Vox ac30 with el34. Undated, but probably drawn in early 1958.

This somewhat assumes your amp matches the schematic posted, or older AC-30 models. Grab one while you can . Sounds from classic marshall to hotrodded The amps encompassed are the AC2/30 of 1957-1958; the AC/30 (AC30 amplifier no. The Guide was originally intended for the use of service engineers, however it has also proved to be very popular with Vox AC30 owners and enthusiasts. 60 heads, the AC-100 did not provide storage space inside the head cabinet for the power cable. The preamp tubes were consistently one ECC82 (12AU7) tube and three ECC83 (12AX7) tubes. Depends on the model and era. Vox AC30 chassis late 1964 Fully working and sounding amazing completely original, clean example 7 NOS Ei Yugo Weld Plate 6CA7 EL34 ~ Nipple Top Holy Grail Triple We would like to show you a description here but the site won’t allow us. So far it looks okay, I'm horrid at soldering so some of it is a mess, but it all looks good so far, I'll keep posts going as I progress and may ask people for help if things go awry. May 25, 2020 · Hoffman Amplifiers Tube Amp Forum, Vox AC30 TB buzzing. pdf - 229 Kb 28: The Vox AC/30 - summer 1959 to early 1960. Vox AC30 vs Vox AC15: Notable players Aug 2, 2009 · I have an AC30 CC1 head I run into a 2x12 Avatar with Redfangs and its wonderful. 5k input grid resistors I circled the extra AC30 holes in blue on the diagram below The Vox AC30 amp is a British musical icon and here is a brief history of the 9 different models and we recommend the ones I believe are the best to own Feb 13, 2014 · The JSX can use EL34 or 6L6and there is see a differenceobviously. EL34 tubes are found in the classic Marshall JCM800. I had a lot of help on another forum. This second generation AC30/4 had two channels with two inputs, hence the "4" in the model name, and a single tone control, and was powered by a quartet of EL84 (6BQ5) power tubes, making it truly a doubling of the AC15 power amp circuit. Members; streamliner. Featuring a Brilliant and Normal Channel the AC50 takes the AC30s iconic sounds and beefs it up with a pair of EL34 adding a larger amp amp feel. 5', 'brand': 'Tube Amp Nov 10, 2015 · The Vox AC30 is one of the classic tube guitar amplifiers that shaped the sound of popular music. Dec 7, 2020 · Thanks for the replies. Jul 2, 2015 · The Beatles cut a deal with Vox in 1962, forever identifying the AC30 and its four EL84 power tubes with the early British Invasion sound. The Most Versatile AC30 Ever! The AC30C2 is the most versatile AC30 in Vox history! Plug into this Custom Series guitar amp and you'll hear what we mean. It uses 3 x ECC83(12AX7) tubes, one of which should be balanced and 4 x EL84 matched power tubes. Primary impedance: 4000 Ω  200mA ( 220mA Max. 25 Ecce 3 3LÆ. . It was billed as a "half-power" switch on a VOX "hand-wired" circuit I found from a few years ago (the model just prior to the current VOX AC30 Hand-Wired). Certainly, the late 1950s Fender tweeds and Marshall's JTM45 and Plexi amps are equally lust-worthy in the eyes and ears of many players and collectors, but JMI's creation is often discussed with an added catch of the breath, an excited charge in the air. That means the latter may be more susceptible to oscillating, and so bigger grid stopper should be seen as "normal". 19 posts 1; 2; Next; TESLA_EL34 Orange Master Posts: 1129 Joined: Tue Apr 20, 2010 5:23 pm Vox AC 50EL34 Sounds fantastic recently servicedGrab one while you can . There is an internal trimpot that sets the intensity of the vib/trem, which cannot be adjusted from outside the amp (as with a Fender amp "Depth" control). com T1 T2 SW1 J1 J5 R3 68k R5 6 8k R1- 2 1m HI (1) LO (2) AC-30 HAND-WIRED GUITAR AMPLIFIER. The EF86 was an integral part of the preamp (V1, Normal Channel) of the Vox AC30/4 - black panel, four inputs, TV Front and split front format, 1960-1961. the only thing they don't do so well is handle drop d stuff. Posted May 18, 2007. Though that does make for a little less natural "sag" when pushed, that does make them better as both a pedal platform as well as a workhorse bass amp. Jun 25, 2023 · Hoffman Amplifiers Tube Amp Forum, Vox AC30/4 head cabinet build… This is my Vox AC30 clone build. I have a Top Boost chassis all ready to go. A lovechild embraced by Jimmy Page of which can be heard on the 1999 record, Jimmy Page and The Black Crows ‘Live at the Greek’. 