Ef80 tube amplifier. EF80 push EL153, DIY with a picture tells a story.

Ef80 tube amplifier English. The power supply uses an EZ80 (6V4) tube rectifier. I have also ordered to output transformes. Je m Tube EBF 80 or Röhre EBF80 ID720, Double Diode-Pentode, Noval, 9 pin miniature (USA pico-9) B9A and RF/IF-Stage shown. Please login a Rob Robinette Micro Champ with an EF80, SS rectifier, and toroidal PT. EF80 based power amp for guitar. 39. Throw a Strymon Flint reverb & tremolo This is a project of stereo tube amplifier based on tubes ECL86 (two systems) and EF80 (pentodes used in triodes system with bridged S2 to anode and S3 to cathode) with speakers GDN16/10 with cobalt core and GDW6,5/1,5. Deze radio werkt zonder anodespanning, en oscilleert toch. The 269EX/369EX is a good choice for any amp using an EF80 power amp but it does not include a 5v secondary so use an EZ81 (6. May 30, 2019. I did that, it's pretty easy to do, and it adds a little extra Tube Amp Doctor Cryo ; Tung-Sol RI Cryo; Tungsram Cryo; Voskhod Russia Cryo; Cryo Valves By Type. ru: EF80: html page, MAZDA Valves & Picture Tubes Data, MK buizen handboek: Frank Philipse (Wildcat mirror - Jörg Jan Münter) This amplifier is hand-wired by myself - all parts sourced and selected to offer a top quality amplifier at a very reasonable price. Building, troubleshooting and testing of these amplifiers should only be Ditch the EF80's and use ECC81 or ECC83 instead, otherwise it'll be OK. It was described by Mullard as: a high slope RF pentode and not a variable μ type. 8mA. Open Box More information. It is tested using the Amplitrex AT1000, the RoeTest R9 Professional System, or a freshly calibrated and upgraded TV7-D/U. The robrobinette. jpg; Amp Stuff. com ef80 slo micro. Trending at Zelfbouw Radio met EF80 of EF184 zonder anode spanning. Micro Amps Champ Micro Amp A MajorValve© designed 1 watt Micro version of the simple but great sounding late 1950's Fender tweed 5F1 Champ. And those who disseminate high-frequency tube audio is not well people use the rumor nowhere to hide. 2) = 2. 35 A. CRT heater supply MUST So here is a long overdue write-up of the LaFigaro 339 OTL tube amp after having owned it for a little over 1 year. The input stage uses a EF86 to drive a Mullard EL84. 7-1952, Seite 176: Telefunken entwickelte eine Serie Spezialröhren mit langer Lebensdauer und The power supply groups are: +2250V for the power amplifier tube RS1002A plate power supply; -320V for the power amplifier tube RS1002A grid Power supply; +500V is the power supply for the RS1003 plate of the drive tube; +80V is the power supply for the EF80 plate of the preamplifier. jcmusic Well-Known Member. I need help with combining these tubes and the transformers to an amplifier. diyAudio Community diyAudio Store. Dual: CV 11 : The Mullard EF80 is a quality tube perfect for your application. png (34. Building, troubleshooting and testing of these amplifiers should only be EF80 push EL153, DIY with a picture tells a story. ef80 can usually be replaced by 6AH6 (usa), 6 * 5 (cccp), 6J5 (CN), which cost made in Germany, NOS Tested, function min. 5: mA: g m: 7. 2 x JJ EL84 ( 6BQ5 ) Matched Pair Guitar Amp Vacuum Power Tube /Valve - UK Stock. Heater of tubes 6CC42 is 6. Post by kuDo » Sun Jan 09, 2022 10:59 pm. ECC81-12AT7-CV4024-6201; ECC82-12AU7-5814A-6189; ECC83-12AX7-5751-7025; The EF80 internally screened pentode that was used mainly VHF TV and electronic equipment and also radio tuners. Moderators: pompeiisneaks, Colossal. My first project was a Mark IIc+ preamp which was also a pre-amp only. EF80 push EL153, DIY with a picture tells a story. I have a question regarding v5. dissident-audio. Welcome To the Hoffman Amplifiers Forum December 05, 2024, 01:44:08 pm: Welcome, Guest. This is a suitable replacement for any 6BX6 / EF80 tube type. Tube I use is very common tube. JPG. Joined Jan 8, 2017 Messages 41. The EF80 is a special pentode that was designed