finleyville
100+ Head-Fier
- Joined
- Nov 30, 2001
- Posts
- 373
- Likes
- 13
Greetings all,
Well I finally assembled my META and am having major problems. When I try to use it there is MAJOR hum from my regulated 18V wallwart and even audible hum from a 9V battery. Also it doesn't amplify anything. Even stripped down without a volume pot and C2/3, I don't hear any music unless it is at max volume from the PCDP. Then it is only very soft.
I re-checked all my resistors and they are the correct values. I don't think I have the trace flaw underneath the board. My voltage offset between the +/- rails is .03V; so no problem there. Luckly I used header pins for all the panel mounted items and socketed almost everything else except C1, C5, D1, TLE2426, Rled. R8 and 9 are jumpered. I even tried switching opamps from the AD8620 to a simple OPA 2134PA thinking it was a poor soldering job to the BD adapter.
With over $125 in parts alone, I don't want to give up on this one. Any help is greatly appreciated. Thanks...
Well I finally assembled my META and am having major problems. When I try to use it there is MAJOR hum from my regulated 18V wallwart and even audible hum from a 9V battery. Also it doesn't amplify anything. Even stripped down without a volume pot and C2/3, I don't hear any music unless it is at max volume from the PCDP. Then it is only very soft.
I re-checked all my resistors and they are the correct values. I don't think I have the trace flaw underneath the board. My voltage offset between the +/- rails is .03V; so no problem there. Luckly I used header pins for all the panel mounted items and socketed almost everything else except C1, C5, D1, TLE2426, Rled. R8 and 9 are jumpered. I even tried switching opamps from the AD8620 to a simple OPA 2134PA thinking it was a poor soldering job to the BD adapter.
With over $125 in parts alone, I don't want to give up on this one. Any help is greatly appreciated. Thanks...