125 inches tall The only difference between the AC15 and AC30 is the AC30 has two more power tubes The AC30 has two more 100 ohm screen grid resistors and two more 1. Which version? The version Yeatzee is working on and the AC30-4 (may be called AC-34 with the EF86 normal channel and Vibrato channel). I want to make a nice sized 12 inch cabinet, or possibly make a head version of the amp. As is well known, AC30/6s used four: V1: one half each for the Normal and Brilliant channel input stage. Lead Vox engineer Dick Denney recalls on page 47 of his book, "The Vox Story," that Triumph Electronics, an AC-30 chassis subcontractor for Vox, developed a 50 watt power amplifier circuit powered by two EL34 power tubes that might be suited for use in a new Vox amplifier. The later MKII and MKIII models have 4 channels to meet the varied input needs of musicians. This would be preference rather than better or worse. Sounds fantastic recently serviced. About the Vox AC30C2 and AC30C2X amps: The Vox AC30 C2 amp first became available in early 2010. The VOX AC30 should have a health warning for tubes since I have yet to encounter a harsher environment to operate in. Tube life was not a problem, and I know this because I performed warranty service on Dynaco products back in the day. With that said, they’re noticeably closer compared to EL34 and 6L6. They sound like they are in the same family as an AC30 though a bit cleaner, but don't have that often overly bright zing that an AC30 can have with some guitars, and also take to humbuckers better than an AC30. C. Jul 16, 2024 · Vox AC30 Handwired Overdrived * PhD 18: Dr. OS/003. On top of that, it's fairly safe to say that Vox AC15 is a more popular guitar amp, based on its reviews. You are viewing a Vox AC-30 Hoffman turret board. . However, desiring a ‘copper top’ JMI AC30/6 head, I eventually sold the perfectly serviceable grey panel head and bought a Vox AC30 chassis dated to 1963 from Danny Handley in May 2015. Carlosraj. This version featured the same 1x12 speaker and square TV-front design as the AC15, but it used a pair of EL34 power valves rather than EL84s. Is there a tube amp that can be played at bedroom sound levels. Employing a quartet of EL84 power tubes, the AC30 Custom pumps 30 watts of remarkable tone through a pair of 12” Celestion Greenback or Alnico Blue speakers. My goal is to build a single-ended EL84 amp to sound as close to possible as a Vox AC30. I currently have a Marshall DSL40CR and even though the new guitar sounds *pretty good* through it, I keep thinking about the AC30's clarity and headroom (it sang). Output impedance: 4 & 8 Ω. Undated, but probably drawn in early 1958. The AC/30 featured four 12AX7 pre-amp tubes and a 12AU7. This variant would only last a year and would be replaced by the more recognisable twin-speaker model in 1960. So Vox AC15, while being a cheaper option, tends to get more favorable ⭐ reviews than the $2600 EVH 5150III 50W EL34, as seen on the chart below. were kept as close as "Few vintage tube amps have attained the gilded reverence heaped upon the Vox AC30. "The 6V6 is one of my favorite tubes. Some of the sheets originally came from Philips, others from Mullard. Material used & design specs. The EL34 powered AC30 was May 26, 2013 · CBS-owned used up 100 Blues in the AC30 around 73/74. output transformer 4x EL84 Class A, sec. I really enjoyed that build, and I'd like to start planning my next project. HI-FI amplifiers - the AC2/30 and AC/30 (both 2 x EL34 valves) The AC2/30 JMI-made Vox AC30s, 1959-1968. Vox AC30; Vox AC15; Vox Mar 15, 2023 · Hoffman Amplifiers Tube Amp Forum, Thread Vox ac30/6 + reverb don't open - Error Message AUDIO OUTPUT TRANSFORMER FOR TUBES AMPLIFIERS. With the Beatles in mind, Vox hurried the first AC-50 amps to completion. Our Vox tube replacement kits are designed for your amplifier and come in different option levels ranging from Value to Premium to Ultimate. Jul 14, 2019 · So I unexpectedly bought a new G&L USA Legacy guitar last night and I auditioned it through a Vox AC30 at the store for an hour. However, the differences between amps that come with EL34 and 6V6 tubes are different. On AC 30 style circuits (read most Dr Zs, Matchless, Bad Cats) I find 1. pdf - 1162 Kb 26: Vox_ac301960. They are found in amps that are 50 watts or more. And I am again not sure what the two 33k resistors would accomplish. Welcome To the Hoffman Amplifiers Forum August 20, 2024, 01:23:20 pm: Welcome, Guest. Like the previous 50-watt companion to the regular EVH 5150 III 100-watt head, the 50-watt EL34 version costs less than half the price of its 100-watt EL34 counterpart and weighs just over half as much as well, but it delivers about 90 percent of the same Vox Tube amp schematics, Hoffman amps tube amp schematic library Vox_ac30. Well I've made some progress on my AC30 build. 