by Ei in Title: EF80 Author: Tesla Subject: JHl-VC-FP-2012-05-12 Created Date: 5/12/2012 1:19:41 PM Characteristics. Hoffman Amplifiers Tube Amp Forum, Funky local NFB on EF80 single ended power tube? Welcome To the Hoffman Amplifiers Forum around an EF80 single ended power tube? The gain of the EF80 is roughly 60 (i think), which is similar enough to an 12ax7. A27; May 27, 2018; Tube Audio; Replies 9 Views 706. The 6BX6 also known as the EF80 is an internally screened pentode and was a workhorse of the VHF TV receiver. More info on Let me say first, the conversion from a cathode biased 2w “mikro amp” with a toroidal power xformer, a cap can for filtering, and two noval output tubes to a fixed bias 40w amp with a laydown power x former, large 80uF filter caps, huge output iron, huge choke, and two octal output tube sockets was traumatic to say the least. 3 A. 669. 00/each for EL803S version A place for tone seekers to discuss tube amps and analog goodies. Joined 2004. Finished. £53. ga('ec:addImpression', { 'name': 'ECC83-JJ TAD Premium Selected', 'id': 'RT003', 'price': '29. It was made in spatial installation method. Reply March 3, 2018 Jim ️ Author: Hai Wei | 📷 Photo: Hai Wei The 5th generation MP-501 is the flagship integrated amplifier produced by Musical Paradise. Home; Forum; Papers; Market; Tubes + Tr; Ein Datenblatt aus den Niederlanden vom 15. Thomas_H Posts: 43 Joined: Wed May 07, 2014 2:48 am Location: Brasil. General discussion area for tube amps. Building, troubleshooting and testing of these amplifiers should only be performed by someone who is thoroughly familiar with the safety precautions around high voltages. What I found especially intriguing about this amp is that it is a true no-feedback, single-ended, class-A 300B design. Henry . There must be quite a few amp techs that have tubes in their stash that they may never use. I have two EF80 tubes and will get two EL84 tubes from a friend. The Marshall JTM45 AMAZING F2a Push-Pull Tube Amplifier! like a jewel! I can tell you,-very. Open box items are final sale. Its cathode is r esistant to standby operation. 4: mA/V: r a: 500: kΩ: Peter Vis; Experience; ICT; Vis Labs Tube EF 50 or Röhre EF50 ID2497, Vacuum Pentode, Loctal-9-Pin (B9G) and RF/IF-Stage shown. 5 watt power amp. 90% Corresponds to Telefunken EF80 Use for example for Telefunken U47. (or use "76" for fried 6L6s or "88" for the fried EL86!! This channel is bilingual, German and English. images/Guitar/Tubes/Plates. I've Home. Email Password Forgot Password? Guitar Tube Amp Kits; Bud Guitar Tube Amp Kit; Classic British 18W Tube Guitar Amp Kit - 1x12 Combo; Classic British 18W Tube Guitar Amp Kit - Head; RR763-M Blackvibe Micro This is the one watt, 12AU7 push-pull power tube version of the Blackvibe that is perfect for true bedroom level practice and studio work. The Hammond 125B five watt output transformer wired for 22. There is no internal shielding as in EF800, which makes the tube used to 30 MHz. 1 Go to page. I had a bunch of old Mullard EF80 and EF184 valves from the '50s and 60s in the junk box (the EF184 was the successor Micro Amps Champ Micro Amp A MajorValve© designed 1 watt Micro version of the simple but great sounding late 1950's Fender tweed 5F1 Champ. Buy 13pcs Set EF80 EF-80 Tube Polam Tungsram RFT Wf Analogue online on Etsy India. The EF89 is a miniature RF variable μ voltage amplifier pentode for use as an RF or IF amplifier in FM/AM receivers and is designed to work with a tuned anode circuit. 00/each for EL803 version US$26. This month I finish the EL152 pentode single amplifier. 7W max FAQ and General Tube Amp Electronics Troubleshooting; ↳ FAQs; Shop Talk; ↳ Technical Discussion; ↳ Garage Talk; ↳ Speakers This is why tube amps tend to sound "warm". Better than Amazon. Bruxelles (Mazda). Regular price $8,499 Sale price $8,499 Regular price $15,000. Mein Equipment:S Duncan''s Amp Pages: EF80: Acrobat PDF (6 pages) National Valve Museum: EF80: html: oldradio. Input Values for Type 5070Ax211x a =. 