[Help required!]

These chips and soundcards are getting really hard to find, so if anyone is thinking of building one of these, now would be the time to get the chips on order. Buying new is a better option than pulling chips off old soundcards.

With a bit of confidence you can strip surface mount off boards. It often helps to clamp the board vertically and run a cow's hoof iron tip up and down one side while prising that side slightly off the board. The other side is then easy.

I keep seeing these new Yamaha with OPL cards on UK ebay for not much spondoolicks - there always seems to be someone selling them.

My link

[Retr0Bright -- get rid of the yellowing on your old ABS plastic]

Hydrogen peroxide is bleach. Look it up (I confirmed it before I made that wisecrack to avoid saying something stupid) ;)

Maybe I'm unique in this, but my Mum taught me this trick when I was a young fella over 15 years ago......

OK, maybe your mum did, but nowhere in this thread do I see a mention that you need to expose the solution and your material under UV light, otherwise you can end up with brittle material with a white bloom and micro-pits in it. What particular UV source did your mum teach you to use?

[MIDIbox FM board schematic]

Try http://www.ucapps.de/mbhp_opl3.html :)

OK thanks, I knew there must be one somewhere - I kept missing it.

[MIDIbox FM board schematic]

I am about to embark upon building this project as I have a bunch of the OPL3 chipsets, but the one thing I cannot see anywhere is a schematic for the MIDIbox FM. Does one exist?