John,
I sent an email back in 2005 explaining the design flaw for the 309
cards if you want to include an explanation on your page. Here's a
snippet.
=============
I never liked the audio board tester
because all you get is an uncontrollable amount of noise, which doesn't
help you any.
So Step 1:
Install a 10k volume pot like so...
Now you are no longer disturbing the
neighbors 10 blocks down the street.
Step 2:
When you're testing sound boards, you
want to ground certain test points one at a time to see if the noise
gets generated. The design flaw with the Kurz Kasch tester is it
grounds all test points at once, and by pushing buttons on the TF-650
it turns the sounds *off* one at a time, which is really annoying. So
to fix that, I made 4 cuts and jumpers on the 309A card so that all the
test points would be high, not low. http://rossiters.com/cinematronics/Kurz-Kasch-309A.jpg.
This at least gets the board to be quiet. The one thing I'm not sure
about yet, is how you test *all* the sounds. For example, Star Castle
has 8 sounds, but the TF-650 has only 4 buttons. So, I'm not sure if
pushing a combination of buttons generates certain other sounds, or if
I just need to ground certain test points on IC-3 with a clip lead. I
haven't really gotten that far yet. :-o
============
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Received on Wed Apr 14 12:51:35 2010