5W max, and screen dissipation is 3. Deutsch; 3-year Audiosteps warranty; 30 days money back; Customer service; Products search. Keep us posted. item 6 VINTAGE MULLARD RADIO VALVE ~ EF80 ~ NEW OLD STOCK VINTAGE MULLARD RADIO VALVE ~ EF80 ~ NEW OLD STOCK. They also offer switchable Ultralinear (UL) and Triode tube configurations, a popular novelty carried over into the REF80S. Should pass the microphonics test. 7V creates a plate voltage swing of 0. 8 KB Reply. Bass is not emphasized. Champ Micro EF80 Uses EF80 small pentode for the 1. 5E3M Order 6BX6 / EF80 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. Member. UralTone EF80 Tube Stereo Preamp build guide. Thread starter TURING; Start date 2016-01-12 3:42 pm; Prev. Soldano SLO-100 Based 1 Watt Amp With EF80 Power Amp. Sylvania 6BX6 | EF80 Mullard Made Pentode Mixer Amplifier Tube NOS Amplitrex/TV7 Tested CALIFORNIA PROPOSITION 65 WARNING WARNING: Cancer and ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': '6360 / QQE03-12 / RS1029 Duo-Tetrode', 'id': 'S6360', 'price': '8. 2. Hoffman Amplifiers Tube Amp Forum, Robrob slo ef80 amp build question . International builders can (from EF80 data sheet, screen current is 25% of cathode current at Va = Vk = 250V) Plate dissipation is then 9. Building, troubleshooting and testing of these amplifiers should only be performed by someone who is thoroughly familiar with the safety Find many great new & used options and get the best deals for EF80 MAZDA ELECTRONIC TUBE / VINTAGE VALVE TUBE AMPLIFIER at the best online prices at eBay! Free shipping for many products! The effective cathode impedance is equal to the 2. Apr 2, 2010 #2 One amp uses tubes made by M. The level of hum and noise in the prototype amplifier, measured with an open-circuited input and the tone controls set for a flat response, is better than 65dB below 3W. Welcome To the Hoffman Amplifiers Forum December 24, 2024, 05:46:34 am: Welcome, Guest. Reactions: Adriel, TonyTecson, Aridace and 2 others. Po rt K/XA14-19 1: Block schematic diagram Type 5070A. (Miller Effect). This is a EF80 push pull power amp intended for guitar use derived from a design Rob Robinette created and shares on his website (robrobinette. . A place for tone seekers to discuss tube amps and analog goodies. Reverb and tremolo were the main functional innovations in Fender’s blackface line. My Dutch is not too good, but 6BX6/EF80 looks similar to 6CB6 and gets used for audio. This article is to teach you how to design, diy, out of a high quality tube amp. sitemap. 5E3M Deluxe Micro Amp The Deluxe Micro is a compact amp which attempts to capture the magic 5E3 tweed Deluxe tube guitar amplifier tone in an UralTone EF80 Tube Stereo Preamp on täysputkietuvahvistin, joka toimii ulkoiselle 6VAC virtalähteellä. I did that, it's pretty easy to do, and it adds a little extra WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. peterbach Active member. Some designs from that era still outperform most of the "modern day" gear. My hunch is that this amp will have a lot of gain, and could suffer from overloading in the EF80 stage. The type was introduced in 1950. Po rt E/SI M. Tube EF 89 or Röhre EF89 ID841, Vacuum Pentode, Noval, 9 pin miniature (USA pico-9) B9A and RF/IF-Stage shown. 00 General discussion area for tube amps. Duncan''s Amp Pages: EF80: Acrobat PDF (6 pages) National Valve Museum: EF80: html: oldradio. 