Vox ac30 top boost schematic software

The online resource for old vintage vox circuit diagrams. A click on the schematics or the layout opens a pdf file of the respective plan. It is the old top boost circuit and sounds phenomenal. Vox diagrams, schematics and service manuals download for free.

Offering the easiest way to enjoy true analog amplifier sound in your headphones, the amplug series has been a bestseller since it first appeared in 2007. The vox handwired series relies on the painstaking technique of turret board handwiring a method requiring a high level of skill and craftsmanship is used, resulting in wiring thats beautiful in its artistry, ensuring an efficient signal path with minimal loss and no restriction in amplitude. I know asking for specific settings is stupid but a good place to start and some helpful tips would be incredibly helpful. But you can recover that behavior by setting the mid control fully ccw furthermore, modern ac30s dont have this flaw. This vox ac30ch will never go out of style because of the number of players still depending on its design. The later is used rarely and uses a quite complex circuit.

If you bypass both these opamps by copying the 70s ac30 dallas schematic provided by vox youll get rid of it. The top boost channel has more tonal variation possible and it has a fair amount more gain than the normal channel, which has a darker core voice. Page 3 although the vox brand has been owned by numerous companies, and even though each of them has made some changes to the ac30, the amp itself has remained basically unchanged since 1965. The 1964 ac306 treble amp shown at left and above is a mint condition example of this model from the north coast music collection. Among the various vox tube amps, the ac4 has remained one of the most popular over the years, as they provide a simple and hassle free way to.

It gets a mention on the vox showroom site here the vox showroom the ac30tb vintage head and 4x12 cabinet any info would be great. I have the vox ac30 cc2x, it has the blue speakers, made in china. The english channel was our first attempt to adapt the vox ac30 top boost. Later on, vox also offered additional versions of the ac30 unit. This model was in my mind a cost cutting exercise and a step backwards. Vox has taken the best ac30 designs and added a number of useful, very cool features to create the most tonally flexible and affordable ac30 to date. It will be based on stock ac30 6 chassis, but the tremvib channel wont be there. I would like the top boost channel to be very dirty. The combination of the vox ac30chs class a, el84driven power amp and its top boost preamp gives the amp its iconic sound. I intentionally limited the midrange notch since, imo, its a design flaw in that tone stack. The vox handwired series relies on the painstaking technique of turret board handwiring a method requiring a high level of skill and craftsmanship is used, resulting in wiring thats beautiful in its artistry, ensuring an efficient signal path with minimal loss and.

An old vox ac30 sounds great as it is and doesnt need a whole lot of modding in the tone department, but, a few enhancements will add greater versatility and help reduce noise. Aug 19, 2007 the ac30 early models are the ones to get, there is no doubt about that. The top boost channel receives a treble and bass control. The inside of the new ac306 top boost chassis would be stamped with the words top boost in red paint see second photo from the top of the page.

The schematics and the layout are the basics of the build. I have a jmi reissue vox ac30 6 which is a recreation of the old ac30 with the top boost in this schematic, c37 top right would be the most likely suspect. 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. Tombolas diy spring reverb driver circuit ua726 diy music. The ac30 early models are the ones to get, there is no doubt about that. Owners manual, service manual vox ac30cc2 owners manual 52 pages. 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. Among the various vox tube amps, the ac4 has remained one of the most popular over the years, as they provide a simple and hassle free way to enjoy the rich sound of a tubedriven amp. A postphase inverter master volume is fitted as well. If you study the schematic closely, you may note the following. The big news for the heritage collection ac30s are the choices for the two channels. The sound is basically the tb channel cranked and the rest.

Heres an updated drawing that includes the drill guide and jumper guide. Vox amplug 2 ac30 guitar headphone amp guitar center. Just a quick demo on some features of the ac30 top boost reissue. Top boost volume, top boost bass, top boost treble, reverb tone, reverb level, tremolo speed, tremolo depth. The vox ac30 custom valve guitar amplifier vox amps. Same basic problem most ac30 owners have, cant switch between channels. The real secret to the vox ac30 tone is concealed in the phase inverter. Ac30 36 normal amp schematic, os065 jennings, 1960 ac30 36 top boost mod schematic, os010 jennings, 1961 ac30 36 bass amp schematic, os057 jennings, 1964 ac30 reverb amp schematic l. Below is just the phase inverter tube, and the associated circuitry. Vox augmented early ac30s with a module that featured active bass and treble tone controls, called the top boost module. Mar 08, 2012 jmi era vox ac306 normal rev7 jmi era vox ac306 bass rev7. Weber sells an ac30 like kit called the 6v30 which is moderately close to a 60s 3channel ac30, but you get only parts and a layout and schematic, and youd want to upgrade some of the parts and the transformers if youre going for accuracy.

