Vox ac30 mods The amplifier is modified to JMI era specs, and has been upgraded with the following components by Lyle Caldwell at Psionic Audio and Don "Toneman" Butler: - Mercury Magnetics ToneClone VXO-30W Output Transformer I found initially that the treble is ear splitting and tricky to tame. Circuit Analysis Of The Vox Ac30 Silver Jubilee. This is a consignment item. Here's an interesting quote from him: Mar 23, 2008 · Pre - Vox AC30 con mods. All readings in the attached chart are with all knobs fully CCW (at 0). Mar 11, 2016 · There are a few mods there that are purely because it's a very early run cc2 and they got fixed later in production, like crap tubes, wrong fx loop cap value (schematic typo), trem speed, hardwired speakers, the rest are gravy. jpg - 169 Kb 43: Vox_ac30_poweramp. The hand wiring is very good. What kind of suggestions does Sep 28, 2020 · That being said, my favorite recent made vox inspired amp I’ve tried was probably the Tex EF86 I used to own. AC30 Dec 3, 2015 · A complete history of Vox AC30 is a story for another day, but Korg bought Vox in the early ‘90s and these reissues became some of the most consistent, well put-together, and sought after versions of the amplifier. Nov 20, 2011 · sickman82 Breadboard Brother Information Posts: 98 Joined: 16 Jun 2011, 19:12 my favorite amplifier: Vox AC30 Completed builds: BYOC OD2, Lovepedal COT 50, Lovepedal Kalamazoo, Zvex Fuzz Factory, Zvex Wooly Mammoth, D*A*M Meathead, EHX Green Muff, EHX IC Muff, Gary Hurst Tone Bender MKI, Fuzz Face (Ge & Si), Catalinbread DLS MKI, Black Arts Pharaoh Apr 16, 2014 · NORMAL Channel: Either a Vox AC30 Normal channel with added bright Switch. They all have peculiarities. RE-20 was the only real effect as the reverb in the clip is all the amps. Mods For The Vox Handwired Series Amps Carl S Custom. Three ECC83 tubes power the preamp. 2 channels: high gain + vox clean; for any tube based vox - no drilling required; ac30 high gain brown mod demo: about us; I'm a blues/country/rock player seeking that magic Vox sound, and need a little guidance regarding the various iterations of the classic ac30. I'll attach the layout, PCB, and schematic for reference. Aug 20, 2013 · http://www. The AC30 heads of this era came in 3 versions, Bass, Normal and Treble. The ones in the library are a pain to read. Jan 14, 2020 · Hi everyone, new member here. Para mi segundo proyecto valvular decidi intentar hacer el pre del VOX May 2, 2011 · Vox AC15C1 Choke Mod. Designed by Steve Grindrod (SG) in the UK, the amplifier was endorsed by Brian May. All mods are in red to easily identify the changes (and leave the schematic useful for troubleshooting a perfectly normal amp too). but I think it could be better with some tweaks and some good tubes. html Nice page. Jul 28, 2010 · Before buying, consider whether you need the extra volume and channel switching. The amp was built in China to save on manufacturing costs but was dogged by problems from the beginning. The AC30 was the product of the furtive mind of Dick Denny, and Vox debuted the amp in 1959. 但是，不应轻视 Vox AC15。这个放大器，最初被称为Vox AC1或AC1 / 15，参考功率瓦特，是这一切的开始。这是爱上团队汉克·马文从 该阴影，谁，需要更多的功率，与之交谈 迪克·丹尼，Vox的老板，让他们的东西比AC15大，从而产生了Vox的AC30。 They were the AC-30 "Normal," the AC-30 "Treble," and the AC-30 Top Boost. Vox Ac30 Vrev Sch Service Manual Schematics Eeprom Repair Info For Electronics Experts Jan 8, 2012 · Note that the old Vox AC30 circuit was designed around the components of the day, the new Vox's have different transformers and modern tubes so just matching some of these components to the old values will not always result in what you expect. If I want to add bass, I have to turn bass up, turn cut down, then go back and turn treble up. I'll start off with the Custom Classic series. May 25, 2020 · I have a Vox AC30 TB, it was misbehaving and was diagnosed with a faulty output transformer, this was replaced and the amp serviced, it recieved some new caps resistors and tubes, the work was do e by a competent engineer but he's not a vintage amp guy. Otherwise, it was a great sounding, easy to use amp. May 20, 2014 · While Lyle's professional service would probably provide the ultimate amp to any AC30 owner's specifications, here is my experiences with some of the basic modifications to make my AC30 better to my own tastes. com/forums/squawk-box/127243-vox-ac30-custom-classic-common-issues. The Alnico Blue speakers are renowned for their warm lows, mellow upper-mids, and brilliant bell-like highs, making this IR ideal for capturing the Dec 6, 2017 · I recently traded up from my trusty AC15 to an AC30CC2. This would be a great option on the used market. JUST IN: Vox AC30 Custom C2 in Very Good condition!This Vox AC30 Custom C2 has undergone over $1000 in mods by Psionic Audio that expertly