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Vintage threads from the first ten years
| previous: nic So I reversed the "effects loop" re... -- 3/13/2004 9:08 PM |  |
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Re: Now there is sound, but bad.
 3/14/2004 12:49 AM |
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Rick Erickson | Re: Now there is sound, but bad. Plug into the second input jack and see what you get. If the sound is clean & relatively strong look back toward the first stage. The second jack (low gain) has a switch that connects to the output of the first stage. If that switch loses contact you will lose most of the signal at the Hi Gain jack. (you will probably still get some bleed-thru signal) If the amp isn't blowing fuses I would guess the problem is NOT a transformer. The fact that the amp has been modified is a warning sign that things may not have been right to begin with. I would run a signal generator into the amps input jack and check each stage with an oscilloscope to find where the signal is getting lost. The O.T. should the last thing to suspect, not the first. Check the power tube sockets between pins 2-3 and the power tube bases for any signs of arcing. That's usually what will happen if the o.t. kicks back from a no-load condition. You must thoroughly clean or replace the sockets/tubes if they show any sign of arcing. RE |
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| nic Thanks Rick, |