In that case, id stick to the ac15 style power supply with the ez81 rectifier so that the voltages are correct. Of course, vox is still around todayand still vital. Buying a vox amp page 2 steve hoffman music forums. The biggest questions i have there are 1 position of the preamp tubes, i. Vox ac30 preamp plate supply voltage and plate load resistor vox ac30. A in v1 position, a tube that can provide a nice chimey clean classic ac30 tone for normal channel, as well as supplying the dirt for the initial top boost gain b in v2 position, a tube that can break up early and provide the overdrive for my top boost. This 15watt combo amp was one of the first to define the british sound and continues to be used on stages and in studios around the world. This is the schematic diagram for the vox ac4 amplifier. It is one of the classic most recognisable british amps to this day. Built like a tank, the jmi ac30 was hand wired on tag strips fastened to a sturdy steel and aluminum chassis. Ac30 top boost modification circuit for above 1961, download diagram. Feb 07, 2019 fender, vox, and marshall make fantastic amps. Vox ac30 standard tube set, jj tubes x4 el84, x3 12ax7. Vox custom ac30c2 30w 2x12 tube guitar combo amp black.
I have had no issues with the ac15s as their tubes come out the bottom of the chassis instead of being locked in the tube sauna ac30 chassis. For example, one strategy is to put a more expensive, quieter tube at v1. Vox amp heaven schematics berkley cambridge pacemaker. They will all attempt to the best of their abilities to not interfere with commercial discussions. Hoffman amplifiers turret board order page watch this shopping cart tips video hand wired point to point turret boards note that these are hoffman layouts, not original amp layouts the layout diagrams, schematics and other info for hoffman boards is on the library page here make sure you look at all the info on the link above first. The audio was recorded with the line 6 tone port ux2 vox ac30 preset, into audacity software. If you love the ac30 tone and you need a way to practice silently, these are for you. Hoffman amplifiers turret board order page watch this shopping cart tips video hand wired point to point turret boards note that these are hoffman layouts, not original amp layouts the layout diagrams, schematics and other info for hoffman boards is on the library page here. The vox ac30 custom valve guitar amplifier vox amps. This allnew ac30 represents the evolution of an iconic sound, pairing legendary vox tones with a simple, modern approach to amplifier design. Demo of ac30 tube replacement and tube sound comparison. Has anyone in here built a vox ac15 with a layout they like and can share. The ac15 customs 15watt design offers manageable volume in the live environment while still being able to.
These ac30 amps were mostly offered in the traditional black tolex. I feel that this reissue of the ac30 has real historic significance. Vox amphones ac30 headphones are perfect for practice, listening to your mp3 player or any other source. All tube design featuring two 12ax7 preamp tubes and four el84 poweramp tubes. See if the vox ac30 might be right for your worship guitar rig at. Ac30cc2 schematic heaven, tube books, schematics galore. I would like the top boost channel to be very dirty. Plugging your guitar into this input will route your signal through the top boost channel. Given our current inventory, your two choices would be sovtek and jj el84s, as we are not able to consistently provide vox amps with other brands of el84s. I opened up the amp, and it looks like the tubes are from multiple manufacturers. Ac30cc1 musical instrument amplifier pdf manual download.
Sound clips page tube amp sound clips and tunes of all types. Vox ac4hw1 4watt 1x12 handwired tube combo amp sweetwater. 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. View and download vox ac30cc1 owners manual online. The design of the vox top boost circuit appears to have been lifted, part for part, from. For many vox fans, the ac30c2 represents a return to form, moving away from the redesigns of the late 70s and 80s and employing the original tube and speaker configuration. Amp possdant lamps 8, not 11 formerly ac 30, as described around i disassemble to check, 4 power tubes electro harmonix, sovtek a rectifier, and two 12ax7 tung sol, and i did not 12ax7b verify the mark i think tung sol. The vox ac30 custom valve guitar amplifier draws from over 50 years of tube ampbuilding expertise to offer the most versatile ac30 design in vox history search open search box or submit search facebook instagram twitter youtube soundcloud. However, vox would not develop their top boost tone circuitry from sample circuits found in the back pages of a tube manual nor was the top boost circuit a unique jmi design. While there will always be purists who scoff at anything but the original, this korgowned vox reissue provides the sound that made the amp. Stock tubes are always subject to change by the manufacturer.