reproduce the majesty of the 1964 JMI Vox AC30. vox ac15 + ac30 mods. I would like to be able to switch from 100% Brian May spec to 100% stock Apr 28, 2019 · Introduction. the EF86 preamp channel, which VOX phased. I liked how the z worked and I liked the frequency ranges on it. The modern amp sounded utter toilet in comparison - bright, fizzy and generally unpleasant - therefore these mods look very appealing. The first hybrid module of the MTS world! This mod combines the VOX® AC30 and Matchless® DC30. Note: these amps have all been modded to the actual early '60s JMI circuit with the mistake Oct 25, 2011 · my favorite amplifier: Vox Pathfinder 10 Completed builds: • Honeytube (Danelectro Honeytone tube conversion); • M014 (self-split push-pull 6P14P amp); • Vox Pathfinder 10 (soft clip & top boost mods); Location: Brazil Has thanked: 2 times Been thanked: 17 times I installed this Hall VVR the 1st version of this mod , let me first say it was a very easy install , and that's where the fun ended lol This mod is worth the $30 but not a penny more a PPIMV would be a better mod for this. I got it from a friend for cheap as it needed a little work but I've rectified the actual 'issues' - new cliff input jacks, cts pots and new cap cans (f&h This is a used amp in good condition. Psionic Audio specializes in modifying "reissue" Vox AC30s to the specifications of the great-sounding JMI era of the 1960s. Thon Live Case Vox AC-30 w. In general, I am getting some pretty hit-and-miss results, but these were some of my better ones. We put a normal 3PDT switch under the battery cover so it looks the same. _____ When I turn the Brilliant pot up, pin 1 on all tubes have a decent voltage swing. 923 Posts: 2202 Joined: Sat Mar 19, 2011 12:40 am Location: Melbourne, Australia Based on a '66 Vox® AC30 Top Boost ( Mod). Free Shipping. The LAST one! - UK made Top Boost add-on unit for vintage Vox JMI AC30 AC15 AC/30 AC/15 amps. pro snake Patch Angled Jack 0,15 m. Finally be sure to check out my mod guide on the Vox AC4TV! UPDATE 12/12/12: Vox AC15 with external 1×12 cabinet (the acoustic is a 1974 Japanese made Martin Sigma DM5 – it sounds as good as a Martin D-18!) Oct 21, 2016 · Vox Introduces the Custom Series with AC30 and AC15 Models › Boom Boxes: 5 Amps That Define the Music We Hear—and the Gear › Vox Heritage Collection AC30H2 Review › Ignore a Modern AC30's Standby Switch? Mar 10, 2011 · Hey All, I have a Vox AC30 6/tb. Nov 5, 2009 · If I were in the market for an AC30, and one day I will be, I'd go like this: -Buy an AC30CC head unit. Oct 14, 2006 · This is the latest iteration of the AC30 from Voxno choke or rectifier tube, normal and top boost channels, shared tremolo and reverb, master volume and an effects loop. Completed amps from Fender, Orange, Hiwatt, Vox, etc. I have a lot of previous experience building all types of pedals and even very complex guitar wiring. Pro: Simple to implement Jul 14, 2012 · Again, the cabinet materials are meaningless unless you're Brian May. The VOX AC30 that this Cut Control is taken from does not have a negative feedback loop. Based on VOX® AC30 and Matchless® DC30 amp. Does anyone have one of these AC30s, and has installed some sort of Mar 4, 2009 · His Vox AC-30 is a vintage '62 model he bought at the Arlington Guitar Show. If you are handy with a soldering iron google “Lyle Caldwell ac30 cc2 mods”. rtf), PDF File (. I like the sound of my Vox AC-30 CC1 head and cab with the Wharfedale speaker and feel no need to mod it other than maybe putting NOS tubes in it one of these days. Benefits of this mod are better compatibility with overdrive/distortion pedals and increased Feb 26, 2013 · -Modified AC30's cleans and crunch sounded more like a good vintage AC30. Grosvenor whose I own the AC30 Service Engineer's Guide (which is very useful for a AC30 builder like me). out during the transition to the renowned. I have a Vox ac10 cc1 amp. com. 14, and other high quality audio effects and custom audio solutions. Thanks. The B channel is a mix of vox and (most) Machless amplification with an EF86 tube. Aug 23, 2015 · Also, AFAIK, the Vox AC30TB model in the AXE has been corrected by Cliff, and it will NOT behave or sound like the real AC30TB because of this. Vox AC30 Reissue "JMI" Modifications. Sep 2, 2011 · If you have any questions or suggestions please don’t hesitate to ask. Resistors and caps across the board have been dutifully replaced with vintage spec components, the stock Chinese Mod 2 - AC30 tonestack mod: (Original vintage tonestack setup for AC15/30) This one is a little tricky, since there are no spaces on the board to solder a jumper wire off the bass tone pot. This document provides a circuit diagram for modifying an AC30 CC amplifier. The Vox AC15CC "custom classic" amplifier