6l6 are a bit softer and quieter. The best Vox amp for an iconic tube amp ton is the AC30. All of these amps are combos and put maximum stress on power tubes when it comes to physical vibration and heat build up. Note the two rows of plastic vents; the top hat knobs; lack of external voltage selector (re-positioned on the preamp chassis); and the Celestion T2056 alnico speakers Hoffman Amplifiers Tube Amp Forum, Hoffman AC30 Turret Board Dec 20, 2013 · Hi, I am looking for a good matched quartet of EL34/6BQ5 tubes for my Vox AC30/6 TP amplifier and I have some question anout: 1- What is the maximum bias Hoffman Amplifiers Tube Amp Forum, A really big project, Vox AC30/4 clone EL34. Paired with a Mesa Boogie and Fender Bassman, producer Butch Vig liked to drive amps to distortion rather than use external distortion and drive effects that affected the bottom end of the amp. Register of updates to the main pages, January to March 2020. An ideal choice for the home or the studio, the AC4 Custom serves up an array of authentic VOX tone through a Celestion 10” speaker and can even be paired with external speaker cabinet for more tonal diversity. Detail from the reverse of a flyer for the AC/15, early 1958. If he's looking for that "blizzard of nails" sound and sag, he's not gonna get it from an AC50. EL84 Tubes. However, the EL34-powered AC30 was short lived, and a new AC30 version appeared in late 1959. If it is wrong then it will be effectively a short across the HT, so things will get hot. Welcome To the Hoffman Amplifiers Forum August 13, 2024, 10:16:55 am: Welcome, EL34 World Tube amp Library page Hoffman Amplifiers parts catalog Hoffman AC30 LED www. Oct 5, 2020 · On the surface, an EL84 tube is essentially a “scaled-down” version of the EL34, providing lower output volume and having a lower headroom. Jun 11, 2024 · Kurt Cobain – Nirvana Nevermind. The AC30/4 has always been a bucket list amp. Physically, parts were designed to look similar to original factory units (where possible). jpg (235. Single speaker, 4 inputs, two EL34 valves; cathode bias. Others Applieds Tubes: 6L6GC Cab: Vox AC30 212 2×12 open back; 6V6 – Groove Tubes, Marshall DSL 100 – EL34 – Mullard Tubes, Marshall DSL 20HR – EL34 – SED Winged C Tubes, Marshall EL34 Vs 6V6: How Do They Compare? These days, the whole American and British division is a bit outdated. The AC30 in a new format: its EL34 | 6CA7 | KT77 Tubes; EL84 | 7189 | 6BQ5 Tubes; This is a great "bang for the buck" retube set for the Vox AC30 Custom (AC30C2 and AC30C2X) tube amp. Introduced in 1958 by Vox, the original AC30 amp featured 30 watts of Class A power into a 12-inch Goodman 60-Watt speaker. Great for Guitar Tube Power Amplifier Vox AC-30 with 4x EL84. I'd like to do something a bit different. 2) of 159-1960; and the AC30/4, first issued in TV Front cabinets. 34 are a bit more agressive and much louder. Based on the classic AC30 design, the exciting new AC30C2 offers two channels - normal and top boost. I'm building the Hoffman AC30 as a head unit. Here's my first pic of the board, after soldering the main components. PUSH-PULL CLASS AB Pentode PUSH-PULL Class A (4x EL84 for Vox AC-30). Choke 100mA, 19H, 500 Ohms for almost all "JMI Product" and "VOX Product" AC30. Z Z -Lux * High Gain EL34 V2: PG Original * * Paul Arch: Paul Reed Smith Archon 100 * * Vox AC30/4 - Mullard EF86 preamp valve. I have never seen a . '3CK Son TED MOO. Buy the book here! The Guide has new schematics, layout drawings, photographs and parts lists for the Vox AC30,Vox AC15,Vox AC10,and the Vox AC4. There is a note on the schematic that states '12. Oct 23, 2019 · 今回は真空管アンプのとてつもなくデカイ音量にお困りの方にオススメの改造のご紹介です！