Re: tech : asteroids sound question

Andy,

Is there a reason you don't want to use the original type regulator/audio
board in this arrangement? If you're hacking in an amp...why not hack in
the original unit since you're running the original Atari board? Please
pardon me if this is a silly question : )

I'm sure many of us have a couple extra of these sitting around, if you
don't have one. Let me know.

Richard (VoS)

At 02:00 PM 3/16/2001 +0000, you wrote:
>hi all..
>
>i am having a most troublesome time with an asteroids board..
>
>here is the problem, my mate has an alca 'planet' machine (bootleg
>asteroids) but is using a proper atari asteroids board. after fixing a video
>problem, and a sound problem, the board works perfectly on my testrig. The
>cabinet however has no audio/regulator board, so there is no audio amp..
>
>so we have tried to put in an amplifier, but i have a problem, asteroids
>outputs a push-pull audio arrangement, and the amplifier we have is just a
>(normal?) type, so any way we try and hook it up, we just get a loud hum
>behind the game sounds.
>
>analogue electronics is not my strong point :)
>
>i am hooking up GND and Audio1 from asteroids into the amplifier.
>
>a friend suggested to put a 1000uf cap across the amplifier inputs in order
>to 'cap couple' it? it didn't work, made the humming much more quiet, but
>hasn't solved it :)
>
>i'm getting lost, has anybody else succesfully hooked up audio from an
>asteroids *without* the aid of an AR1 or AR2??
>
>i suppose the only other solution is to build a push-pull amplifier for it,
>but that's a last resort..
>
>many thanks.
>
>Andy Welburn
>(P-man)
>
>
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Received on Fri Mar 16 12:19:48 2001