is a modern tube amplifier introduced by Vox in 2004 and discontinued in 2010. Jun 11, 2014 · The 90s AC-30TBX is very close in sound to a 60s AC-30. Oct 6, 2013 · 5. Jan 17, 2016 · I´m looking for Philips red colour NOS condensers and Erie NOS resistors for a Vintage JMI Vox AC30 Top Boost restauration. Therefore, a master volume is really recommended. It may or may not be of use/application for other series Needed: - Soldering experience and a soldering iron - Desoldering wick (optional) You might have noticed that the AC30 is kind of a bright amp with lots of high frequenceys. In this case these old tubes didn't add any mojo, they only made the amp sound worse. Jul 2, 2010 · AC30 CCH with a Century V30. Aug 21, 2023 · The version Yeatzee is working on and the AC30-4 (may be called AC-34 with the EF86 normal channel and Vibrato channel). So any AC30 should have Celestion Blues (or one of the cheaper cloned alternatives) and it will improve the tone noticeably, whether it's a C2 or a CC2. In addition, A-channel has a really clean channel behind the lever switch too. Price: 219$ Price including module: 399$ Price excl. It sounds better than my 30 being run low or bogged down by an attenuator. Im Januar 2022 haben wir die Webseite des AC30-Guide eingestellt. Jan 17, 2018 · I had my AC30 moddet, so it sounds better with drive pedals Mar 5, 2019 · Statement vom AC30-Guide blog: Seit 2011 betrieben Moritz und Jens in ihrer Freizeit den Blog AC30-Guide. I guess I will just have him put some stiffer pots in if they’re purely operational with no tone affect. If you don't, you could save a little more with Vox's Night Train. There’s been quite a few mods - even I made a few 20 years ago. This amp has the Butler Top Boost Mod This is a 1964 AC30 amp head. g. The treble version has proven to be the most desirable am Estimated Value for Vox AC30/6 TBX 3-Channel 30-Watt 2x12" Blue Alnico Guitar Combo 1994 - 2004 on Reverb. Highly recommended amp if you can get one used and then add the mods listed. In 2024 we finally started doing TRUE BYPASS mods. Feb 26, 2013 · The mods are discussed in detail here: http://www. I love my AC-30. Therefore, It just does not sound the same. I’ve watched a few videos because I was initially going to perform the swap myself before I realized an Ac30 is too expensive for me to cut my amp tech teeth on (also don’t want to kill myself on a capacitor 🤣)and they show bias adjustment. As far as circuit mods go, the normal channel is quite easy to make brighter - IIRC the original non top boost "Bright" channel is basically the same basic circuit as the normal channel, but with a smaller coupling cap, a bigger bright cap and a smaller cathode bypass cap on V1 so it has less gain at low frequencies. It is PCB, but the one with 2 thin boards with the components set up in an accessible fashion and panel mounted pots. Mar 27, 2013 · With the vox, I have to mess with the interactive bass and treble. Replacing the output tubes did the trick. I recently have been digging down the rabbit hole of upgrading and modding amps. It was showcased a while back but first I've seen of it. Jun 4, 2023 · Came across this web page while looking for an AC30 top boost channel schematic: https://www. A unique feature is the completely rewired tonestack. I improvised something that works well. The Vox 2x12" cabs with Chinese Blues are pretty bloody horrible. I have done all of the mods, takes some of the shriek out of the treble and increases pre amp gain to make it dirtier at every volume setting. time, the EF86-driven preamp channel from. An amp's negative feedback loop will "fight" the cut control so this tone control works best with amps with light or no NFB. The only thing I am going to add to the Hoffman layout is a Type-2 PPIMV. In the US, somewhere like Avatar, Mojotone, Lopoline, whoever you want. The Vox AC30CC1 was a short-lived model in the Custom Classic family of amps. I've maybe played it only 20 - 30 hours since the modifications. Now on to further mods. Option 1: Taklen from the Vox AC30 CC series. Valve Reactor technology hasn't slain the all-valve amp, but we are impressed. 