Output tube matching pot on ultralinear fender super reverb (and fried screen grid resistors)

[judge734]

I just picked up a 1979 Super Reverb off Facebook for cheap. I used it for a few weeks never turning the volume above 3 and it sounded great except there...

[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...

[Moony]

Hi,

does anyone of you know, if there's a simple way to bias the 12BH7 in the new Blackstar HT-5R MKII like there was on the older model (voltage...

[Contech]

Hello Friends,

I have an interesting bias problem that I can’t figure out. I have a late 60’s Twin Reverb on my bench. It’s just a simple tune....

[peeler]

Hi all,
I am new here and I have scoured forums etcetera for an answer to adding independent bias for each 6V6GT in a tweed 1958 Fender Tremolux 5g9....

[Pennypicker]

I have a 94 Fender Twin with external Bias test. I have pulled the two inner 6L6 tubes to lower the wattage down to 60 watts per manual instructions. The...

[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...

[bobloblaws]

I have a 68 Twin Reverb, AB763 circuit. The plate voltage is 460V. The target 70% max dissipation calls for about 45mA current per tube. When I turn up the...

[Djizix]

I've replaced the mains inlet pcb and power transformer. Previous owner had a 25a main fuse in it and fried them both. They were relatively simple to repair...

[arbous65]

Hi there,
I am new to this bias adjustment concept. I read a few websites and followed two pages of instructions by Reeves Amplification.
Unfortunately...

[boz_j]

Hi guys,

In first, english is not my first language, so I hope write best as possible to be understandable and not boring

...

[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...

[John R Smith]

Good afternoon from Cornwall. I am new here, but I have called in to pose a question regarding my little Fender Princeton '65 Reverb reissue amplifier. I...

[isaac]

Hey, I'm building a 50W two el34's and I have Power transformer that doesn't have a bias winding, just a standard high voltage 290-0-290. So I used a standard...

[GuitarZombie]

Howdy Folks
New here, but everyone seems to be pretty helpful with each other and knowledgeable. Here's my question:
A Univox 1221. Replaced...

[sebagitara]

Hi all, i have a marshall tsl122 combo amp that i bought second handed. Amp is about 12 years old and my bias is constantly rising as the amp worms up but...

[ozymandias]

I’m hoping one of you kind souls on here can help me out with a problem with this amp. My experience of working on amps is very limited, but so is my budget...

[judge734]

OK, I have a 1960s Ampeg Rocket 2 that I picked up really cheap. it is all original and everything on it works and sounds great. The tremolo on it works but...

[AndyM]

So I found this old Traynor rotting away in the corner of my basement; it's got a great sound, but it's impossible to push it into overdrive without bursting...

[edde]

I need to locate the "raw bias supply" in order to install a power scaling kit.

""Raw" bias is the value of the supply...

[NorCalTuna]

Soooo... I built this amp for a buddy in a cheeeeap chinese amp, hoping to reuse the chassis and faceplate and speaker (maybe). My intention was like- i'll...