Small audio mod?

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DarkLord
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Small audio mod?

Post by DarkLord »

Okay, I've got a specific need that I'm pretty sure someone around
here has already done at some point in time.

I use my Mega ST4 and SC1224 monitor to run my BBS, DarkForce.

I'd like to do a small audio mod to bring sound out via a plug (1/8th?)
to a small set of speakers.

Reason being, to hear pages from the "Chat" option on the BBS requires
that the monitor be on 24/7. I don't like that, even if I'm using the screen
saver.


With a mod like that, I could leave the monitor off but still hear the bell for
Chat pages.

Thanks.
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crashman
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Re: Small audio mod?

Post by crashman »

One easy mod, without being a mod, is that you could put a monitor switch in your setup.
Usually they have an audio out that you could use to that purpose...

I have one like this and it has it.
Atari Monitor Switch.jpeg
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DarkLord
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Re: Small audio mod?

Post by DarkLord »

Okay, thanks - I'll see what I can find about taking that route.
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DarkLord
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Re: Small audio mod?

Post by DarkLord »

Okay, I was told that the minus side of C35 on the Mega ST4's motherboard is audio out.

Reading schematics or ID'ing things on printed circuits is not my strong point. Can some
one point out the minus side of C35 on these pictures? The + side seems pretty obvious.

Thanks.

P1010023.JPG
P1010020.JPG
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DarkLord
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Re: Small audio mod?

Post by DarkLord »

Finally, with lots of help, I've got this installed. Even though it's mono,
it's a huge improvement over the monitor speaker. I've got a pair of
cheap Altec-Lansing speakers set up with it and it still sounds soooo
much better.

Thanks to everyone who pitched in, appreciated! :)

Mega ST4 Audio Mod01.jpg
Mega ST4 Audio Mod02.jpg
Mega ST4 Audio Mod03.jpg
Mega ST4 Audio Mod04.jpg
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Re: Small audio mod?

Post by dhedberg »

Looks good! Well done!
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