34 - EF86 channel (with the bright switch) and a paralleled 12AX7 instead of the EF86. Ignore the combo and save your back -Carry out the bright cap mod. They’re loud amps! Apr 23, 2023 · I have put together some all-in-one (not IR/cab sim needed) captures/profiles of a Vox AC-30 at edge-of-breakup using Helix Native. First, I'm not slagging this amp. I still have the amp but changed the speakers to mid-sixties silver Alnicos which are brighter but less efficient. The tubes are Ruby and Sovtec. Nov 1, 2018 · If you want Vox tone, including the classic breakup and compression, the AC15C1 is significantly lighter, smaller, and more manageable. The Vox AC15 and AC30: bastions of British tone that defined a generation in sound. What do these do? What are they for? To avoid having zero resistance between the two lines? To solve a pot feel issue? I´m clueless. Also going to see if I Sep 4, 2021 · all-audio. One of the mods I did was insert a 1N4007 in series with each GZ34 plate - this is a common mod that is done nowadays to avoid any rectifier tube arcing - especially for this kind of standby switch operation where diodes are hot switched. In 2006 Vox (Korg UK) unveiled a new AC30 amplifier. My blog about VOX AC30CC1 modifications and recommendations about speaker, rectifier and May 20, 2014 · And a lot of mods have been published very well by Lyle Caldwell of Psionic Audio - all of the mods I mention in this article originated from blog postings from Lyle (THANKS MAN!!). Comes with Celestion Alnico Gold speaker, and the original speaker too. Mar 2, 2018 · Taking a look around the amp, we can see the white panelled Top Boost mod cut into the rear panel. ANGEL PB II A different Vox AC30 HW came in for our JMI+ mods, new Mercury Magnetic transformers, variable voltage, and some upscale switching options. The Vox Showroom Top Boost Circuit A Look Under Hood. This correction was done by giving some mids to the model. But that doesn't neccessarily correspond, with my "90's AC30" which although a firm remake of the original Dick Denny circuit, was made in the marshall factory, & the Vox name owned by Korg. But the 15 is the ticket for the volumes I play at these days. My second favorite recent Vox type amp was maybe the Savage Schatten (didn’t like the Savage Glas as much). Single channel, single speaker, single input, overdrive ,digital Reverb -but no tremolo. especially with delay and mods in the effects loop. It has mercury mag transformers the OT is the size of 4 quarters stacked together (not really, but close). It all depends. I did some mods to the scheme to eek out gain (have a build thread and pic of modified schematic) and a trem depth (which subsequently alters the ef86 bias). 972. It sounds great. Lyle Caldwell psionicaudio pisonic psyonic syonic sonic Triad 3. All electronics and transformers were first discarded from the amp head. I have a couple for a CD player that are 3V. I saw an AC30CC2X with upgraded MM transformers for $1000 a while back. Or an AC15 or AC. Hardly an AC30 from a purist's view, but I must say it sounds pretty damn good out of the box. Jan 24, 2021 · Even if you are happy with the stock amp, check this video for tips to keep your AC30HW in good condition. This Vox AC30 Custom C2 has undergone over $1000 in mods by Psionic Audio (JMI mod, Transformer mod, Power scaling mod) that expertly reproduce the majesty of the 1964 JMI Vox AC30. 99. Oct 23, 2023 · Vox AC30 redesign and 100% custom rebuild for 3 AC30s made for Brian May in 2005, which I later modified/upgraded in 2007: The Brian May AC30 rebuild used the Vox AC30 TBX UK made 1994-2004 series speaker cabinet and integral head chassis as the starting point. I can read schematics but prefer working off layouts when soldering as I get lost when reading a schematic! However, I Psionic Audio - offering the Triad, the new Telos, the 3. how would I go about utilizing this half of the 2nd Vocs May212 AlnBlu Cabinet IR: This IRs encapsulates the rich, chimey, and resonant tones of the Vox AC30 Brian May Signature 2×12 Cabinet, famously loaded with Celestion Alnico Blue speakers. I have a Top Boost chassis all ready to go. The AC30 does not have this cap. ACT COMBO. Vox AC30 Lyle Caldwell Mod - Free download as (. Vox, today a subsidiary of Korg, recently began making a high-end reissue of its famed 30-watt amp in several configurations, and offered to let us take a look at its latest – the AC30 Custom Classic (CC) with two 12″ Alnico-magnet Celestion speakers. The most important thing is the speaker (s) and Celestion Blues are the sound of Vox amps. 0047uF 200v cap connect the two phase inverter outputs. org. For more info, Sub Aug 29, 2021 · I noticed recently Vox have brought out a new version of the AC30. high gain brown mod. Nov 30, 2024 · After a lot of request, I've started design for a PCB for Vox AC30 style amps, with the aim to make it flexible enough to accommodate seevral variants (e. My goal is to make this amp as close to a JMI 64 or 65 Top Boost model. pdf - 17 Kb 44: Oct 16, 2011 · OK, I have built a really nice vox AC30 top boost amp. 220KA or 250KA pot (audio pot wired as variable resistor) and . I work on a lot of Vox AC30s, from the '60s to now. While Lyle's professional service would probably provide the ultimate amp to any AC30 owner's specifications, here is my experiences with some of the basic Jan 15, 2005 · Re: AC-30 Lyle Caldwell mods link. Vox