(04-20-2016, 08:40 AM)goltigut Wrote: So i really like the sound of my freshly fixed early V4 (aluminum knob version) and especially the sound it's reverb tank. I use it mainly for recording purposes. Now i'm thinking I could use it as a reverb unit. So i'm thinking about installing a dry signal mute switch so i can put any source through it and recording only the wet reverb signal. What do you think could be the best way to implement such a mod without affecting the cosmetics and the sound quality of the amp ?
http://www.ampegv4.com/images/schematics/V4.jpg
thx
Sounds Reasonable. Know that the reverb is not EQ'd by the midrange circuit though, FYI, so that control will be inactive with a simple, basic mod.
Looks like you can just break the junction of signal between R16 and C8. You can use the presumably no-longer functional polarity switch or switch location, float R16 on the junction end and use high quality shielded wire to fly a lead to a switch that will either return the signal right back to the now empty PCB pad for R16 (with more shielded cable), or said switch will instead open the circuit and hence stop all that signal--which is the dry signal.
I only looked at it for a moment, and as usual I'd let Steve/Hangman chime in as he may know a better way...been a while since I had my V4 unbuttoned, so there may be an even easier way.
Have fun! The V4 records beautifully in my experience, even at medium and low volumes, "despite" it's high power rating.