Vox ac30 amplifier the specifications of the vox ac30 6 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. My hw from 2003 has only the top boost channel, it sounds amazing. The iconic top boost ac30 and most other standard ac30s offered either two or three independent channels. Hey guys, i have a vox ac30cc2 that has a dysfunctional top boost channel. Apr 20, 2009 just a quick demo on some features of the ac30 top boost reissue. The result is a faithful reproduction in sound and style of those pioneering vox amps of the early 60s. This model ac30 allows for blending the normal and top boost channels together if that helps. Legendary top boost tone inherited from the vox ac30 gain, bass, treble, and volume controls 4watt class a amplifier design 12ax7 preamp tubes x2. 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. Trying to find a good overdrive sound for my vox ac30 discussion in ampage area started by theriot21, jan 4, 2017.

Jmi era vox ac306 normal rev7 jmi era vox ac306 bass rev7. In addition to the normal version without the top boost, and the top boost version which was a normal version with the brilliance unit added, vox, with slight circuit modifications, created two more versions that were voiced in brilliant treble, and bass styles. Vox eventually hit the mark with an ac30 top boostso named because it had separate controls first on the back of the amp that introduced an extra gain stage, bass and treble. I have a jmi reissue vox ac306 which is a recreation of the old ac30 with the top boost in this schematic, c37 top right would be the most likely suspect. Vox amplug ac30 guitar headphone amp musicians friend. I may even try a hybrid ac3046 so that it has the top boost, or maybe a switch to enable. It will be based on stock ac306 chassis, but the tremvib channel wont be there. As a result, the bass and treble controls would no longer protrude from a rectangular hole in the vinyl covered upper back panel of the amplifier. King royal is its more brilliant sounding top boost channel, its really alive, and mid scooped in a very musical way, while still retaining ac30 qualities, the tophat king royal is more true to the ac30 upper mid thing, more bark and chime. The bright boost capacitor calculator shows the effect of the 100pf capacitor. Ac30 provides the ac30 topboost sound, classic rock gives you the classic crunch sound of a ukmade 100w amp, metal delivers the extreme highgain sound of a usmade amp, and bass is designed specifically for bass.

The ac306 was produced in four different versions, as documented by vox service schematics for the amp. My cc1 has a switch to blend both the top boost and normal channels, i use that amp that way, using the normal channel to dial in some additional low mids, but i never use the normal channel alone. Since then, the ac30 has remained the choice of the worlds most accomplished artists who have come to rely on its unique voice to amplify theirs. The guide has new schematics, layout drawings, photographs and parts lists for the vox ac30, vox ac15, vox ac10,and the vox ac4. Top boost for natural drive, normal for pedals and treble booster used with my red special. The top boost circuit would no longer be an optional, addedon circuit, it would be a standard feature on ac30 amps. From a few schematics i found it looks like the pot just connects ground on one end and to another. Jun 18, 2014 as vox sought to compete with the sound and volume of bigger fender amps, two speakers were utilized.

A wide range of variation is available, as the lineup consists of four models. Jmi vox ac30 with top boost in panel the vox showroom. I bought two of these new around 1992 and want to gather a little more info before i part with one of them. The vox ac30 custom classic is the culmination of over 45 years of high quality, guitar amplifier design and fabrication. Vox described the ac30 top boost kit in a 1965 catalog where it stated, a conversion unit to give you the ultimate top boost over 30db at 10 kilocycles. The pair of brass mounting screws that secured the upper back of the cabinet against the control panel also needed to be relocated on the ac306 top boost chassis. I did that because i didnt use the reverb at all and the hiss is way lower now. Ac30cc2 schematic heaven, tube books, schematics galore. Vox ac30 silver jubilee circuit analysis amp books. Quick test of a vintage jmi ac30 non top boost with additional top boost unit in the back panel. Controls are minimal with a single volume pot, the top boost bass and treble circuit, plus a pair of inputs for high and low gain. With the amp at full blast on the normal channel the hiss is almost inaudible and the top boost channel has a manageable amount of it.

The ac306 was produced in four different versions, as documented by. This in itself is a glowing tribute to the original product designed by dick denny when vox was part of jennings musical industries. Vox amp schematics to assist you with your amplifier repairs and modifications. Most vox enthusiasts agree that a mid sixties top boost is the number one ac30 sound, so that is the basis for channel two. The pair of brass mounting screws that secured the upper back of the cabinet against the control panel also needed to be relocated on the ac30 6 top boost chassis. An ab pedal is awesome when used with a vox ac30, you can swap as needed ahgraylensman and dismalhead like this. How to get classic vox ac30 tones using guitar modelling. Also available in classic rock, based on a ukmade amplifier head, and metal, based on a californiamade highgain amplifier head. Ac30 36 top boost mod schematic, os010 jennings, 1961.

Its bright and i play a fender through it, so ive done some minor modifications to take some of the brightness out of itnothing major. A solid 4watt combo amplifier with a 12 speaker sure to impress with traditionally vox sound and design. From around 1963, the top boost circuit was properly integrated into the circuit. Ac504 mkiii amp schematic, os072 jennings, 1965 ac50 amp. Looking for some more info on the ac30 top boost vintage head.

The normal channel works perfectly fine, but the top boost is dead silent. Just change the tubes from time to time, other than that its a real work horse. Fender parallel 12at7 reverb driver ampeg design for 7591 power tubes. Ac15 reissue power amp schematic, ac156202 iss 1 vox, 1996 ac30. While this approach did certainly capture the amp character to certain degree, the overall. Vox amp schematics to assist you with your amplifier repairs and. Ac30 top boost mod 1961 ac30 topboost preamp ac30 bass model 1964 ac30 top boost dallas model 1970s ac30 top boost 1978 ac30 ss solid state model 1970s ac30 top boost 1986 ac30 top boost 1989 ac30 top boost standard model 1990 ac30 top boost limited ed model 1990 ac30 top boost vintage w reverb 1992 ac30 top boost ri. However, this ac30 mimics customisations may has carried out on his own amps for years. 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. Treble version, redrawed schematic and more text to be fallow. I run the amp with the two channels patched together. Free vox diagrams, schematics, service manuals schematics. Ac30 emulates the ac30 top boost sound of a vintage vox ac30, and uses two naturalsounding gain stages to reproduce the distinctive ac30 tone. Do you have a vox guitar or bass tube amp that needs repair or modifications.

Vox ac30 cc2 schematics readdownload vox ac30 cc2 one of the best and most beloved guitar amps in the world, vox ac30 cc1, vox. The guide has new schematics, layout drawings, photographs and parts lists for the vox ac30,vox ac15,vox ac10,and the vox ac4. Ac30 top boost vintage model with reverb 1992 download diagram ac30 poweramp section of the top boost reissue 1993 onward download diagram ac30 preamp section of the top boost reissue 1993 onward. Incorporates separated bass boost for new wonderful split sound and pseudo stereo effects.

Trying to find a good overdrive sound for my vox ac30. The original vox ac30 has 3 channels, normal, top boost and vibrato. Feb 08, 2011 quick test of a vintage jmi ac30 non top boost with additional top boost unit in the back panel. Perhaps the most iconic amplifier in voxs pedigree, the ac30 earned its place in history as the amplifier that powered the british invasion. To view this site, you must enable javascript or upgrade to a javascriptcapable browser. Ac30 provides the ac30 top boost sound, classic rock gives you the classic crunch sound of a ukmade 100w amp, metal delivers the extreme highgain sound of a usmade amp, and bass is designed specifically for bass. Ac30 top boost modification circuit for above 1961, download diagram. But do not start with an ac30 from scratch as your first project. At the moment, im using some of your ideas rebuilding a pignose g40v. Ac15 reissue pre amp schematic, ac156002 iss 1 vox, 1996. My vox ac30 cc2 has lost speed control on the tremolo. While the partial schematic above only hinted at it, i purposely kept it out of full view until now.