Re: tech : asteroids sound question

I didn't even contemplate it because AR1/2's aren't all that easy to come by
over in the UK ;)

i'll take you up on your offer tho heh :) has to be a darn sight easier to
hack in a proper AR1 than build another amp :)

Andy

----- Original Message -----
From: someotherguy <someotherguy@mediaone.net>
To: <vectorlist@synthcom.com>
Sent: Friday, March 16, 2001 2:12 PM
Subject: Re: VECTOR: 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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>
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Received on Fri Mar 16 12:46:35 2001