| Author | Message | ||
     Mike Stefano |
The reverb on my HD130 is dead. It's a 2x10 with the PI tube. I've checked the tank (seems O.K.), changed the tank, used a footswitch and then (thinking the switch might be dead)shorted out the connection with an alligator clip, but it's still dead. If I rattle the amp gently, I get the reverb crash sound, so there's a signal somewhere. Have I got a bad reverb pot (turning it from 0 to 10 makes NO difference!)? On a positive note, the vibrato works great. Thanks for any help. Mike | ||
| joe |
Check the RCA jacks or wiggle at the connectors. I'm in the same boat, only it's my reverb that's dead. I have a 112Rp100 w/2100-RP chassis and the board is dated 11-29-78. I took out the RCA jack(I can put them back in) because they were not making the best contact with switching and I did the reverb the same way thinking it would help. Nothing - not even the crash noise. On a side note, Do I bias at 25mv? | ||
| Mark P. |
I had this problem, changed a .015uF poly cap (C24 on the schematic). This fixed it. The cap in my amp was a big brown Mallory poly rated at 200V. Looking at the schemeatic I can't see why it had to be a 200V rated cap. Even so, I replaced it with an even bigger 600V Sprague of the same value, just to make sure. It works fine again now. BTW, I found this fix using google. -Mark |