Best epiphone valve junior mods discussion in amps and cabs started by its been said, aug 15, 2009. This guide contains instructions for the conversion of an epiphone valve junior. Dec 11, 2006 epiphone seeks to change this sad state of affairs with its affordable valve series. To close out our epiphone adventures, this month i will show you how to add some really useful features to this amp to make it much more versatile and flexible.
Proudly handcrafted in bozeman, montana by gibson acoustic luthiers, the made in the u. Aug 09, 2014 the mercury magnetics epiphone valve junior mod. The series consists of three small tube studiopractice amps, each of which sports a single channel and digital effects. Hello everybody, i hope youve found some time to try all the mods on your epiphone valve jr. Epiphone valve junior modifications fromel electronics. However i was really only after the cabinet because i had heard so many good things about it. Mods based on version 2 dc heater head version v jr original silvergold marshallized v jr fenderized v jr notes r1 68k 1m 1m along with r2, creates a voltage divider that determines how much input signal gets into the amp. There was a guy on ultimate guitar that sold a pdf manual on all the mods with clear directions and part lists as well as lists for all the parts and mods you would need to do to get the tone from different amps like marshal, black face, vox styles. In fairness, we received an early version of the manual, and mercury. There was a guy on ultimate guitar that sold a pdf manual on all the mods with clear directions and part lists as well as lists for all the parts and mods you would. The disclosure of the information herein may pertain to proprietary rights, and the furnishing of. The valve standard dsp i tested is the beast of the bunch, packing 15 watts of class ab power into a 1x12 combo configuration. I dont have first hand experience about the valve jr, but based solely on the circuit, id say yes, it does sound good with bass if it does sound good with guitar.
Valve junior build manual v4 free download as pdf file. Valve junior conversion build manual guitar amplifier pcbs. Mercury upgrade kit 3 this project and its documentation is the result of technical investigations made by the engineering staff of mercury magnetics. Service manuals, schematics, eproms for electrical technicians. Epiphone valve special features fivewatt, class a singleended using two 12ax7s and one el84 circuit design with master volume, threeband eq, dsp effects plus separate digital reverb with level control, 10. If you are looking to get more volume by modding your valve junior, you are going to be disappointed. The valve junior is a 5 watt head that also features a singleended class a tube amp with solid state rectifier, 112ax7, and 1el84. Stock only allows half of the signal to enter r2 68k 10k 68k see r1. Valve junior upgrade kitvalve junior upgrade kit installation. Ive uploaded the hum noise, the hum is high pitched than usual. Download free pdf for epiphone valve junior amp manual. Singleended class a electronics in a funky retro cabinet.
Amplifier epiphone baby will build manual 36 pages. In june 2007 an updated head version and a version 3 combo were released. Epiphone was gibsons main rival in the archtop market prior to 1957. Oct 01, 2011 gear demo epiphone junior tube amp w gibson les paul guitar duration.
I hope you will be delighted with the tone and performance of your new amp. A somewhat limited edition of the valve junior head was produced by epiphone, dubbed the valve junior hot rod. This project and its documentation are the result of technical investigations made by the engineering staff of mercury magnetics. Where can i find schematics and the latest valve junior mods. The exclamation point alerts the user to an important operating or maintenance instruction. Ttks take on the epiphone valve junior jr hot rod edition. Epiphone valve junior features fivewatt, class a singleended 12ax7 circuit design, 8. This valve jr concept got me head first back into the diy modding scene. We created pdf versions for those of you that cant open excel spreadsheets. This one is 11 years old by the serial number and has been modified by the previous owner to give a separate gain and. I was never 100% happy with it, so simply replacing the resistor wasnt that appealing. At evolution music of orland park, we attempt to highlight cosmetic defects if any by picturing every angle of every piece of gear so you know exactly what you are getting. May, 2011 i did an negative feedback switch, the master volumegain knob and the high in put switch.
The disclosure of the information herein may pertain to proprietary rights and. I have also found that the valve jr is very sensitive to different cabinets. Valve junior head, tube guitar amp head from epiphone in the valve series. Valve junior combo drawn by mercury magnetics 032906 rev. This kit includes all the parts and detailed instructions with photos for all the following. Harley benton ga5 or legacy valve edition chassis and. A epiphone valve junior tube guitar amp head in condition. Entrance, on off, volume, hp and hp outputs an 8 eminence crown in finally mine, because i believe that there are other types of hp. I have a peavey 115 bw cabinet cheap, entry level gear that sounds great with the valve jr, but my genz benz 210 xb expensive, pro gear sounds horrible. The 5w epiphone valve junior has certainly created a stir among devotees of tubebased guitar amplifiers. I want something lower watt to run through my 50 watt carvin bel air when i dont need the volume. Despite the ultralow price, the valve junior s minimalism and retro stylings make for one cute little unit, with construction quality robust and confidence inspiring. Similar to the epiphone valve junior and valve special, it.
Baby will valve junior conversion version 4 build manual 22 september 2009 2 of 36 1. Valve junior chassis conversion guide wattkins amp forums. However, these amps can tend to be a bit noisy and sound a bit thin. View and download epiphone valve junior instructions online. Combo version 1 has front panel stripes that run along the centre of the front panel and has a 4 ohm output only and an ac filament voltage. I bought the head and cabinet together for a great price on ebay. Epiphone valve junior amplifier instructions pdf viewdownload. After these mods your amp will sound fantastic, with. Manual for epiphone amp valve junior free download.
