Digitech RP20 Valve schematic

[stevenrb718]

Anybody have a schematic for the Digitech RP20 Valve pedalboard? Mine was working, then it started to seem to "have trouble" staying on, where...

[vegaluthier]

Hello, technician friends! Long time no see!

I have this engl all tube amp and it turns on, and all valves seems to turn on normally but it...

[ScoopMyMidsDaddy]

Alright so I got a weird one here. I bought this for dirt cheap from a guy on fb marketplace that didn't know too much about tube amps. He said it worked...

[begginerampguy]

hello! I am new to guitar amp building and have some questions about how to go about building amps.

1. how do I figure out how much voltage I...

[Shrimpfarmer89]

Hello, I have some questions about building an amp with sections from a few different amps. Would It be possible to take a solid state pre amp, add a graphic...

[stevenrb718]

Got a Bugera 333XL Infinium that powers up but doesn't produce any sound. After a short time all 4 of the tube indicator LEDs on the back light up. Anybody...

[TheAndyEngineer]

I've recently acquired a HIWATT HI-GAIN 50 model tube amp which sounds great

The issue I'm having is that the reverb control doesn't seem to...

[Joe Picker]

I've had this little amp for years and finally dug it out of the pile and started playing it. Good tone, cool tremolo. What the heck is it? Image:
...

[CoopDaKill]

Hi. I have a Gibson Falcon tube guitar amp, Model GA 19 RVT. It has no reverb at all. When I turn up the Reverb pot, I get increased volume, but no reverb...

[ThermionicEmissions]

Hello everyone, this is my first post to the MEF. I'm not an electronics tech, but I'm slowly learning more about tube amps as I find it all very fascinating....

[khjng]

Yesterday, I found out that my amplifier Kustom Contender doesn't work...

When I turn on I hear something hit sound as usual when it is turned...

[antimisti]

Hi, i,m from Perú and i have some issue with my head carvin mts3200; i was using it normaly( no problems or issues) so then yesterday we had a rehersal...

[avoverdu]

Hello guys, Im new here in the forum. I bought a Marshall Valvastate VS100R with reverb for a few bucks that has a hum issue and I need some help/advise....

[emi2345]

Hi there, I've drawn up a design for an amp, which will be my second build and the first for a friend of mine. It's a normal 5E3 but with an additional preamp...

[ThisSiteNeedsHTTPS]

Hello all,

I recently purchased a Fender Hot Rod Deville 212 off craigslist used in Indianapolis. I have video of the symptoms below:
...

[antimisti]

I bought a carvin mts3200 head and it came with 3 el34 and 1 6l6 mesaboogie in the socket v9-6l6gc, I did not realize that when I bought it, I have it in...

[Androgel]

From Andrew in Toronto - actually a pinch north of Toronto in Richmond Hill, but I CAN see the CN tower from Yonge St, where I live lol

...

[jeffects]

I just overhauled a vintage Fender Princeton Reverb (not a reissue) that was found in an attic and hadn't been operated in years, and of course replaced all...

[ejc6stringer]

So, I've had a Bugera 333XL for a few years and I've never had a problem. Last night I turned it on and now I have a problem. The clean channel is perfectly...

[teletwanger48]

I recently acquired a Fender Cham 12 in dead mint condition. This one looks exactly like a blackface with the silver grill cloth.

. It is...

[Tone Meister]

I wasn't sure whether to post this here or in Mods and Tweaks, but since I have a Cambridge 30 with Cambridge-itis I chose to post it here. I am an absolute...