was purchased by Japanese synth giant Korg in 1992 and has enjoyed steady growth ever since, returning the brand to the global market-leading status it always Dec 2, 2005 · VOX AC30CC Mod Schematic - Free download as PDF File (. Need to find a 3V wall wart (but it must be filtered, otherwise filter caps must fit in the box); I suppose it should be regulated, but not sure. VAT. The Vox Valvetone V810 is a great sounding pedal with true bypass, discontinued in about 2000. The cabinet is plywood and the backs are heavy duty particle board. So all I can do, is put up, what I diligently research as being my AC30 circuit in #3. We perform these mods on the following Vox amplifiers: AC30TB/TBX Series; AC30 Custom Classic Series; AC30 Heritage Series; AC30 Custom Series Fortunately some simple mods can many your handwired AC15 or AC30 sound and feel authentic and solve many of the tube service issues they have! 1. An amp tech in Memphis, TN started comparing schematics of the CC2 with the original JMI model and noticed several differences, as well as actual errors on the CC2 circuit board. Camera sound. This was done to prevent noise problems but make the amp sterile and harsh sounding. It also gives it more of a vintage character. 14 314 Z2 Lumos Fuzzy Logic fuzzylogic jmi vox ac30 ac30cc mod amp amplifier modification modifications mods mixers mixer electric guitar pedals pedal stomp box stompbox stompboxes effects effect distortion Mar 1, 2022 · Very interesting stuff - as I owned an AC30cc and was truly underwhelmed by the experience. Since the UK-made reissues of the 1990s, the brand has been continually evolving its solution to affordable-yet authentic new versions of its number one sons. Each channel has one input. It was designed to be a lighter, smaller alternative to the "full-blown" AC30CC amps, using a specially-designed "Neo Dog" 12" speaker which could handle the full 30+ watt output of the amp. Drawn by Dick Denney (DRD) and checked by him. Hey All, You might want to go with an AC-30 choke, they're rated close to 500 DCR at 100mA vox ac30 mods Recommend Articles. It certainly does run hot. This one is is a bit trickier to use as it has a ton of settings - Lyle's videos showing several of the issues this amp had: Psionic JMI+ Mods& Ground Loop Removal On Vox AC30/6: https://www. 192 likes. com mit Informationen rund um das Modding der AC15/AC30s von VOX und mit dazu ergänzenden Informationen. I came across the Lyle Caldwell mods for the Vox AC30. Jan 29, 2012 · I’ve experimented with all the mods on this page and feel that some of them get you closer to a 1964 AC30 “tone” (and some closer to the Brian May “tone”) but somehow for me, they come up short of capturing the Vintage Vox “FEEL” which to me is the Holy Grail of Voxyness. Restauration / Reparatur eines 1962er VOX AC30. After the mods. wheels. Responder Seguir este hilo Favorito #1 por ppaappoo el 23/03/2008. -Source a separate cabinet. It was sounding distorted on all channels when I bought it. VOX AC30 OneTwelve 1x12 30-Watt Tube Guitar Amp. Apr 20, 2010 · Vox ac30c2 . It sounds great, but is just too loud. If you have to pay a tech for mods, you may consider switching amps. This is the "Treble" version. Cheers. I am going to do a couple of mods on it just to make it a little better. Next the VOX AC30 Top Bost JMI Product 2x12" Grey Bullet, Wooden Transf. Wondering what’s the best place for info, or the most concise way to learn about and get educated on tube amps circuitry and/or components? Jul 9, 2018 · The AC30 Custom Classic series was a great shot at an affordable AC30, especially with the new Custom series dropping the choke, tube rectifier and classic tone stack option. € 366 5996. Resistors and caps across the board have been dutifully replaced with vintage spec SOZO, Sprague, Nichico Dec 29, 2022 · The Vox Showroom Ac 30 6 Chassis A Look Under Hood. The document describes extensive modifications made to a vintage amplifier. com/watch?v=XrVZuXCle-MLe Feb 24, 2020 · It's a Vox AC30 Top Boost with minor modifications, mainly no vibrato, added EF86 channel (circuit for it still not fitted, will do someday) and Master volume. As far as I'm now addicted to this forum, I wanted to talk about the different AC30 TB schematics available either from VOX, Hoffman or again S. They were made in China or Taiwan for VOX but they sound quite good stock. Having said that I looked online and generally see ac15, vintage ac30's/ac50's and can't seem to find the right schematic for this amp. I am just trying to get a sense as I've been curious ever since I heard about the mod. Jan 15, 2012 · You may ask: why scaling an AC30 and not using a lower wattage amp like an AC15 or AC4? Well, it is because a low-watt amp only has one compression point, one cusp of