The Amp Garage

Structo wrote: What amp is this?
4x 12ax7, does it have reverb?

Its a bluesmaster with one tube reverb

But each 6L6 uses 38mA and each 12AX7 only 1mA

So, 150mA for B+ would ve enough , right?

Measure the heater voltage to make sure it's not being pulled down somewhere. If it's alright, and your B+ also measures alright, It could be that it's normal - on our small amps the 6L6 tubes are right near the power transformer and the combined heat does make the chassis, transformer body and any...

I have 458VDC in the first filter (didn't Get the "light" sentence, sorry)

M Fowler wrote:Wound improper.

So eventually it would die (soon)??

Why would a power transformer with heater consumption of just 60% of maximum heater current from transformer... And everyother voltage measuring right get HOT

I mean hot hot

Is it just about to fail?

I use 2x 6L6 and 4x 12AX7
PT gives 690v 150mA, 6.3v 5A, 5v 3A

Hi,

I was wandering what difference would be having the Eq between V1a and V1b versus having it after V1b (between V1a and V1b it would be only a "gain/Clean" pot)

it has TO MANY SWITCHES

1.- channel switch
2.- boost or PAB (dumble like)
3.- mid (dumble like)
4.- bright switch for clean channel (3 positions)
5.- not used sofar
6.- bright switch for OD channel (3 positions)

after some testing and modding this is what I get

http://www.youtube.com/watch?v=scYN8KIE64Y


super NASTY amp!

well, the OD channel (the 3rd and 4th stages) well completely dumped... redesigned I went with the OD way of overdriving the signal ... but changed the coupling caps and also (very important) the CATHODE resistors into a Trainwreck-ish third stage and a simple fourth stage , which in results gets me...

LeftyStrat wrote:Have you tried dropping the third stage and just having Fender v(a+b) -> TW stage three?

From my second stage : 2.2n with a 250k-A pot into the "third stage" of the TW?

roberto wrote:Replace everything you have between 2nd and 3rd stage with:
10nF 150k 47k voltage divider. Try also different coupling capacitors.
Then try a grid stopper to the 3rd stage, 33-220k range.

10nF, 150k to ground and 47k as grid stopper?

Well this is what I tested:

https://www.dropbox.com/s/dae83yktqamq7 ... 20test.jpg

Sofar it has a lot of gain (as expected) And lots of output, BUT it seems also that Its to much signal for last stage and sounds a little gated (Fuzz like)

What should i do?

Will keep posting results

Master Vol pre-Pi/post third stage is Baned??!

Has anyone tried it ?

I'm going crazy modding a Fender-ish amp with what was a dumble Overdrive which wasn't for me

Thanks a lot!!!