(first off, sorry for the redundancy of my posts, but I have beed advised that I could get more help in this forum)
I have a DIY guitar amp (a mesa/boogie 2:90 copy), and it has a problem.
One of the switches produces a rather large popping noise (from the speakers) when turned off.
Its not the main power switch, the switch increases or decreases the cathode voltage on a 12ax7.
I believe it's because of internal arcs inside the switch.
Installing a 10nf capacitor on the contacts did not remove the popping, and either way, the high end frequencies are compromised.
I have read here and a few other places that a contact suppressor and a vdr might help.
I invite you to read the discussion I had on the "Everything Else" forum, it contains schematics that could help you help me:
http://www.diyaudio.com/forums/showthread.php?threadid=1236
thanks in advance,
Lwi
[Edited by lwi on 11-23-2001 at 12:52 PM]
I have a DIY guitar amp (a mesa/boogie 2:90 copy), and it has a problem.
One of the switches produces a rather large popping noise (from the speakers) when turned off.
Its not the main power switch, the switch increases or decreases the cathode voltage on a 12ax7.
I believe it's because of internal arcs inside the switch.
Installing a 10nf capacitor on the contacts did not remove the popping, and either way, the high end frequencies are compromised.
I have read here and a few other places that a contact suppressor and a vdr might help.
I invite you to read the discussion I had on the "Everything Else" forum, it contains schematics that could help you help me:
http://www.diyaudio.com/forums/showthread.php?threadid=1236
thanks in advance,
Lwi
[Edited by lwi on 11-23-2001 at 12:52 PM]