2011-03-14 9:15 am A place for tone seekers to discuss tube amps and analog goodies. I'm interested in your thoughts. Shop for handmade, vintage and unique Souvenirs & Events items from RetroIF online on Etsy Hifiman EF1000 Hybrid Tube Headphone & Speaker Amplifier - Open Box Hifiman EF1000 Hybrid Tube Headphone & Speaker Amplifier - Open Box Final Sale More information. Vintage or new, boutique or not, let's talk about the sweet tone makers. The 4x10 dual-6L6 40-watt Super Reverb has half that power, a softer tube rectifier, . This 30KG monster consists of 4 units Tung-sol KT150 power tubes by default, providing 55W (RMS) output per channel under pure Class A mode. V a(b): 170: V: V g3: 0: V: V g2: 170: V: V g1-2: V: I a: 10: mA: I g2: 2. com then order a 5E3 chassis, the transformers, extra 9-pin sockets, 8-pin to 9-pin adapter plates, EF80 power tubes, EZ81 rectifier tube (or use solid Combine EF80 with El84 This is the first time i'll build a tube amplifier. Dus een oscillator zonder anodespanning. This amplifier uses a 12AY7 for the preamp tube and an EF80 for the output/power tube. Great promise. Hammond 269EX/369EX Power Transformer. Mullard EF80 | 6BX6 Pentode Mixer Amplifier Tube NOS Amplitrex/TV7 Tested CALIFORNIA PROPOSITION 65 WARNING WARNING: Cancer and Reproductive Harm-www PCB Board DIY kit Vacuum Electron Tube DIY Tube Amplifier kit Tube Amplifier kit Valve Preamp Amplifier Board Tube Headphone Amplifier Kit Headphone Amp Parts Musical can i modifie the ntk schematic's for using with ef80 tube ? Attachments. Strange, that era was the golden age of tube amplifiers. E. qrz. Note the position of the HV center tap and the full wave conventional rectifier wiring. Push-Pull (PP) EL84 Tube Amplifier Schematic Other Push-Pull EL84 (6BQ5) Tube Amplifiers. Made in Germany by Telefunken Ulm factory with WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. This is the classic single-ended EL84 schematic from Mullard. 2kΩ cathode resistor in parallel with the reciprocal of the tube's transconductance. According to the plate transfer characteristics, a grid voltage swing of 0. Great upgrade to your McIntosh Tube Tuners, Receivers, Amps, and other Vintage Tube Gears. The Die EF800 entspricht etwa der EF80 (ähnlich Daten, ähnliche Kapazitätswerte usw). Tube Audio; Replies 19 Views 4K. 3v). 3v heater filaments. Assembly of 3 Watt Amplifier Since the wiring of the 3W amplifier is Its designed as an IF amplifier not as an audio tube that's why its WORKING voltage is around =200V/200V I have never run it at its limit . I have been building my first tube amp. Amplifiers. 5 posts • Page 1 of 1. We have various European brands available. B. Gold pins, halo getter. Would pin 4 (and pin 5) be heater pins? Zp-p = (120 to 180) x Sqrt(tube Pdiss Watts spec)/(tube max DC spec in Amps) 120 for max power, 180 for low distortion, or in between for in between results. The transconductance at the DC operating point is therefore approximately These estimates are well within the plus-or-minus Their review: Our Preferred Series 7189 tube is a versatile high quality option for EL84, 6BQ5, and 7189 tube circuits because of its clean headroom, power, dynamics and harmonic content. made in Germany, NOS Tested, function min. The distortion fattens up the tone of anything being amplified by a tube circuit. Single ECL84 amplifier build. The EF85 was the European Brands EF80 / 6BX6 This pentode was used in Intermediate Frequency amplifiers for many types of equipment: radio, Radar but probably best known as the dominant workhorse of VHF television receivers. It's a compact, moderately easy to build, three tube, 3 to 5 watt output practice amp (around 3 watts with a 12AU7 power tube and around 5 watts with a 12BH7). The Champ Micro's B+ filter node is now used for the power tube plates (B+1). You're quite right with the EF80/EF85 vs. 81W vs. £6. The circuit has two successive EF80 gain stages with a Baxandall tone circuit. com. 339: ef80 mesh with simple rca 6as7g. 50 + £5. Vacuum tube amplifier. 84 x (253-4. xml; images/Miata/Miata2. Post by kuDo » Mon Jan 10, 2022 7:30 pm. Suunnittelimme laitteen synien / rumpukoneiden / samplerien perään, mutta testeissä huomasimme, että laite soundaa upealta The EF80 Ei made in Yugoslavia is special quality high-gain, pentode with a lifespan exceeding 10,000 hours under standard operating conditions. Currently EL152 is driven by ECC88. 