By now, youre probably familiar with the epiphone valve jr. Pictures and images epiphone valve junior head audiofanzine. Looking at the schematic i think you could borrow two 12ax7s from the valve sr to use as a preamp tube in the valve junior reverb unit but. I bought a valve junior intending to do some of the basic mods suggested at but ive had so much fun and good results experimenting with different tubes new production, nos and jpo just plain old one step up from pos and two up from nfg i. This manual provides instruction for the assembly of version 3.
Where can i find schematics and the latest valve junior. Epiphone texan is built using a solid sitka spruce top, mahogany back and sides, with a rosewood fingerboard and bridge. Epiphone texan is built using a solid sitka spruce top, mahogany back and. The epiphone valve junior is a small 5 watt class a electric guitar amplifier. The exclamation point alerts the user to an important. Unfollow epiphone valve jr to stop getting updates on your ebay feed. The valve jr is quickly becoming one of the best selling tube amps, it has pretty good tone and the price is right. Its engineering philosophies represent a great deal of commitment to providing high quality, a rich tonal palette and substantial power.
In 2007, epiphone released a speaker cabinet that can be used with the epiphone valve junior, featuring a 1x 12 16 ohm eminence lady luck speaker rated at 70watts rms. The 5w epiphone valve junior has certainly gotten its share of press here at, being the subject of the longest single thread in this forums brief history 212 posts and counting as of today, 62006, and deservedly so. The ideas and theory at work here can easily be tweaked, modded, and applied to the modding of most any single ended tube amp similar to the vjr. Introduction this manual contains instructions to convert an epiphone valve junior guitar amplifier to a roaring 18watt amp modeled after the famed marshall 1974x circuit. The lack of tonal flexibility, the rather flat and lifeless sound and the fact that its so dependent on other tonal factors make it really unappealing to me. Introduction this manual contains instructions to convert an epiphone valve junior, harley benton ga5 or legacy valve edition into a 1418 watt push pull tube amplifier modeled after the legendary fender deluxe model 5e3 aka tweed deluxe 5e3. Its simplistic design makes for a platform that just wimpers to be tweaked.
Alnicomagnet marshall mod kit epiphone valve junior v. Tweed 5e3 pcb valve junior conversion build manual v3. Its a small amp, although bigger than what its wattage would imply as its only got 5 watts and a single 10 speaker. Oct 28, 2011 the epiphone valve special is a guitar combo amp coming from a rare place, as epiphone is known for their guitars and not for making amps.
Epiphone valve standard dsp combo amp guitar world. Thank you for purchasing a mastertone modified valve junior amplifier i hope you will. Electro harmonix replacement tubes kit for the epiphone valve junior. Kit is likely the only one on the market that can make that claim. Valve junior build manual v4 printed circuit board amplifier scribd. In january 2006 a head version was released and also a version 2 combo. All in all i think the epiphone valve junior is an admirable attempt, but it falls short of the mark for me.
It was released as a response to the extensive number of modifications that were being applied to the regular valve junior. Please read this in conjunction with the epiphone manual and observe all the safety. To open downloaded files you need acrobat reader or similar pdf reader program. Just bought a new epiphone amp and its got a serious issue with hum. Jj replacement tubes kit for the epiphone valve junior. While the amp stock has one el84 tube, the mod kit adds an additional 6v6 tube that gets blended to increase power. This manual contains instructions to convert an epiphone valve junior guitar amplifier to a roaring 18watt amp modeled after the famed. Badass power and output transformer mercury magnetics. Although, the spreadsheet contains hyperlinks to make ordering the parts a snap.
Epiphone valve junior with mastertone modifications thank you for purchasing a mastertone modified valve junior amplifier. Gibson epiphone valve jr service manual download, schematics. View online instructions for epiphone valve junior amplifier or simply click download button to examine the epiphone valve junior guidelines offline on your desktop or laptop computer. You will need a pdf reader to access the instructions. Mar 11, 2008 but while most of these mod projects have expanded the tonality and scope of the valve jr. The basics are changing the power and output transformers and adding a choke. Given its small physical size and eightinch speaker, youd be forgiven for thinking that the valve junior is a bedroom practice amp. Crank up your guitars volume pot to achieve seriously musical distortion. The next section, general enhancements, discusses changes that should be made to every valve junior amplifier to improve its performance with regard to noise, hum, and tube life. Epiphone is an american musical instrument manufacturer founded in 1873 by anastasios stathopoulos, currently based in nashville, tennessee. There are some additional filtering and component changes. After these mods your amp will sound fantastic, with less noise and be more reliable.
Epiphone valve standard dsp the epiphone valve standard is designed to provide class ab, pushpull, true vintage tone. Reverb tank mod kitthis bitmo spring reverb kit contains all the parts and instructions necessary to convert an epiphone valve junior head into a standalone, 100% tube driven spring reverb unit. Combo version 1 has front panel stripes that run along the centre of the front panel and has a 4 ohm output only and a ac filament voltage. When you buy products through links across our site, we may earn an affiliate commission. Looking at the schematic i think you could borrow two 12ax7s from the valve sr to use as a preamp tube in the valve junior. Epiphone valve junior and valve special amps vintage guitar.
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