>After doing this, whenever a game is started, a high
>pitched whine is heard until the game ends.
Although your 4006 may be bad, that alone won't cause what you've described.
You've essentially got a gate "stuck open". You might try isolating which
sound channel has the problem by pulling the various summation resistors.
Hopefully you've got an oscilloscope.
>From looking at the schematics, it seems a bad 4006 might be causing
>some of these problems. Can anyone back this up? Anyone know where
>I can order some 4006's?
Yes, or possibly the 4030. I can spare a couple of 4006's - I'll try to get
a couple in the mail on Tuesday.
>Another thing I'm getting on both sound boards is a loud pop sound when
>the game first starts and each time after you are killed.
That's the sound enable line kicking in, and about 80% of them do that. I
haven't studied the other 20% to find out why those don't. You might be
able to solve the problem by adding a capacitor to ease the edge of the
enable signal (active low going into the preamp), since it's essentially
analog.
Alex
---- ayeckley@elektronforge.com www.elektronforge.com --------------------------------------------------------------------------- ** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org ** Please direct other questions, comments, or problems to chris@westnet.comReceived on Mon Oct 25 09:10:49 2004
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