I cant make any recommendations because i have no first hand experience, but the idea is soundthe vox circuit in a more conventional layout. Im running those in a vox inspired head, and really like both the clean and distorted character. I would like to replace some of the tubes and need some advice. The 12ax7 has many many cousins, almost all of which are totally interchangeable. Buy vox ac30 standard tube set, jj tubes x4 el84, x3 12ax7. I also have to admit i had high expectations for the ef86 preamp channel, which vox phased out during the transition to the renowned ac306 twin model. The ac30 was the product of the furtive mind of dick denny, and vox debuted the amp in 1959. The ac30 model in the vox amphones series faithfully reproduces the sound of the classic vox ac30 amplifier. Electro harmonix replacement tubes kit for the vox ac30c2. Supply 1 x matched quad set of premium jj el84 output tubes. This site is run by unpaid, volunteer moderators, some of which have commercial interests in the guitar amplification business.
Tube amp schematics, tube amp information, tube amp projects. Bear in mind im a passionate only, and i only get started in tube world. Here is a quick look at the different models and my recommendation on the two best versions to buy. So i searched for pics, took the schematic ac30 tb reverb 1978 and started. Vox ac30cc2 wharfedale gsh1230 speakers gz34 rectifier tube everything else is factory default. Finally, vox has brought the soughtafter top boost tone in a handwired, all tube combination. Someone has the reverb board layout of this version of the vox ac30. Speaker 12 celestion g12 century vintage the century vintage is a new loudspeaker combining the properties of laima. Stock original our stock tube kit comes with the exact same tubes that vox stocks the vox ac30 with sovtek el84s. To many, the most celebrated ac30 was the top boosted 1964 model manufactured by vox under the original jmi ownership. Whats better, the vox ac30 cc2 or the ac30 6 top boost. Tubes for the vox ac30 the vox ac30 amplifier requires the. How about mating the vox top boost preamp section to the power amp of a gibson ga 17 rvt. Before marshall, orange, hiwatt, or any other beloved british amps hit the scene, vox was there, defining in a very authentic sense the sound of the british invasion.
We opted for the c2 over the handwired ac30 for two reasons. To repairsservice on vox ac30 90s limited edition reissue combo. In the handwired series, tubes, transformers, speakers, chassis, and custom parts all join together in an ideal state to deliver the richest and most powerful. Jun 18, 2014 the vox guitar amplifierand the ac30 model in particularhas played a storied role in popular music history. Ac30 vs ac15 output section is to taste but if you want it sound like an ac30 use the ac30 values other than cathode bias resistor and capacitor match that to the ac15 power section to keep the proper bias voltages. Vox ac30c2 custom 2channel 30watt 2x12 guitar combo reverb. Lastly, id like to address an issue regarding vox ac30 amplifiers, as seen in print. The ac30 c2 is an up to date take on the classic top boost model, and features some very welcome features, whilst retaining its classic vox styling. While there will always be purists who scoff at anything but the original, this korgowned vox reissue provides the sound that made the amp famous in the first place. Since the vox ac30 runs power tubes extremely hot, we were only able to test el84s that consistently have a lower idle current draw. Free vox diagrams, schematics, service manuals schematics. Fender bassman vintage reissue, i bought this about a week before i got my 65 twin reverb. I have heard that the issues with frying tubes comes from the crazy heat and poor ventilation on the ac30. The rose morris company, who owned the vox name through the 1980s, sold vox to korg in the early 1990s, who then manufactured a reissue of the early 60s ac30 top boost, correcting previous inconsistencies ranging from the correct style grille cloth to the gz34 rectifier tube.
Vox ac30 schematic drawing upon nearly 60 years of heritage, vox handwired amplifiers have on the legendary top boost tone circuit made famous by the iconic vox ac30. Electro harmonix replacement tubes kit for the vox ac30 reissue. The vox ac30 is one of the most popular amplifiers of all time. This vox ac15 custom delivers the classic chime and complex grind that has made the brand famous. It means i cant guarantee proper functioning of my amp layouts. I was always loving pushed to the limits vox ac30 tone, and hate the fact that there is no replica layout on the interweb, so i. Ac3036 top boost mod schematic, os010 jennings, 1961. Design your own custom turret board or eyelet board. The jj electronic 12ax7 ecc83 has quickly become a modern classic in preamp tubes. I had a strange sound coming from my vox ac30, and had come upon the decision to either send it in for repair, or try replacing the tubes to see if it would fix my issue. Ruby tubes replacement tubes kit for the vox ac30 reissue. Vox ac4hw1 electric guitar combo amplifier at a glance. Im going to change all tubes this initial time with a match set of four.