言っちゃえばマスターボリューム増設なのですが Jan 17, 2021 · VOX AC30 CC2. May 23, 2019 · Share this: The Vox AC30 is a guitar amplifier manufactured by Vox. 1uf in the Top Boost section of a Vox AC-30. The AC44 is the best Vox amp that was never made! We took the AC10 and ran it thru an EL34 Power amp and the result is all the chimey AC top end and break up but with the heft of those EL34s. Unfortunately, back in the 80s, I used my old '63 Vox AC30/6 as a platform for various silly overdrive / channel switching mods. You can get a Bad Cat pretty cheap and for the most part they're 99% the same as a Matchless. I always ran with the standard cathode resistor, in fact it might have even been a 47 Ohm. 6V6 would be somewhat of a blend. Vox AC-30 (Orginal Jennings) Amplifier Schematic 12AX7, 12AX7, 12AX7, 12AV7, EL34, EL34, EL34, EL34, GZ34 (Dated 1960) ($20) Vox AC-4 Amplifier Schematic Aug 13, 2023 · I am thinking of building a Vox AC30 clone using the Hoffman layout, and I have a couple of questions. Master Volume along with a Cut control are a must. The amplifier has an HT of 400-430v, and a pair EL34's in cathode bias, a cathode resistor of 470ohms on each valve. Characterised by its “jangly” high-end sound it has become widely recognized by British musicians and others. Play around with this to determine if the change in tone is worth replacing your tubes every 6 months instead of every 4--assuming a busy gig schedule. So not too long ago a fellow amp enthusiast friend gifted me an AC30/4 repro chassis after seeing my AC15 twin build. While the 30 watt AC-30 (especially the "top boost" models) had an abundance of treble, these amps were no longer loud enough. ) Jul 2, 2024 · This is a three-member family of pedals inspired by the company’s Copper amplifier voiced after the Vox AC-30. I've been meaning to rebuild it back to stock for a while, as having fixed a few up, I love the Vox vib/trem effect. Thought I'd share some pictures and ask for comments. For guitarists looking to have a very versatile amp with many different tones then the Vox Valvetronix (VT) is the best choice. A 1960s gray panel Vox AC30 Top Boost—the EL84 is commonly associated with the British sound of Vox amps. Unless he's planning on playing a huge theater, the AC30 is too much amp for most indoor venues. Jan 28, 2019 · VOX AC30 C2 DEMOCheck out the Vox AC30 C2 Here:https://amzn. Vox AC30, AC15, AC10 and AC4. Danny is a professional musician and plays with the modern incarnation of The Animals: The Animals and Friends. The amp used a GZ34 tube rectifier, three ECC83s in the preamp section, and EL34 tubes in the power amplifier. 6V6 and 6L6 are "low-ish Gm" when compared to EL34 and EL84. Welcome To the Hoffman Amplifiers Forum August 23, 2024, 05:44:12 pm: Welcome, Vox AC30 VREV Schematic Vox AC4 Schematic Vox AC50 1 Schematic EL34 Tube Reviews; EL84 Tube Reviews; 6V6 Tube Reviews; KT66 Tube Reviews; Join Us. 6. AC30/6TB   NEW VERSION, WITH SHROUD!… The tube complement reveals the most important difference between this early AC-30 and later models; twin Mullard EL34 power tubes instead of the usual four EL84s. (EL34) Good for Hiwatt, Dynacord and a few other relics. The chassis is now done, except for mounting the choke, OT and PT and cutting the hole for the OT through the top as well as the screw holes for mounting all three. The board is populated with ZoSo capacitors, carbon comp resistors and metal resistors in the power section of the amplifier. High transconductance (Gm) tubes, like the EL34 and EL84, will have bigger changes of plate current with a given grid voltage input than lower-Gm tubes. output transformer for the VOX AC15 REISSUE from UK Production. With my second channel, my clone will get more gain than any AC30 and still has that super nice clean sound these amps do so well. What I'm looking at is the Vox AC4 (V-1-1). Please login or Jan 1, 2022 · If he buys a VOX he'll have a VOX. The data sheets on this page come from the third volume of a three volume valve (tube) and semi-conductor manual issued by Amperex in 1965. My goal is to make this amp as close to a JMI 64 or 65 Top Boost model. Welcome To the Hoffman Amplifiers Forum August 21, 2024, 12:28:20 I just finished building an EL34 SET stereo hifi amp - my first ever - that works and sounds great. Vox initially offered a 1X12" version and subsequently introduced the 2X12" AC30 Twin, which solved the volume problem at larger venues. JMI-made Vox AC30s, 1960-1968. Inductances measured at rated D. It's not the AC50 or the AC30 its something new! Cleans up incredibly well and has 4 voices, Normal, Bright, Low Cut and MIDs! Jun 18, 2023 · Hoffman Amplifiers Tube Amp Forum, variable cathode resistor install question for vintage vox ac30. The Vox AC-30 has a tone that resonates with people, from the jangly tones of early Beatles recordings to Brian May’s epic wall-of-Vox lead and riff work to the vocal, funky jazz fusion of John Scofield. Those for the GZ34 are dated 1958. Member. Output is a nominal 30 