distortion and one loudness level through a speaker. Aug 1, 2009 · The VOX logo will be re-used (it can be detached from the shell) and maybe even the Vox pattern "grill cloth" too (soak in water and gently peel off). Post by vox_boy » Wed Apr 02, 2014 11:18 am. [YOUTUBE]mlwFahKw6is[/YOUTUBE] Zenkudo drive is the only pedal used in the front of the amp. It is a beautiful amp, and sounds really nice. Aug 1, 2019 · Has anyone here been tinkering with the VOX AC30C2 amps? After a good while of owning one, it's turn under the soldering iron came up So here's the schematics with a few notes on them. I used to gig two 1960s AC30 Bass unit back in the 90s and it was a killer rig (and a back killer too at the end of a gig). I tried 3 different implementations of circuitry. Top boost looks Oct 16, 2020 · A closer look at the Vox AC30 HW series' strengths and weaknesses. The AC15C1 also has tremolo and a spring based reverb. I have a 2005 Vox AC30 CC2 and am looking to fix it and possibly experiment with some mods. The first "big hit" from chief designer Dick Denney was the VOX AC15, which was introduced in 1958 and was also offered in a 30 watt version, the VOX AC30/4, on from 1959. Nov 13, 2017 · In the 1970s, the AC30 returned to centre stage as the amp of choice for Rory Gallagher, Queen and U2, who all helped elevate Vox’s masterpiece to the iconic status it enjoys today. AC30 [HR] ACM 900. uk/vox_ac30_circuit_diagrams. voxac30. comTesting a modded VOXAC30 CC2X with greenbacks. Feb 2, 2011 · - magnetic components ac30 output transformer and 20h choke - ef86 channel instead of tremolo, with 6 way eq swich ala dc30 - sozos and mustards because I have plenty already and they are perfect for this project - carbon comps in selected positions Amp is mainly based on the vintage ac30s - I'm using the vox ac30 guide. I’m pretty happy with them and hopefully, they can help others too. Vox Vintage Circuit Diagrams. Vox Tube amp schematics, Hoffman amps tube amp schematic library Vox Schematics Vox_ac30v_revrb_mod. I changed out the stock AX7 tubes for a NOS Telefunkin and Siemens AX7 tubes. Hoffman Amplifiers Tube Amplifier Forum » ; Amp Stuff » ; Tube Amp Building - Tweaks - Repairs » ; Master volume mod - AC30 Dec 13, 2009 · This video was done immediately after I did the bright cap mod. € 3,30 16718. The AC15C1 is a true two channel amp. youtube. And an AC30 gets really loud. mylespaul. 1958 with the ECC83/12AX7-driven Top Boost. lanauestudi. But if it's not too much trouble maybe you could scan all the old AC-30 schematics that are older than about 1975, and I could put them in Hoffman's schematic library. I also had Stan do another mod to switch it to 15W mode or full 30w mode. Original Vox footswitch 1965 Code AM26 First 1966 Vox AC30 JMI Top Boost Vibrato in very nice conditions, all original, matched tube, 2x12" Silver Bullet, 4 Sovtek EL84 Matched with a rectifier tube GZ-34 Variable Voltage Selector Ready to play Sep 19, 2020 · VOX AC30HW2 with alcino blues - inside pics and mods I have opened up my new AC30HW2 to see what is inside. Has anyone here removed C69 which is across the gain pot? This cap makes the amp "bright" with the pot turned down. For more info, Subscribe to this channel, join us a Dated 10th September 1964. The first channel incorporates the preamp circuitry from the original AC-30 "Normal" amp while the second channel featured the Vox AC-30 "Top Boost" circuit. Phase Inverter: AC15 or AC30 Schematic TONE CUT: AC15 or AC30 Schematic Vox Valvetone Mods . this thing sings like a true VOX should. We also are selling New BD-2/Super pedals on buyanalogman. Post by rp » Thu Apr 30, 2015 11:35 am A friend bought on of these used, I'm not there to tweak it for him but I was wondering why the h#ll Vox would change the 220K plate resistors on the input tubes to 100K, that really are part of the Vox sound. If i owned your Hand-Wired Vox i and a pair of VOX/Celestion Alnico Blue. Jan 17, 2021 · My son has a CC2. TOP BOOST Channel: Vox AC30 Schematic HOT/COOL Switch: Tone controls are lifted from ground a bit. What kind of suggestions does AC30CC1 modified by Don "Toneman" Butler. To put it simple, a scaled AC30 is a completely different beast than an AC4 for I started doing some hunting online, and came across the so-called "Caldwell Mods" for that particular AC30. But when you turn the treble up, the bass goes down. When the switch is flipped to "Brilliance," this channel takes on the tonal characteristics of a 1964 JMI Vox AC-30 "Treble" amp. 2005 Vox AC30CC2 2x12 Combo Amp – Excellent Condition! 