?:confused: Thank you. 01 7 FP 1999. Superb workman. It dose't need any power supply, just connect it with your source and pre-amp by RCA capbles. With the very large number of vacuum tubes or thermionic valves that were produced and as a result of the multiple vacuum tube numbering systems that were in use, there are generally equivalents for most types of tube. TungSol 12AX7 is our go-to tube for guitar amps. 6BM8 (also ECL82) Preamp/Power Vacuum Tube. Dôkladne si umývajte ruky, vyhýbajte sa kontaktu s ľuďmi a pozrite si zdroje informácií, ktoré vám pomôžu prispôsobiť sa aktuálnej situácii. Power supply uses ECC82. Over the past several months, I have been working on a new 2015 Musica Bella LeAnna preamp circuit. Price per single tube. d = Diode Unit. ECC802S (12AU7 / ECC82) Tube SRPP Preamp Build Details. 01 6 6 1969. Choose a link from the. Passive Pre-Amplifier: BEZ DT-561. From the sonical point of view it is much more important that the RIAA equalization is correct at 100Hz and 10kHz where about 13. Remember Me Create an account. Without going into some of the more obscure tube types, I played with the 12xxx series, 6SN7/6SL7 types, 5687 and the 6922/6DJ8. 6AQ8 (also ECC85) Preamp Vacuum Tube. tubes store. This amp was fitted with 2x 6CA7 (EL34), 4x 12AX7 (ECC83), 1x 6AQ8 (ECC85) and 1x 5AR4 (GZ34). These fantastic RFT Germany ECC85 / 6AQ8 tubes have a great warm sound and are a great affordable NOS tube. Or: Common and fairly inexpensive wonderful sounding vintage audio tubes for your unmodified McIntosh, Dynaco, Marantz, Fisher, Scott, etc. RCA engineers developed it around 1946 and released it for sale as the 12AX7 shortly after. We offer some of the most comprehensive testing facilities available today. ECC85 Datasheet, ECC85 PDF, ECC85 Data sheet, ECC85 manual, ECC85 pdf, ECC85, datenblatt, Electronics ECC85, alldatasheet, free, datasheet, Datasheets, data sheet. The most frauded tubes there are ECC803S and ECC88, because thes are practically unavailable as NOS tubes. Interestingly, the ECC85 is used as a mixer/oscillator on AM. It has a 4Ω output to match its 2x12" 4Ω cabinet. As a general rule, New Old Stock European or USA equivalent tubes will outperform and outlast Russian or Chinese stock tubes, so it is worthwhile to look into the possibility of re-tubing your equipment with NOS tubes. Having more than 20 years of experience in manufacturing "Hi-End Vacuum Tube Amplifier", Audio Space has established a strong position in the international audio. Each wound string is precision wrapped with round nickel-plated steel onto a high carbon, hexagon-shaped steel core. Tube Power Amplifiers. 01 3 3 1969. 1 low noise pair) JAN-12AT7WC Raytheon Kuhl-Tube cryo NOS black plates triple mica "O" getter 1975 1 tube) 8. 00 4 x 6H1n Russian $20. There are different adapters for power tubes and for preamps. Amperix 6dg8 tubes probably worth $250 pair. 01 5 5 1969. Free shipping. shipping:. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940s. The valve produces a gain reduction of between 15 to 30 % when compared In stock £10. BASCOM-AVR Project 2014 (3) September(1) Multisim Blue. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. Thanks to its design it also peforms with very low noise and microphonics. Sau khi tr ải nhiệm , nhi ều khách hàng đánh giá là t ầ n s ố th ấ p r ất tốt, độc căng và lực lặn sâu được cải thiện rõ ràng , âm thanh m ề m và tròn, bóng đèn s ử. If you are seeking for affordable power board for amplifier with the best quality, we have great collections of designs for you. - Please contact me if you face any issues with your order before opening a. Preamp Tubes ECC83 + 12AX7 E83CC + 12AX7WA + 7025 Other Preamp Tubes E88CC + 6922 + 6DJ8 ECC85 ECC82 E82CC + ECC802S 12BH7 + 12BH7A ECC81 + 12AT7 Power Amp Tubes Other Tubes Rectifier Tubes Mixing Desks Timers Power Converters Option Boards Defective Items Active Crossovers TVs Beamers + Screens Portable Radios Cables + Plugs Hifi Furniture. Or: Common and fairly inexpensive wonderful sounding vintage audio tubes for your unmodified McIntosh, Dynaco, Marantz, Fisher, Scott, etc. brand new old stock mint tubes in origional boxs. just like same sound of 6AQ8(ECC85). They are small, highly robust components that are custom engineered for many insert/removal cycles. Each wound string is precision wrapped with round nickel-plated steel onto a high carbon, hexagon-shaped steel core. Collection of Hermann. 12AX7 Family Tube Substitution. Очень хорошее состояние. 01 3 3 1969. I am looking for 4pcs matched and balanced ECC82, ECC802S or 12AU7 Amperex or Philips Holland and Telefunken if you can please advise price. ECC85 page sheet date 1 1 1969. 01 4 4 1969. In most tube preamps/amps today, you can substitute any of the tubes in this family for one another. Power amplifier 211/ 805/ 845/ GM70. 1 low noise pair) JAN-12AT7WC Raytheon Kuhl-Tube cryo NOS black plates triple mica "O" getter 1975 1 tube) 8. 5 out of 5 stars 25. ECC82, ECC802, E80CC*, B749, CV491, CV4003, 5814, 5963, 6189, 6350, 6680, 7316, 7730, 12bh7*, 6fq7** , 6gu7**, 6cg7**,  6dj8**, 6AQ8**. September 19, 2011 by Ventsislav Simonov 2 Comments. d = Diode Unit. My personal experience is with the Chinese Dared MP-5 amplifiers which come with 6N1 in the preamp. Prices and availability are accurate as of 2020-06-27 02:48:17am and are subject to change. This jumper will drain any high voltage to ground through the 50k to 100K plate resistor on the tube. -A tube high voltage regulator and rectify using EZ80 and […]. 2 X ECC85 6AQ8 Valvo Hamburg TU1 Philips Holland Tested. 00 /ea: Add quantity: Available quantity: last 8 pc. Volume is identical, just better sound. The effect is called Partition noise and makes the Pentode noisier than a Triode. We find this incorrectly! [/size] [size=x-small] Unfortunately will the notion "equivalent" not be interpreted the same by everybody. The others are all NOS types. Most have gold plated pins, but many Sylvania manufactured 6922's have steel pins (a few Sylvania's are gold pin). MULLARD 12AX7/ECC83 AUSTRALIAN MADE 12ax7/ecc83 tested high quality used as new, test strong, quality tubes. At a time when AF power transistors were replacing valves but no VHF transistors were available the ECC86 was designed to operate directly from vehicle battery supplies for car radio applications alongside transistors. These ECC85 tubes were made in Germany. I have used 6DJ8s for my ARC preamps and they sound fine. at7s can take 10x the amount of voltage that an ax7 or 5751 can. After researching the parts (transformers etc. Don't trust it when a sellers offers those repeatedly for low prices. ) and your preamplifier to improve sounds and reduce digital noise. TungSol 12AX7 is our go-to tube for guitar amps. Power amplifier 2A3/ 300B/ 6C33C. ECC85 / 6AQ8 Dual Triode The ECC85 or 6AQ8 is a miniature 9-pin high gain (57mu) dual triode RF tube. 93 (2 new offers) Tube Amp Doctor ECC83WA / 12AX7 Premium Selected Vacuum Tube. That's a bit much and so it would be a good idea to use an amplifier outside the feedback loop to bring up the input. This tube has had new print put on it (the original wears off easily with Telefunkens) but it otherwise look and tests new. Find great deals on eBay for ECC85 in Vintage ECC85 / 6AQ8 RFT tube - PREAMP / DRIVER tubes - Collection of Oskar Elm D.