i recently acquired a 1971 ampeg vt40, the guy i got it from said that it smoked or smelt bad or something, but would amplify a guitar fine. i took it home, fired it up and it made a loud hum. my dad who's an old jazz rock keyboardist (who used a vt-40 for a rhodes) insisted that it was no good and had me proceed with taking it apart and cleaning the tube contacts.
I noticed a master volume that was soldered into the main boards inside. could that have roasted the amp?
anyway, we cleaned the contacts and made her look nice then put it all back together. when we then attempted to fire it up again, it made no noise, and does not register a signal from an instrument or any frequency...so that was a waste of money...
dad said to replace the power tubes as they were microphonic. i bought two matched JJ 7027A's and the damn thing still wont make noise. before i pay $150 to have an amp guy 'look' at my amp, i was wondering if any of you guys might know what is wrong.
Thanks much, Sean Murphy
I noticed a master volume that was soldered into the main boards inside. could that have roasted the amp?
anyway, we cleaned the contacts and made her look nice then put it all back together. when we then attempted to fire it up again, it made no noise, and does not register a signal from an instrument or any frequency...so that was a waste of money...
dad said to replace the power tubes as they were microphonic. i bought two matched JJ 7027A's and the damn thing still wont make noise. before i pay $150 to have an amp guy 'look' at my amp, i was wondering if any of you guys might know what is wrong.
Thanks much, Sean Murphy
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