3v) tube rectifier or a solid state rectifier. I did that, it's pretty easy to do, and it adds a little extra thickness to the sound. These come screened for low noise and microphonics. Good for microphone use. 3 V 0. Mullard Single-Ended (SE) EL84 Tube Amplifier Schematic. German Stereo Integrated Tube Amps : Deutsch - All amps have solid state rectifiers - except where otherwise noted (EZ81 or GZ34) 2 ECC83 + 2 EF80 + 2 EC92: 4 EL84: EZ81 tube rectifier. For more information about tube based power supplies, see the article Power Supply Design for Vacuum Tube Amplifiers. 31 posts Previous; 1; 2; 3; Next; kuDo Posts: 104 Joined: Tue Oct 06, 2020 9:29 pm Location: The Netherlands. images/Guitar/HowAmpsWork Hoffman Amplifiers Tube Amp Forum, Rob Robinette Champ Micro Build . 3 Volts / If 0. UralTone EF80 Tube Stereo Pre is designed to enhance and eq line-level instruments. Po rt A/A8-15/D8-15. The Input Resistor also functions as the grid leak resistor for tube amplifier stage V1A (valve 1, first half of the tube). Yvesm. Ich stelle Euch einen meiner Röhrenverstärker vor. 31 posts Previous; 1; 2; 3; kuDo Posts: 132 Joined: Tue Oct 06, 2020 9:29 pm Location: The Netherlands. The thin glass tube envelope is 20 mm diameter and excluding the B9A base pins stands 58 mm high. Unbalanced deflection would be even simpler, but it causes poor sharpness of the line (it would be impossible to focus the bean on entire screen, but only on part of it). It is also compatible with KT120 power tubes—if Hi all Finished my first guitar amp build. Final sale items are not returnable but they come with a full warranty. A recent customer comment: That went smoothly. KT88SE UL Amp project. Telefunken power tube is glorious and balance sounding, compared with the 300B amplifier. We build a guitar amp using television tubes. I introduce you to one of my tube amplifiers. P. The 269EX/369EX is a good choice for any amp using an EF80 power amp but it does not include a 5v secondary so if you want to use a tube rectifier use an EZ81 (6. This makes the tube stable as an RF amplifier and extends frequency response. If you are looking for a plugin replacement at a lower gain another IF amplifier in that rage earlier was the ubiquitous =EF80 used by the 1000,s in many old valve UK TV,s gain=7. 08 kB, 1012x1247 - viewed 146 Rob Robinette's Car and Tube Amp Website. | EF80 v. This is a 1 Watt push-pull pentode SLO-100, Overdrive Channel only with FX Loop and Switching deleted and laid out for a Princeton Reverb chassis. 45W vs. Radio tubes are valves. thank you Tube EF 80 or Röhre EF80 ID709, Vacuum Pentode, Noval, 9 pin miniature (USA pico-9) B9A and RF/IF-Stage shown. Third what are some variants that are direct substitues for the EF86 tube? spaceman Registered Lunatic. 2) = 0. 1948 EF42 EF80 Base: Loctal-9-Pin (B9G) (Codex=Y) Was used by : Military and/or Government: Filament: Vf 6. The only visible part of the valve is the expanded metal screening WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. FWIW -- I built parallel tube sockets in my prototyping chassis so I could EDIT: This tube seems to be remarkably mid and bass oriented for a small tube. You may need to check what range of g2 voltages is appropriate for the EF80. These tubes are ideally suited for use in tube microphones and various other audio applications.  Classic Tweed Bassman (early Marshall) tones from whisper to reasonable volumes with the post phase EF80 / 6BX6 TELSA. Improved version of EF80 with extended lifespan for use in telecom and broadcast. 