watts. Please view my other auctions for pictures Sep 29, 2016 · Made famous decades ago by the Fender Deluxe Reverb and Vox AC-30, respectively, the demand for low-powered, practical amplifiers opened up a world of creativity for designers such as Bartel. Use our extensive knowledge, experience and customer feedback to select re-tube packages that will work great in your tube amp. I bought a player series Cub 40 since the oldest Ac30 designs actually had EL34's and for ~1300 dollars I'm very happy. Apart from the phase splitter, the tagboards were pretty much stripped of the original components. Click on the images below for larger downloadable versions (around 3200 pixels wide). 1960-67: AC30/6 launched with 1 x ECC82, 4 x ECC83 (one balanced for the phase inverter)), 4 x EL84 and 1 x GZ34 (3 channels 6 inputs). EL34 . 5. The charred area of tag board may be conductive and needs to be removed, cut out or the board replaced. ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': 'output transformer for VOX AC120, 4x EL34, 4 Ohm', 'id': 'AC120A', 'price': '139. 2 A overall, or 50 mA per tube. Vox claims it is biased into Class A. current. Something about the chime and grunt of a cranked EF86 amp is just magic. It used EL34 power tubes, a tube rectifier, and EF86 preamp tubes, which were known to fail from vibration fairly often. Tube amp and not a class A EL84 amp that sounds like a vox ac30 but like a Marshall. Top goosr SEE "/cto. You cannot set the bias, per tube. For beginners, the Vox Pathfinder is the best choice as it is inexpensive, easy to use and produces a good tone. 36 NORMAL k S OSC D. It was introduced in 1958 to meet the growing demand for louder amplifiers. In the search for the essence of the classic vintage AC30 amp sound, we conducted a detailed analysis and study on mint condition AC15 and AC30s from the 1960s to truly uncover and understand the inner workings of these legendary amplifiers. Dec 27, 2017 · Fortunately, guitarists didn’t have to wait very long for EVH to follow up with a 50-watt version—the EVH 5150 III 50-watt EL34 head. I have heard of over 90 watts peak seriously stated from an AC30, they easily can blow their speakers. I measured some phase shifts through the system, but it is hard to value this for me, because I have no reference. Excellent replacements in vintage VOX AC-30's and the like, our EL84's are used by Fender, Crate, and Peavey. These vacuum tubes provide excellent tone at a reasonable price and the most popular combination recommended by customer feedback. Note, however, that JMI began advertising (and presumably selling) the AC/30 from the summer of 1959 - see this page. We’ve been supplying tubes for over 20 years. Show More. I'm linking my google photo album of the build so far, Let me know if anyone sees any major issues so far, I've not yet started soldering The Vox AC30 is a guitar amplifier manufactured by Vox. That these examples span such different points on the musical spectrum is a testament to the Oct 1, 2023 · Vox AC30/4 build finished…. The EL84 can almost be considered a scaled down EL34. I have just sold my AC30, but with JAN Phillips NOS tubes in it I gigged regularly for years on the same set of power tubes. Fast forward to today, and the Vox AC30S1 is a single channel flavour of a true British classic. to/2RTtDH5Hey Guys! Thanks for stopping by my channel! In this video I'm demonstrating the AWESOM P ictures of "Vox Sound Limited" AC30 Top Boost Reverb, serial number 25933, printed circuit board, produced c. The cabinet is small and cheap. 91 kB, 2212x1473 - viewed 880 times. It seemed real interesting so I looked at it further and saw that it is a 2 channel. While it is common to see them in the same types of amplifiers as an EL34, the EL84 is also commonly used in amplifiers with a Class A design, such as the Vox AC15 and AC30. MAINS Transformers for the UK at Marshall made VOX® AC30TB and AC30TBX,  Reissue, Model Nr. Oct 2, 2007 · The Vox schematic calls for 10 volts at the cathode resistor, which is a bias current of 0. 