The Amp Garage

What value did you use for cathode resistor on power tubes? Did you double value to account for two tubes?

your problem sounds like extreme crossover ditotion, so check output bias and negative feedback network.

I Believe the Kendrick Black Gold is basically 40-50w tweed deluxe with proper transformes (most likely from his bassman clone line a) and reverb. I would like to know how he does the verb. In a quick conversation with him, he mentioned that the verb output fed directly into the power stage. Not sur...

Is there a FET circuit in the amp? Is that what the drive is controlling? The over drive switch was engaged definitely because I was switching between clean and lead with foot switch The PA boost was on I believe. Very nice amp, just thought the lead sustain was less than a pedal in front of amp and...

Is there a FET circuit in the amp? Is that what the drive is controlling? The over drive switch was engaged definitely because I was switching between clean and lead with foot switch The PA boost was on I believe. Very nice amp, just thought the lead sustain was less than a pedal in front of amp and...

A tube in that location would be very noisy and prone to microphonics. A few of the high gain Marshall mods from the coast (Bradshaw did it) did this on a JCM style circuit. It was hell to find quiet enough tubes for that circuit location. Fets are quiet, consistent, and not mechanically sensitive....

Has anyone tried a tube stage on the front end instead of the FET? If linearity or output impedance were a cocern you could use local feedback on one half the tube followed by a cathode follower. Based on other threads it looks like its a 20dB stage, and I have seen at least one report that an op am...

Strato,

When you made those recordings did you use a Les PAul or a Strat?

Bridge or Neck pickup?

Very nice tone, I really like the "stringyness" of the TW for chords.

I think the whole "class A" debate boils down to semantics. Loose definition of class A = both push pull tubes always conducting and flowing current, they never go into cutoff. If you called a 2 tube marshall a 20W class A amp, I think you could bias it hot enough to get 20W at 400 plate volts and c...

Plexi, I am not sure if you mind me asking (I dont care about the minutia either) but I built an express on a JTM45 years ago and always thought it was waaaay too bright. I ended up with a 0.0047uf and 160K on 3rd stage, along with a whole bunch of other stuff. So my question is what was the restor ...

Ron, I read some of your comments and looked at the Climax clean chanel schem and was a little confused. You said the power tube coupling caps were small, but they show 0.1 uF? Also the large value slop resistor shows 100K (I dont think its 18K on clean ch), which is standard blackface, albeit with ...