30 Oct
2010
30 Oct
'10
8:19 p.m.
Many thanks to all who responded ( and so quickly ) and thanks for the
heads-up on the programmimng problems with the alternate parts. Also thanks
for the website of the guy who can program these parts. My programmer only
does modern parts; EPROMs and EEPROMs.
Yes I have to use the open collector parts. The old parts did not suffer bit
rot ( as is usually the case ) but rather where nuked into submission by a
huge RF E-field due to a broken grounding / shielding scheme ( may have seen
100 Volts per meter !! ).
After checking MANY empty sources found a cache of parts at
www.jameco.comfor $5.45 each so I bought a tube of them.
Thanks again for all the help.
Best regards, Steven