The Amp Garage

UPDATE: I popped the resistor 10k/3W in and the amp is back in service and kicking. No shorts found anywhere before, the power supply caps are actually also new, F&Ts and ICs from Tube Depot. Heater voltage is 12V DC, filaments are in series here, so there's always 6V between the pins 4 & 9 or 5 & 9...

This particular combo amp has the below tube line up, according to http://www.fryette.com/content/45_SP30R2.pdf . There is EL84 in the place of reverb driver here in this amp. TUBE FUNCTION AND LOCATION CHART Each 12AX7 has two sections/functions. Section A is shown first, Section B is second. Facto...

Here's the peek into the VHT Pitbull 45 Combo's guts, with the blown resistor pointed by the red arrow. The boards are further from each other here than in the head. I found only one photo of this amp on a web page of a service in Philadephia, PA. Unfortunately the color code isn't clearly seen ther...

Thank you y lumox0013, unfortunately these pictures show VHT Pitbull 45 head, I'm working on combo, they look different inside per my understanding. Though they are similar.

Ok, let me explain the issue with glass cracking more precisely. It's the physical socket which is causing cracking I believe, likely the contacts are too tight. But also very good point with the heater voltage, I'll check the voltage on 4+5+9 pins to see if we're in the ballpark. The resistor I am ...

Hi folks, This is my first post here at the amp garage, what a great community. I have years of experience with fixing all kinds of musical electronics so I guess I can be also help here at the forums. Since there's very sparse info on these VHT Pitbull amps, not even mentioning elusive schematic, I...