On Wednesday 29 November 2006 10:08, Lefty wrote:
Hi group;
What a great resource this forum is. I recently aquired a HP8601A sweep
generator on E-bay in very nice cosmetic condition. In testing out it's
function it seems to have a failure in the hi-range divider module such
that the unit works on the low range (100khz-11mhz) but not on the hi
range (1-110mhz). I've looked at the Bama manual and it points to
motorola ECL divider chips (HP 1820-0101 = MC1034P & HP 1820-0102 =
MC1013P). They give a troubleshooting procedure to isolate and test the
individual chips that I will attempt this weekend. However looking
ahead is there anyone that can identify a supplier for these vintage
ECL chips in small quanities (like one of each) at reasonable prices?
You can likely replace those with equivalent-function stocked ECL chips (in
the $5 price range). Since the chips you mention are single devices (IIRC
single D and single JK FFs), there are various modern replacements. The
replacements aren't pin-compatible, and usually come in SO package, but it
should be trivial enough to wire them in.
Cheers, Kuba