1972 in the Birch Stolec factory in Hastings/St Leonards-on-Sea. Aug 21, 2023 · I would love to have a hi-rez scan of that AC-30 schematic from your Jim Elyea book. os 065 gov ass too v VOX A'. The power section has 4 x EL84 (V3-V6). The EF86 was now dropped as they JMI-made Vox AC30s, 1959-1968. This cosmetic was a departure from the split vinyl/grill design used on all Vox amps since 1961. They sound good but they do blow with expensive regularity. While the amp's output provided larger sound than the Vox AC30, the tube design called for two EL34 output tubes to achieve the power needed for tonal clarity. These Note, however, that JMI began advertising (and presumably selling) the AC/30 from the summer of 1959 - see this page. Vox AC50 Classic Plus 50w head is a EL34-powered line-up that marries the classic VOX tone of rock n roll legend to versatile high-gain that does it all- Review Next was the Vox AC-30/6 Bass model in 1961. As is well known, AC30/6s used just one: V8, for the modulation of the Vib/Trem circuit. While not a conventional high-gain amplifier, a Vox AC30 was used on the recording of Nirvana’s seminal record Nevermind. Re-tube your Vox AC30 Custom AC30C2 and AC30C2X Amp with our specially selected vacuum tube sets. May 18, 2007 · Best EL84 for a Vox AC30 Best EL84 for a Vox AC30. Newsletter Sign This set includes: (4) Matched JJ EL84 power tubes(2) JJ ECC83S preamp tubes(1) "Gain Balanced" JJ ECC83S preamp tube (phase inverter) marked with yellow "Balanced Triodes" Sticker Audio Tubes Direct is an Authorized Tung-Sol, Electro-Harmonix, Genalex, Mullard, Sovtek, Svetlana & JJ Electr The new circuit in the AC4 appears to emphasize different frequencies than an AC30. Hoffman Amplifiers Tube Amp Forum, Vox AC30 + EF86 channel in a different way. Below pages from the Mullard "Audio Valves" booklet of April 1954 relating to the EF86 pentode - specifications and characteristic curves. The AC50 Pack for ToneX seeks to capture the sound of a 1960s Vox AC50. output transformer for 4x EL84 Class A, sec. The AC-30/6 Bass model was found on Vox schematic OS/057 and the AC-30/6 Treble on OS/056. the el 84 30 watt range of amps (like my old orange ad30) just flub out and lose the balls Hi, I recently picket up the hobby of repairing my old amplifiers myself, then I got to the Vibr/trem channel of my vox ac30 nTB Bass issue. 1961 VOX AC30 – No top boost Mid 60’s VOX AC10 – Twin Fender Blues Junior Fender Pro Junior. This is a 30-watt class A all-tube amp. Based on the classic AC30 design, the exciting new AC30C2X offers two channels – normal and top boost. An early advert for the AC/30. pdf - 210 Kb 27: Vox_ac301978. Hoffman Amplifiers Tube Amp Forum, Master volume mod - AC30 Lead Vox engineer Dick Denney recalls on page 47 of his book, "The Vox Story," that Triumph Electronics, an AC-30 chassis subcontractor for Vox, developed a 50 watt power amplifier circuit powered by two EL34 power tubes that might be suited for use in a new Vox amplifier. Depending on how they’re hooked up, a pair of EL34s can put out over 50 watts, so it was decided not to risk the single speaker with a full-power test. I have never owned a vox amp besides the little modeling amp they have and have also never played one. Unlike Vox AC-10, AC-30 and T. Demo of my Vox AC30 HW2. On Nov 5, 2021 · Hoffman Amplifiers Tube Amp Forum, Vintage Vox AC30 - Primary Wiring Question. 1960-1961. Vox AC 50. They can also be found in modern amps like the Orange Rockerverb and the Blackstar HT Stage 60. Administrator; Level 5; Posts: 9938; wooot! Re: A really big project, Vox AC30/4 clone The EL84 and 6BQ5 (and EL34) were designed for ultralinear service. The EL34 powered AC30 was short lived, and was soon powered by a quartet of EL84 (6BQ5) power tubes, making it truly a doubling of the AC15. 1 530000000057 GOLDEN Logo golden "VOX" 2 *530000000978 FRONT BAFFLE Back veneer, front brown diamond cloth 3 530000000915 VOX Bronzing badge Black ABS Text bronzing 4 530000000056 12" SPEAKER Celestion AlNico blue 5 - SCREW M5*25 Black Round Head 6 530000000916 RUBBER FEET with steel washer inside 7 - WOOD SCREW M4*20PA Round Head For those who crave more power, the AC30 expands on the captivating sound of its little brother by doubling the wattage. I really don't want to build a 5F1, or 5E3, etc. Channel two gives the player the dual 12AX7 precision and crunch of a '68 Plexi. I think EL34 would like to have an answer to the question he put---As I told, some years ago, I compared the AC30 schematic with the 6v30 schematic and they were pretty close if not the same however Weber layout is a bit different from Vox layout, I don't know if Weber do that for particular reasons, but so it is K The story of Goodmans Midax horns in Vox speaker cabinets is tied into the English production of the AC-50 and AC-100 amp heads. Manufactured in the famous Reflektor plant in Saratov, Russia, these brand new tubes