00 postage. Information aus Funktechnik Nr. SANEI 211 SE tube amplifier with Hirata TANGO FW-150-10S, NC-14 * The PL36 needs a grid leak resistor. I'd suggest starting with the RobRob design and duplicating the EF80 tube setup so you have x4 (more depth to sound, same transformers). Nowadays it's popular for microphone amplifier applications. Apr 2, 2010 One amp uses tubes made by M. Email Password Confirm Password. Like 6AQ5s, the EF80s are still very affordable for NOS tubes. In mono mode the parallel gain stages are connected one after the other, which increases the gain and doubles the adjustment of the tone These big beasts of the tube amp jungle also feature 6H30 double-triodes as phase-splitters/drivers and bulbous KT150 output tubes, albeit twice as many as we find in the REF80S. Crack for clarity and speed and 339 for smooth tube tube warmth and musicality. EF80 = 6BX6 - nothing like the above - not pin compatible - like a 9-pin 6AU6. jpg; How Amps Work. New posts Search forums Subscribe. Heater of CRT and EF80 tube is rated 6. item 5 EF80 CV1376 MULLARD NOS VALVE TUBE EF80 CV1376 MULLARD NOS VALVE TUBE. Jun 1 A few of the tubes are labeled and boxed as Siemens. The third tube is a GD150M/S gas discharge regulator used in the alternative, and somewhat simpler HT regulator shown below. Matamp_style_feedback. Wharfcreek. After a while I gave up and exchanged it for a 6E5P, bought as matched pair for a low price. Parts arrived on time, now installed and working fine. Intended mainly as VHF amplifier for TV purposes, as well as This version of the amplifier uses the same basic EF80/184 circuit as above, but greater attention has been given to the power supply. The king of blackface amps, the Twin Reverb, produced 85 watts from four 6L6 tubes and had enormous power and output transformers, a non-sagging diode rectifier, and two powerful 12" speakers. 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 The BoyuuRange A50 MKII is one of the tube amplifiers I purchased to test with my own speakers. The 68k grid stopper on the EF80 may be rather high, unless this is intended to be guitar amp. In this video we bu In my experimental tube amplifier I have anode stabilization, because in the final stage there is a triode with very low internal resistance (400?, 6S19P). EF86とEF80は、名前は似ていて、どちらもシールドを持つMT9ソケットの五極管であるが、全く違う特性を持つ。EF80は、もともとは、テレビチューナーなどの高周波増幅に使われたもので、いまどき世界中で真空管テレビを沢山使っているなんていうこともないだろうし I have a bunch of NOS EF80s on hand and I’ve built several of single-ended EF80 amps based off Rob Robinette’s design with great results. 4mA/V. Price is for a Single Tube. One is labeled Amperex and the other Mullard. 11. 14', 'brand': 'TESLA Electron Tubes It's a classic designing of final amplifier 35 W, with two EL34 in push-pull, from the Siemens and Halske, with year of designing 24/3/1953 and code SV410/1. 5K:8 ohm is a near perfect match for a pair of EF80 in push-pull. I have the Turret Board populated and drilled out the chassis. The result is a three-tube design which is visually quite appealing (right), shown here with EF80 tubes. 31 posts 1; 2; 3; Next; kuDo Posts: 104 So with a small tube amp that would be much nicer to use. Have EL803 and EL803S versions in stock. This worked flawlessly from the beginning and does sounds pretty good. Re: EF80 based power amp for guitar. . 4; 5; 6; First Hi all Finished my first guitar amp build. 3 Ampere / Indirect / in 1938/39 by Philips in Holland. Durch besondere Fabrikationsmaßnahmen ist die Lebensdauer gegenüber normalen Typen stark verlängert, außerdem ist die Röhre brumm- und klingarm. Joined 2011. 8', 'brand': 'Tube Amp Doctor GmbH', 'list': 'Also EF80 based power amp for guitar. 2022-12-29 EF80/EL84 Audio Amplifier This is my latest micro amp project, the Bassman Micro tube guitar amplifier. The design lifetime is 10,000 hours. Po rt B/A0-7/D0-7. 