About 2 years ago Gamba and I collaborated on making a ROM SIMM to
fit the SE/30, which had the IIci ROM code on board. When we were
nearly done we discovered that the ROM SIMM in the SE/30 is around
.050" thick, whereas all the modern PCBs and commonly available
laminate stock is .062" thick.
As it happens, the circuit boards for 30 pin SIMMs are also .050" thick.
Anyway, I found that this seller on Ebay,
<http://search.ebay.com/_W0QQsassZstarstreasuresQQhtZ-1> has several
lots of .047" thick copper clad laminate stock. No connection,
relationship, etc.
I don't know if anyone else is making boards, but if you are, this
could be useful. I've been thinking about trying to make some IIfx
SIMMs...
On the topic of PCB making, if one starts with copper clad stock, how
does one put a photosensitive surface on it, so that one can do
photolithographic circuit board masking for etching? Is there some
kind of stick-on material? The only clue I came up with seemed to
indicate that one needed an expensive laminating machine.
Jeff Walther
P.S. Gamba, I hope you're still out there. Your mailbox is full,
but at least it's still active (as opposed to "Unknown User").
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