[36] Epiphone Valve Jr.

Date: August 2nd, 2007 | Comments : [20] | Categories: amps.

Epiphone Valve Jr. head

My new Epiphone Valve Jr. amp head

I just bought a new tube amp head that is prime for some juicy mods! Priced no more than many effects pedals, the Epiphone Valve Jr. is an excellent buy. I got this one for $129 with free shipping.

The amp is well made and solid, not at all like I would expect for such a bargain priced item. The design is a basic 5w all-tube guitar amp that uses a 12AX7 and an EL84.

I had read that this amp had humming problems so when I first turned it on, I was amazed that it was stone quiet. I kept looking at the panel light to make sure it was working, and even checked the speaker cable to see if I had forgot to plug it in. Nope, this little beast is very quiet and hum-free. I later discovered that the tube heater filaments are now powered by DC instead of the AC used in the first versions of this amp.

A quick jam session with it driving a 2 x 15″ speaker cabinet proved it to be a capable performer. It’s not as loud as my own homemade EL84 amp but it has some nice sounds.

The best thing about this little amp is that it has plenty of room in the chassis for mods and additions to the basic circuit. A tone control would be a good feature and I can think of numerous other changes that would make it even better.

Buy one of these amp heads, even if only to add a line-out to use for overdriven tube sounds. I will have an article soon that shows how to add this feature along with all of the other mods I make to the Epi Jr.

While you are waiting for my mods to be posted, download the schematic to this amp and look it over.


20 Responses to “Epiphone Valve Jr.”

[50] Robbie Wallace Says: 1:48 pm, August 3rd, 2007

I played through one of these at the local Guitar Center a few weeks ago and was blown away! Loud, punchy, and awesome tone.

I may very well pick one up myself I was so impressed.

take care,

[66] jack Says: 10:24 pm, August 30th, 2007

Bought one of the combo versions. Changed heater filiments to DC and it’s very quiet. Love that amp. Put it in a recoding room w/ a decent mike and you won’t believe what it sounds like on tape!!

[68] Scott Says: 2:24 pm, September 10th, 2007

Those are cool amps.

If you are looking for a nice little 5w combo to fool around with, check out the little Crate Palomino. Tube sounds in a little package, ready for your mods.


[70] WGTP Says: 12:23 pm, September 11th, 2007

Jack, it appears from your schematic, that you have one of the new improved ones that has the output transformer that matches the el-84 better, as well as some other improved part values. It will be interesting to see what you come up with.

[73] Ed Says: 7:22 am, September 14th, 2007

Hi,how can i recognize the new improved ones from the older ones?

[252] MaMartyMrtyMart Says: 7:55 am, November 28th, 2007

Hi, bought a couple of the combo’s about a year go, added a master volume control and various suggestions from the 18watt forum.
Also changed out the OT’s for hammond type 125C’s.
They sound incredible now !

[256] TWANG Says: 3:57 pm, December 6th, 2007

I have two. V2 VJS.. both modded with help from Sewatt and Epi forums and more.
Using Hammond 125 ESE and Weber transformers, both sound really great.
I’ll be ordering parts from you folks soon.. I definately want to do more with pedals and a scratch amp build.
Nice thing about these epis.. clean front panel for what you want to add!
thanks for being here.. great stuff!

[417] Denys Jackson Says: 3:50 pm, April 30th, 2008

Thanks for your detailed schematic of the VJr.

This particular (http://www.muzique.com/news/images/Epi1.gif)Epiphone Valve Jr Schematic you have, has a problem with the rectifier diodes.

The way it’s drawn up… one of your diodes would not function in the rectifier.

[418] admin Says: 5:34 pm, April 30th, 2008

I fixed the diode polarity, thanks for pointing that out.

[520] Шиш-Кин Says: 10:25 am, September 7th, 2008

А это Вы написали на основе исключительно Вашего личного опыта?

(Translation: And you wrote that solely on the basis of your personal experience?)

[521] admin Says: 9:35 pm, September 8th, 2008

@Шиш-Кин: As with all my articles, I write from experience playing or testing the equipment that I feature… I own the amp shown in the picture above.

[647] k white Says: 7:34 pm, April 6th, 2009

been using the valve jr head-cab in live band practice with a marshall guvnor d petal.i vas so impressed used it at the gig.i havent had to turn up past 12oclock for stage vol with theamp in the house and monitor sounds huge with lots of harmonics.it can be brightened up nicely with the pa eq.i would like to modify but dont really have a clue what i want

[685] Nick james Says: 7:23 am, April 24th, 2009

i actually just picked this up myself last week and have to gree that the tone is unarguably impressive for such a small simple design. and ive been using a tube screamer pedal along with it. i would have to say this is well worht the 185 i spent on it.

[1271] stagedive Says: 10:03 am, July 27th, 2010

I have had a Hofner, a Rick, a Fender and several others. Nothing compares to Epiphone Valve Jr. Easy to play, great sound and tone

[1763] Dave Says: 8:08 pm, December 13th, 2010

Guitar Center Currently has the Epiphone Valve Jr Combo on sale for $79.99. It has to be the deal of the century!!!

[2059] Pigeoncam Says: 7:43 pm, February 7th, 2011

I was thinking about adding a choke to my EVJ and I understand that it goes in place of a resistor in the power section but I can’t find any info on which resistor it should replace. Any suggestions?

[2270] david Says: 4:33 am, July 26th, 2011

Would it be possible to tap a headphone output from V1A or V1B?


[2636] rugeb Says: 10:20 am, February 12th, 2012

Hi Jack,
The schematic it’s a Version 2 or Version 3?.

[2637] admin Says: 9:09 am, February 13th, 2012

I believe it is a version 2.

[3565] David Mac Says: 9:07 am, November 5th, 2012

Hi, Jack. Was there ever any progress on a line out mod?


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