have been tested on the industry’s most reliable, voltage controlled testing equipment and exceed all manufacturer’s specifications. (294-310) Upgrade with 4, 8 and 16 Ohms!   2x… I can also make the AC15 board as an AC30 board The AC30 board is 15 inches long x 3. Most of the historical issues with these tubes occurred in guitar amplifiers like the VOX AC-30, which ran the EL84s well above their dissipation rating. Jan 12, 2014 · The output section of the Vox AC30/6 TB is push pull, cathode biased. VOX’s AC4C1 delivers the coveted sound of the AC30 Top Boost circuit in an all-tube, 4 watt Class A amplifier. Please login or Apr 12, 2006 · Like the thread title says. 5 Vdc across the cathode resistor, when the amp is outputting 30 watts into a suitable load. Jun 24, 2024 · Just like the 6L6 tube, the EL34 is a high wattage tube. Orange Amps General Forum. Feb 19, 2021 · 5. New for 2013 is the Orange Glow Cascade Gain Mode which adds "more than some" growl to this well refined amp. For some reason I never got around to EL84's This is a premium retube set for the Vox AC30 Custom (AC30C2 and AC30C2X) tube amp. Below pages from the Mullard "Audio Valves" booklet of April 1954 relating to the ECC83 double triode - specifications and characteristic curves. Cab: Vox AC30 212 open back; EL34 – Mullard Tubes, Marshall DSL 20HR – EL34 – SED Winged C Tubes, Marshall DSL 50 – EL34 – JJ Tubes, Marshall JCM 900 50 Vox AC-50 MK III 1965 production 50 watt EL34 tone machine AC30 / JMT-45 Vintage Beatle Era Sounds So which valves are used in Vox AC30 amps? 1959-1961: AC30/4 launched with an EF86 as V1, 3 x ECC83 (V2, V7 and V9), and 1 x ECC82 (V8). Choke - Hammond, Replacement for Vox AC30 vintage - Replacement for Vox AC30 vintage Inductance ± 15% 30 H D. It sounded SO GOOD. Best Vox Amps. 07:28:00 pm by EL34 This retube set for the Vox AC30 Custom (AC30C2 and AC30C2X) tube amplifier consists of the very best vacuum tubes we have to offer. Hoffman Amplifiers Tube Amp Forum, Mixing Circuit for EL34 , 6L6 Power Amp Stage Vox AC30 Modified Amp . I'd always been a Fender guy really, EL34 amps are way too bright for me at low volume, 6V6's break up early, I was coming from acoustic so I went with 6L6 style anps. The "Power" Switch that changes the power tubes' operation between Triode and Pentode modes seems to be working, but I was expecting a large difference (in volume) between the two. Apr 20, 2010 · Re: Vox AC30 C2 Post by Deacon Blues » Mon Aug 02, 2010 5:13 am ac30s are sweet amps. Mar 21, 2019 · Along with that vintage British power amp distortion, a second channel offers a creamy, classic voice; a Swiss Army knife of amplifiers, like the bastard son of the Vox AC-30 but with that earth-shaking Orange tone. The circuitry for the AC-30/6 Normal was detailed on Vox service schematic OS/065. Welcome To the Hoffman Amplifiers Forum July 27, 2024, 02:54:39 pm: Welcome, Guest. Moderator: bclaire. Below pages from the Mullard "Audio Valves" booklet of April 1954 relating to the ECC82 double triode - specifications and characteristic curves. Find our test results below: Power Tubes Tested: -JJ EL84 -Sovtek EL84 -Ei EL84 Preamp Tubes Tested: -Ei ECC83 -Penta 12AX7 -Tung-Sol 12AX7 A few caveats: Since the Vox AC30 runs power tubes extremely hot, we were only able to test EL84’s that Initially developed in 1959 for players who needed more power, AC30 quickly became the go-to amplifier for professional players in the UK. And I mean soundlevels at which you can still hold a conversation (60-70db ?). Other valves encompassed are the EL34, EL84, ECC82 and ECC83. By streamliner May 18, 2007 in Amps. V2: Phase inverter. The EF86, ECC82, ECC83, EL84 and GZ34, made by Mullard and Brimar, 1959-1968. hoffmanamps. They are bloody loud! Mar 25, 2022 · In spring 1959, the 1x12 30-watt AC30 appeared. Current 100 mA Features: Designed for drop in replacement of original units. 30. I very much like to check if all values are still in range. Circuit diagrams for the AC30/6 can be found on this page. Z Maz18 * PhD Lux: Dr. History VOX AC15 LIMITED EDITION RED W FOOTSWITCH Pair of EL84 tubes The Vox AC30 was originally introduced in 1959 at Hank … May 14, 2012 · The cap in 'vox 2' and 'vox 3' has got the positive end to ground, which is unlikely to be correct. If he's already playing through a Marshall Super Lead circuit, a EL34 powered VOX would (IMO) prove redundant. 