Need Help with circuit Diagnosis (CRATE CR-112)

[Vokzel]

Hello, I am fairly new to circuits and amps, and I have an old SLM amp id like to fix. It’s my dad’s and it never really worked to well. The pots...

[merseymale]

just got one of my very own early BANDIT courtesy of eBay BUT can anyone advise, please?

There is this weird rheostat pot' (without knob) on...

[evil79]

[Sleet]

I have the opportunity to locally purchase a Peavey Austin 400 amplifier. I haven't contacted the seller yet, but I'm just trying to get a feel for this amp....

[Gretsch97]

Last night I picked up an old Rogue GS-100R Solid state amp. I was told it was not working, so I took it home and took a look at it. Turns out, all that was...

[zeke90]

Hello everyone!

I have recently in my possession an old Randall RG100HT rackmount made in USA from the early 1990. Since i live in EU and...

[Palomacy]

Hello dear MEFrs,
I'm trying to keep it as short as possible:
My Marshall MG50FX screeches when im turning any pot (except Master). Master seems...

[martyblackeye]

I've working on a Leslie 860 solid state amplifier and any advice is greatly appreciated!

Specifically, I'm working on the power supply. I've...

[bobloblaws]

Happy Canadian Thanksgiving!

I have a Yorkville (same company as Traynor) Bloc 80B solid state bass amp here. I'm curious about a note on the...

[thz52]

Folks,
I've been in a "bad romance", a mad affair with a frontman212R from a friend.
If I fix a lot of things so far? Yes. (If I...

[UltraNamron]

I have a Randall RX120R that one day developed a fault with the treble control on the dirty channel. When the pot is turned up, all the bass is cut from the...

[Tate]

I picked up a JC120 today, and the guy that sold it to me said it has a loud buzz. I bought it intending to fix it this week. I go it home, plugged it in,...

[fhtiek]

So I've got the first issue transtube bandit I use as my gigging amp. I recently moved and apparently the amp didn't survive the move.

When...

[evil79]

I've got an ampeg ba115, and i just replaced the power transistors and everything worked fine for a few weeks, and now when i turn it on, there is a very...

[Alexander Velten]

Hey dudes(and or dudets) alex here, Im relatively new to this site and would like to extend WARM and FRIENDLY greeting to the community here!

...

[mikeydee77]

Hi Guys,

I have a general question about how to approach fault finding solid state amps output stage. I would be interested to hear if anyone...

[wheatley]

hey i've got a peavey mark III musician head that recently stopped working. after months of satisfying use it started to make a loud, low pitched hum when...

[m.edwards]

I've got a friend's Fender Super 90 (solid state) in my shop now, which I've fixed before (loud popping due to a faulty solder joint on a cap). Now it has...

[shredtheguitar]

My friends and I are building an amp for a school project and we need a simple design for a solid state amp that does not include any tubes. Does anyone have...

[Agent_Smith]

Hi all!
I'm new here. Hope to have a good time here ;-) and hope you guys can help fixing my amp :-)

So, here I have this 80s Marshall...

[Zach]

I have a Spider IV hd 150 solid state head that i'm running through my old home made 2X15 bass cab but the guitar can't push those speakers so i'm looking...