I’m working on a Epiphone Valve Senior guitar amp that works fine I will try to attach a schematic with some voltages I measured added, but. 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. Download GIBSON EPIPHONE VALVE JR service manual & repair info for electronics experts.

Author: Mazulmaran Grosho
Country: Liberia
Language: English (Spanish)
Genre: Finance
Published (Last): 16 August 2004
Pages: 187
PDF File Size: 6.49 Mb
ePub File Size: 3.15 Mb
ISBN: 260-4-52782-931-4
Downloads: 37490
Price: Free* [*Free Regsitration Required]
Uploader: Mejind

This will transform the reverb from “Out of control, Useless, Over the top” to just about the best tube driven reverb circuit you’ve ever heard.

You can experiment with different values for that resistor, but i think 22K or 33K is where it’s at. Advertise on the most comprehensive and widely viewed musicians’ website. First checked that all plate voltages did not change with the signal output dropping.

I like to use audio grade electrolytic caps when possible. I have a “recipe” that I’ve been dying to share. Lately I have gone more in the acoustic direction so I haven’t really looked around for amps in a few months. Looks like Epi is putting out a new head to compete with the Ceriatone 18watt clones, the 15 watt Blackheart, and the Orange TT.

I would also vote for oscillation. We’re trying to work out which section of the amp has the problem. For your reference, what I’m mostly using right now: Posted 11 September – It is serving no purpose.

Can you repost the schematic? I put a few notes on the schematic one of which says when I touched the VOM probe to junction between the cathode pins on V3 it caused the same effect as turning up the gains.


Delete From Topic The post will be removed from this topic completely. I presume you meant C24? The one in your first post is not working. As I’m running them right now, I think I might like just a little bit more clean headroom, but I am running the preamp tube a little hot, and I can make a huge difference by simply rolling back my volume knob on my guitar L.

This can be very “boomy” sounding, but the factory Valve Sr. Log in or Sign up. I bought one just because they were cheap and getting allot of press. I saw a bitmo mod for the Junior to turn it into verb-unit. A value of 2.

As always any suggestions are much appreciated! If you schemaric like the sound of the reverb in your Valve Senior I wouldn’t reuse any of the parts to make a Valve Jr into a reverb unit. A handwired Senior with a handwired reverb on top is a nice dream rig.

I really have no idea what I’m doing, but what I’m doing seems to work.

Epiphone Valve SENIOR

Experience is something you get, just after you really needed it. Then put it back on standby for a few seconds, take it off standby and it comes back to life until the gain reaches a certain level.

Tubes make a HUGE difference. Does the problem still occurs? I am using a 33K in both of my Valve Srs. After all of these issues are addressed, you can, if you feel the need, tweak the “Voicing” of the amp. Can you tell me anything about the 4 resistor array at that location? The first is that if you don’t know what you’re doing, they can kill you. The SoCal is just too loud for the house.


Board Classic Stanton Language: I have a Valve Sr combo way out of warranty that the head sounds like the opening 10 minutes of “Saving Pvt. In this way you will learn at least at which stage the problem appears. You will not be disappointed. Let me know if this helps you, and if anyone else has anything to offer, I would be very interested myself. Login or Sign Up.

ShortScale :: View topic – Epiphone Valve Senior Combo Issues

If V2 and V3 are still in you’ve only eliminated the reverb. Anybody suggest which components I should start with to curb such a problem? This would simply involve changing a few capacitors.

We haven’t yet taken it. If I try something once, and it works, i stick with it. All tests done with reverb pot fully counterclockwise It appears the problem is in the power amp section, yet I can’t seem to isolate further than that. Originally Posted by Crxsh Jesus loves a tasty muff.

Epiphlne it is slowly turned up by either the gain or master volumes will cause the output to drop to near nothing with noticeable distortion. I love the 6V6’s so I’ll probably try the Valve Senior scyematic it hits the streets.


Epiphone valve Senior reverb

Thread Tools Show Printable Version. Can I use parts of the valve senior to do this mod? Page 1 of 2 1 2 Last Jump to page: