Josh Dersch wrote:
Glen Slick
wrote:
So forgive my inexperience here -- but just to make sure I'm
understanding the changes I need to make -- is all that's necessary
just wiring up the address lines (18-21) from slot 1, to slot 2, to
slot 3, to slot 4?
Jerome Fine replies:
Don't forget that both ABs in each slot need to be wired in since each
quad slot
can hold 2 dual boards. That means a total of 8 solder joints for each
address line
and a total of 32 solder joints for all 4 address lines.
Very fine insulated wire wrap seems to be a good solution. The plastic
insulation
can be stretched after each solder joint is made to cover the wire right
up to the
solder joint. A wire stripper can be used to custom cut the insulation
at the exact
spot needed - cut a bit short and stretch the insulation after the
solder is cold. Then
daisy chain from slot to slot as needed. Start with the first solder
joint with about
2" of free wire, then custom cut the insulation to the correct length
for the second
solder joint on the same slot (second AB on that slot). It probably
helps to keep
the wires as neat as possible since the next address line is very close.
Also, just to satisfy my curiosity -- it's been
mentioned by several
people that lead-based solder is necessary -- why is this? (I think I
have a spool of it somewhere that I liberated from my grandfather's
basement some years back, but I'll have to dig it up...)
Ethan answered this much better than my limited knowledge!
Sincerely yours,
Jerome Fine