Singlechannel design inspired by the ac30 s trademark top boost. In the excellent tome the ultimate tone writer kevin oconnor states all vox products but especially the ac30 are a servicemans nightmare. In the ac15c1 and all other tube amps, each tube in the preamp has a discrete function, and advantage can be taken of this to place a particular tube for optimum result. Dec 16, 2008 i also have to admit i had high expectations for the ef86 preamp channel, which vox phased out during the transition to the renowned ac30 6 twin model. But i am getting this buzz that i wasnt getting just a day ago. Chimera boombox vintage guitars guitar amp benson bass music instruments layout cabinet. Tubes free delivery possible on eligible purchases. The all valve vox ac30 handwired tube guitar amplifier ac30hw2 ac30hw2x.
That reissue the pictures here are of is more like the old tweed fendersontrols on top, tubes hanging down, all on boards but at least sectionalized. For the low cost of these tubes, they fixed my issues, and got the amp sounding like new again. Based on the classic ac30 design, the allnew custom series ac30c2 and ac30c2x offer numerous uptodate enhancements. I think i have an idea but its been tough to find anything definitive online.
Its rugged design and rich harmonics make this tube an obvious choice for musicians who need a reliable and high quality tube at a reasonable price. The design of the vox top boost circuit appears to have been lifted, part for part, from the 1950s era gibson ga70 amplifier see photo at right. I sold off all of my hand made amps a while back when i no longer had time to record and now that i have a little time i need to rebuild my amp line. Ac30 poweramp section of the top boost reissue 1993 onward, download diagram. In terms of tone control, it is split into three sections volume, tone, and vibrato. Pick this tube kit if youre tubes have worn out, but you happy with the way your amp sounded before.
Vox ac30tb and ac30tbx amplifiers the vox showroom. Ac30 36 top boost mod schematic, os010 jennings, 1961. If you find a vintage ac30, be prepared for some extra costs, because between the caps, pots, tube sockets and transformers, you will be. Vox ac30c2 custom 2channel 30watt 2x12 guitar combo. I have had no issues with the ac15s as their tubes come out the bottom of the chassis instead of being locked in the tube sauna. It sounds absolutely gorgeous and i bitterly regret over and over again selling my 1960s one. The result is a faithful reproduction in sound and style of those pioneering vox amps of the early 60s.
Ac15 reissue pre amp schematic, ac156002 iss 1 vox, 1996. The guide has new schematics, layout drawings, photographs and parts lists for the vox ac30,vox ac15,vox ac10,and the vox ac4. Ac50 amp schematic vox sound ltd, 1976 ac50 amp schematic joe piazza ac1002 amp schematic, os036 jennings, 1965 ac100 amp schematic joe piazza check out the vox showroom for more historic information on the vox amps. Vox, today a subsidiary of korg, recently began making a highend reissue of its famed 30watt amp in several configurations, and offered to let us take a look at its latest the ac30 custom classic cc with two 12. Some makers substitute different or more powerful output tubes and. Many musicians have a preference, but lets talk about some of the key differences between these powerhouse amplifier brands. Hoffman amplifiers tube amp forum, vox ac15 layouts. The online resource for old vintage vox circuit diagrams.
The vox ac4hw1 gives you that legendary top boost tone in the perfect studiosized package. Discontinued vox amphoneac30 active guitar headphones. Vox ac306 top boost reissue reissue of the 1963 model, bought in 20052006 new celestion g 12m greenbacks ecc83, ecc82, gz34, el84 valves. I have a set of ac15 trannies and i need to get the vox sound for my recently risen from the grave recording studio. Vox ac30 amplifier the specifications of the vox ac306 tb are the result of painstaking research by our guitarists and engineers, who were not happy until they re created the amp that started it all. Since the higher output ac304 shared its preamplifier design with the lower powered ac15, vox discovered the highgain ef86 tube was susceptible to. Shop for the vox custom ac30c2 30w 2x12 tube guitar combo amp and. Vox diagrams, schematics and service manuals download for free. Jmi vox ac30 with top boost in panel the vox showroom. Explore the latest synths, software, bestsellers and moreshop now.
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