49 zeigt für das Modell TX400-A die Röhren EF80, EQ80, ECL80, PL81 und PY80. The EF80 tube uses a normal 9-pin socket and 6. Home. I decided to use 300 plate volts which is the max plate voltage for the EF80 since most great tube amps run at or exceed the limit. Pentode for use as RF, IF, or video amplifying valve or mixing valve in television receivers. Please login or Hi. etc] can substitute the EF86 only after the whole circuit has been redesigned. Jun 1 I tried to build a SPUD amp with the high gm frame grid tube EL802 some times ago, but I was unable to stop HF oscillations. The amplifier it worked from 1954 until 1989, whenever it came also out except Power pentode for wide band amplifier made by Telefunken with diamond mark on the bottom. L. Welcome To the Hoffman Amplifiers Forum December 22, 2024, 03:09:44 am: Welcome, Guest Here's my tried and tested all small signal pentode low watt push pull amp. Forums. A grid leak resistor 'leaks' off unwanted DC (direct current) voltage on The Bassman Micro tube guitar amplifier is a compact practice amp that's moderately easy to build, 200, 220,230, 240 VAC 50/60 Hz primaries. 5751 Here's an absolutely fantastic sounding 5F6A Bassman "Micro" (Rob Robinette Design) desktop style amplifier that utilizes EF80 output tubes and puts out about 2 Watts in a 12" x 8" footprint. Quantity in Stock : 9 pcs Price : US$22. The Sylvania 6BX6 is a quality tube perfect for your application. It is one of the China made tube amplifiers that is highly acclaimed and reported to perform very well for the money. com). 26 x (251-4. Apr 3, 2010 Very similar electrode construction, with an overall screeening shield but the EF80 oddly has a taller envelope despite the internals being somewhat smaller. Simply, the EF86 is usually designed to run about 1 to 3mA (where it offers a slope of about 2mA/V). Rob Robinette Champ Micro EF80, a little speaker cab and a 10% power switch for late night action. Tube Amp Doctor This tube is mainly used as a broadband amplifier. The easy way to build this amp is to buy a 5E3 Deluxe small parts kit from Mojotone. Strange cabinet design. EF184/EF183 relationship, but the EF183 never EF184, EF95, EF80 [etc. The charge amplifier then converts the electric charge into a proportional Re se t. Later ECC88 will be replaced by ECC82. Go. ru: EF80: html page, MAZDA Valves & Picture Tubes Data, MK buizen handboek: Frank Philipse (Wildcat mirror - Jörg Jan Münter) There is more information available about tube power supply design in the Power Supply Design for Vacuum Tube Amplifiers article. Much used for RF, intermediate frequency, and video amplification. HELP 1-877 The EF80 internally screened pentode was a workhorse of the VHF TV receiver and was introduced in mid 1950 to replace the EF91. VVS: 3 ECC83. If you're looking at Third what are some variants that are direct substitues for the EF86 tube? spaceman Registered Lunatic. Voltage stage consists of tubes Hoffman Amplifiers Tube Amp Forum, Low watt p/p amp gallery . The 6HB6 is still available, fortunately. img-4351-0ff661c6f4. The second tube 6CC42 serves as a two-stage amplifier (Y). WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. The Bassman Micro's single channel preamp circuit was inspired by the 5F6A Bassman's Bright Hi channel. Here's is an absolutely fantastic sounding, freshly built, Champ Micro based off of Fender's legendary 5F1 Champ circuit. The push-pull EL84 tube amplifier schematic is from the book "Build your own Audio Valve Amplifiers" by Rainer zur Linde. EL153 \ EF80 is a very good performance of vacuum tube, many people can not properly use, resulting in the illusion of high frequency of inappropriate audio use. 0. Its designed as an IF amplifier not as an audio tube that's why its WORKING voltage is around =200V/200V I have never run it at its limit . For this the transformer gives 2x300V and I need 185V (some breaks the resistor and some stabilizer). EF86 - especially for Ike Chun EF80 based power amp for guitar. Various brands. I don’t know what it is about the Marshall 2204 circuit but when I built mine with 6V6s it was as loud as a 50 watt amp. EMM801---Rare preamp to be operated with LS8 or LS15 power amp. The preamp and long tail pair (LTP) phase inverter are 100% AB763 Vibroverb but the power amp uses a single, cathode biased 12AU7 power tube wired in true push-pull. Osvaldo de Banfield. bsrpi pxwmy nwid mblikem xncd gel sazvp caatbgc jdjf zmuo