🎶 Vox AC-30 C2 Amp Jul 9, 2008 · I´m trying a PPIMV, and I see in the Vox AC30 CC2 schem, that has a PPIMV also, that it has 10K R´s inline between the PI caps and the power valves grid resistors, before the master volume pot. Key modifications include: 1) Replacing components in the reverb circuit like the pan and resistors to improve reverb quality. Includes material, year, finish. Note: these amps have all been modded to Jun 3, 2014 · When I said does it have to be a Vox, I was asking if you needed it to be a Vox AC15, or just that you want the EL84 amp sound of an AC30 to add to your stable. Subtle difference, but noticeable. $999. Use: Gigging (one lined up next week which will be this AC30's first gig) This is the second AC30 I've owned the first being a CC2X. It shows component values that have been changed from their original values, including resistors and capacitors connected to the treble knob, normal volume Jan 26, 2025 · here are some V readings and some notes. pro › VOX › mod-compilation › lyle-caldwell-modifications. The mods give it more gain in my opinion. In 2004, Vox created the Custom Classic Series, and production was moved to China at some point thereafter. Vox AC30/6 TB from 1993, so an early Korg era model. Feb 3, 2010 · Selling my 2007 Vox AC30 Custom Classic amplifier with Vox Celestion Blue speakers. Not really a mod but I swapped out the stock Chinese tubes for new production Mullard pre's and Tung Sol power tubes. The AC30CC is Vox´s new vision of what a modern production AC30 should really be like, combining vintage looks with modern features and a much wider range of sounds. Don replaced all the signal components and replaced the original output Nov 15, 2020 · Identifying AC30 Master Volume Mod Jump to Latest 3K views 16 replies 6 participants last post by nonreverb Nov 29, 2020 Nov 15, 2020 · Identifying AC30 Master Volume Mod Jump to Latest 3K views 16 replies 6 participants last post by nonreverb Nov 29, 2020 Mar 30, 2007 · I own an AC30 Custom Classicyeah, I know, for all of you Vox-crazy tone geeks out there, your AC30's are probably 1000 times betterbut I love it! For the price, you can't beat this amp. Mar 10, 2011 · This modification is suggested for and works with all AC30/15 models of the CC series. I use the amp as a clean slate for pedals, and the AC15 wasn't keeping up with my band, when using heavy gain pedals. , EF86 channel, Normal, the AC15 version or additional mods). Next to the volume control for the Normal channel on the new AC-30 CC amps is a small toggle switch. channel of the early sixties. If only a 2x12 Vox will do and you can't swing an AC30 Custom, you could own one of these without feeling second best. Filter by model. Vox AC-30 top boost module kit (NEW) SOLD | View similar gear. html According to Caldwell, these mods will make the CC sound more like a vintage JMI. I have been hunting the site pages and see that the top boost is pretty much the same as the trainwreck rocket. So how do I get that in my ac30? Mar 30, 2007 · I own an AC30 Custom Classicyeah, I know, for all of you Vox-crazy tone geeks out there, your AC30's are probably 1000 times betterbut I love it! For the price, you can't beat this amp. 1. txt) or view presentation slides online. Like the cover was removed. Es ist eine der Geschichten von denen man immer denkt: "Sowas passiert doch nicht wirklich!" Wir konnten einen alten VOX AC30 "Copper Panel" erwerben, der in einem Müllcontainer in Südfrankreich gefunden wurde Excellent amp; mods are incredible ($700USD/$850CAD) worth of mods done to it. speakers, as well as combining, for the first. This only happens with the Bri A closer look at the Vox AC30 C2/C2X series' features and what some of the Psionic Audio JMI+ mod options sound like. Jan 26, 2020 · Vox AC30 Custom Classic - Lyle Caldwell simple mods. Jul 13, 2013 · 2 - there is a 120pf bright cap (C13) across the Top Boost volume knob. Re-issues have a different way of wiring the inputs than a standard Vox. If you're open to other brands, there are better built amps that do the Vox AC sound better than the CC1 series. This correction makes the model sound warmer and more bell-like than the real AC30, and it will take away the characteristic chime of the amp. It is in fact a scaled up version of the AC10, which I own, except this has an effects loop & ventilated back panel. This is the Top Boost mod, which Vox did in the early 60s and they put it in the back “This is the Top Boost mod, which Vox did in the early 60s and they put it in the back. Bass Gear Best Sellers Electric Featured Gear Guitar Guitar Amps Guitar Effects Guitar Gear Uncategorized. May 22, 2018 · Lyle Caldwell (search him) has several mods for the different models of AC30, usually changing the resistors or 'bright caps' on the inputs or tone stack can help tailor the sound. Only a few divergences from the AC30/6 Normal circuit: C2, C3, C5, C6, C7, C9 and C10; the cathode circuit of V1; and at each of the three volume controls, a 