correct voltages, no sound

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correct voltages, no sound

Postby malcolm » Thu Jul 28, 2011 11:46 am

Hi all,

Just finished two J99s. They powered up fine in testing and I set all the voltages correctly, I didn't add the servo yet because I wanted to minimize my sources of error before i was sure the thing produced sound. Then when i went to test it out with a mic, no sound whatsoever, and not to say that there was noise, just nothing no matter where the gain knobs were.

Any ideas what could be the problem?

thanks
malcolm
 
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Postby malcolm » Tue Aug 09, 2011 5:27 pm

reflowed everything, still no sound. please help?
malcolm
 
Posts: 3
Joined: Thu Jul 28, 2011 11:38 am

Postby Randyman... » Fri Aug 12, 2011 5:40 pm

I'm not Tim, but are you saying you are trying to test your J99 w/o the 990 Op Amps installed? I don't believe the J99 will pass any signal until the Op Amps are installed. If your voltages are OK at the Op Amp +/- sockets, you should be OK to plug them in AFAIK.

:cool:
Just trying to get by...
Randy V.
8x A12; 4x N72; 2x J99; 2x C84
Randyman...
 
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Location: Houston, TX


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