Friend asked me to fix this NADY TMP-2 Tube Mic Preamp

[AUDIO FREQ]

I have never seen these before. Not much about them online. I can see some of the caps are bulging, but they test within tolerance with my capacitance meter.

I am still going to order and re-cap all the electro's, as they look really old and some of them are bulging at the top.

Problem is, the signal is very weak. The Tubes are good, all caps test in tolerance...

Tried looking for a schematic online, but no luck. Anyone out there have any experience with these things?

 

[Khron]

Kinda-sorta resembles the SM Pro Audio "tube preamp" i tore down & modded to hell and back, a few years ago. There's a few posts about that on my blog, see if any of it happens to be useful?

 

[pucho812]

Bulging caps have to go.
There is no reason to keep them.