330k resistor and 220pf (not numbered) to enhance the treble response further. What if somebody has $800 and want to buy and amp and thinks they want a Vox but don't want an AC15 for lack of headroom? AC30S1: $799. That is a screaming deal! Mar 19, 2011 · 22danielp PAT. I also have to admit I had high expectations for. Sep 1, 2018 · AC30 layout and mods for build Hi, I want to build an AC30 from scratch. Feb 9, 2011 · VOX AC30 Switchable brian may mod. All I need are components. I built the cabinet too, from scratch, using birch plywood, and then covered it with green tolex. This amplifier attempted to reproduce the sounds of the original Vox AC series introducedin 1958, but using modern cost saving design and Chinese manufacturing. 3 - Vox went with a 56pf treble cap in the tone stack (C16). pdf), Text File (. -Modified AC30's distortion was more defined, not as muddy, especially with a treble booster. The modifications noted on OS/065 are incorporated. Capacitors (Philips-Lemco red colour NOS): - 2 of 0,15 uF (150nF) - 1 of 0,1 uF (100nF) Resistors (Erie NOS): - 4 of 1k5 - 4 of 100 ohm - 2 of 220K - 2 of 100K - 2 of 10K Aug 20, 2024 · What is known, is HH shorted C1 in his "70's AC30" . Nov 21, 2007 · With a lot of positive feedback from this toe-in-the-water, Vox has released the Custom Classic range - designed in England but made in China. Vox AC30 Custom Classic 2 (CC2) from 2007 complete with the following upgrades done just this summer: Complete Psionic Audio vintage mods by Lyle Caldwell (caps, resistors, etc) Power Scaling/Attenuator also done by Psionic. It is a very interesting circuit and I believe if a person(not me) wanted to modify this mod lol it would work just fine . Jun 27, 2018 · There is a large gap between in pricing between the AC15C1 and the AC30C2. Imagine something kinda like a vox (maybe a hint of Marshall there too) but a bit more gain, thoatier, more growl, and darker. When we checked one out, we found they were using some excellent quality components, and the circuit was nearly a tube screamer as people expected. Our Mod Form has a choice for the BD-2/Super mod for $65, please fill it out, print it out, and send it in with your pedal if you would like this mod. # 2. Feb 16, 2011 · I strongly suggest an inexpensive mod well explained by Lyle Caldwell (just google his name + "AC30 mod"): just changing R6 and R7 to 220K USING CARBON COMP RESISTORS made a huge improvement to the amp overall. Reply Delete Oct 2, 2020 · That being said, my favorite recent made vox inspired amp I’ve tried was probably the Tex EF86 I used to own. What we know today as the AC30 saw the light of day in 1960, being called the VOX AC30/6. The power transformer winding is circa 300V-0-300V. Feb 5, 2013 · I have a 1979 ac-30 - rose Morris but only just, if you know what I mean. Feb 19, 2019 · My cousin and I are planning a day to go over my amp to generally service and do a go over the amp since he's majored in electronics. Brand New. I am going to do the conversions to get it there BUT I have noticed that the rocket leave one side of the 2nd valve un-used. It came with a quartet of old RFC/Mullard/Philips tubes from the 1960's. The sound of the amplifier is good, but can be improved with some upgradesand some modifications. I am going to repl Aug 13, 2023 · I am thinking of building a Vox AC30 clone using the Hoffman layout, and I have a couple of questions. The "vintage" spec for this cap was 100pf, but to sound more like a 40 year old AC30 with 40 year old speakers I find that 68pf is a more pleasing value. Aug 19, 2024 · In fact the silver Alnicos in that 1970 AC30 were rather dark sounding (less bright than earlier Vox Alnicos) but incredibly efficient. Guitar Suhr S3The guy who made it doesn't want to tell me what he exac CONVERSION TO DAVE PETERSEN BM AC30 SPECIFICATION. My New Favorite Gear: The Jan 10, 2010 · There are a few mods, but the A-channel is VOX AC30 and there has a matchless DC30 behind the lever switch too. Audio Media Research · AC30 BOOST MOD TREM [HR] YOU MIGHT ALSO LIKE. I found reducing the input gain helped as the default neural modelling process seems to create a . I've had the pleasure of playing a 70's model owned by a former bandmate and was absolutely blow away by the tone and bouncy "sag" of the amp when you cranked it, but I don't exactly have the cash to As the AC30 has no Clean / Lead distinction, you have to turn up the volume to get overdriven or distorted sounds. However, it has no master volume so in order to get any decent break up you have to open up the volume. 99 US I think this was the same intent with the AC10C1 - vox needed to have something priced between the AC4C1 and the AC15C1. txt) or read online for free. xvfbjtzkniulzoctxytrmgwiksodaukwspddhhvoadbwhqoaaonjfgv