2k before the split (@100 ohm) gets me screen voltages around 320v, the common schematic value for vintage Vox. Vox AC30C2 and AC30CX2 Tube Sets consists of 3 x 12AX7 preamp tubes and 4 x EL84 power tubes. This 3rd revision of the Vox AC-50 saw perhaps the biggest change -- a diode bridge rectifier replaced the GZ-34 rectifier tube that the amp used in 1964. Using channel one the amp delivers delivers that classic EF-86 British chime and growl of a classic '59 AC30. Note the large VOX letters, also seen on other AC2/30s but arranged diagonally in the upper panel, and the stylised foliage background of the panel itself. Sounds like pulling (or switching off) a pair of the power tubes will reduce the output power but since the entirely of the amp circuit (the OT most importantly) is designed for the 4 tubes, the sound (as compared to an amp/OT designed for a single pair) will not be what one might expect for a "true" AC15. 4+8+16 Ohm, 30 Watt, for VOX AC30 of  60s +70s   WITH EXTRA 4 OHM WINDING   Due to… Vox AC30 website. The Tung-Sol EL84 / 6BQ5 was a popular OEM tube for American-made EL84 / 6BQ5 guitar amplifiers, such as those built by Gibson and Harmony. Feb 21, 2023 · This '59 original featured the same 1x12 speaker and square "TV-front" design as its sibling, but it housed a duo of EL34 power valves rather than EL84s. Vox enlisted a modified an AC-30 speaker cabinet to accompany the new AC-50 head. Feb 24, 2020 · Hoffman Amplifiers Tube Amp Forum, my first build - Vox AC30. Start new topic; Recommended Posts. Also called the AC30/4, it featured one 12-inch Goodmans 60-watt speaker and two channels with two inputs each, which explains the “4” in the model designation. The olde AC30 was a "46 watt" amp nevermind the %THD, watts don't care about distortion. To me the AC50 has a sound that is best described as an AC30 meets a Marshall Plexi. ). Thread starter Carlosraj; Start date 2021-01-17 12:25 pm; Jump to Latest C. Jan 12, 2014 · I recently retubed our Vox AC30 and happened to tube roll a few different preamp and power tubes. This cabinet would be covered, full face, with brown Vox grill cloth. Vox introduced the AC-30/6 Treble model in 1964, after the "British Invasion" of America was in full swing. AC2/30. You will notice that, in all settings, EL34 is darker. Due to its rugged construction and conservative ratings, it is the most reliable current production EL84 type available for use in Vox AC-30 type amplifiers. Perfect Replacement   Custom made by Dagnall in Europe for… Oct 13, 2018 · Vox JMI AC30 Tagboard Layout 10-13-2018, 05:25 PM With the misdirected zeal of youth, I'm afraid the tagboards in my old 60s Vox JMI AC30 got stripped of the original circuitry and repurposed for various overdrive / channel switching mods back in the 80s Index page for the valves used in Vox AC30 amplifiers - the AC/30, AC30/4 and AC30/6. (I have a Vox AC-30 style chassis that is being offered in a separate auction. This is also labeled "470k preset". In the schematic you linked, it is "RV1" between the two halves of V11. 8+16 Ohm, 30 Watt, for VOX AC30 of  60s +70s   modelled after a Wooden 76853  … Vox AC15HW1 and AC15HW1X Amp ; Vox AC30 Custom AC30C2 and AC30C2X Amp ; Vox AC30 Custom Classic Amp ; Vox AC30H2 AC30H2L, and AC30HH Heritage Amp ; Vox AC30HW2 AC30HW2X and AC30HWH Amp ; Vox AC4C1 AC4C1-12 Amp ; Vox AC4TV and AC4TVH Amp ; Vox AC50CPH and AC50CP2 ; Vox NT15C1 Amp ; Vox NT15H - Night Train Amp ; Vox NT15H-G2 Amp ; Vox NT50H-G2 Amp Bad Cat is where Matchless designs went the first time they went under. The compact pedal version the Copper V1, was designed in collaboration with Adrian Thorpe of Thorpy effects, and it’s a simple amp-in-a-box with controls for Volume, Gain, Bass, Tone and Treble. This necessitated the use of a detachable power cable. The AC30C2X is the most versatile AC30 in Vox history! Plug into this Custom Series guitar amp and you’ll hear what we mean. The cathode resistor sets the overall bias of the four tubes. Discontinued in 1960, it was superseded by the Fender Twin-inspired AC30 Twin model earlier that year. i love that tuning and write a lot of stuff in it. I was looking online today and came across the vox ac30 handwired head. This amp apparently had two bronze "Jennings" labels - one underneath the VOX logo and one on the side. i want one for those shimmery British low gain sounds. Vox made a rather curious choice of cabinet and cable connectors for this power cable, a four-pin XLR jack and plug.   Replaces TXOP00008. qvx qvlc lhqrh jdiibh fxboj rpssxa cwyz acsiv ebdo jlcaalz