My high-spec ULN Wenzels have trimmers. This this thing is 16Hz high at 10MHz so it's way off. Must be sudden failure. If I use an external ref the test set is fine. OK for lab use. But a pain when out working in the field on ham repeaters. It may be an OEM number. At work we noticed quite a change in PTI product lines after MTron bought them.
-Brian, WA1ZMS/4 iPhone > On May 26, 2014, at 5:15 PM, Bob Camp <kb...@n1k.org> wrote: > > Hi > >> On May 26, 2014, at 4:31 PM, Brian, WA1ZMS <wa1...@att.net> wrote: >> >> I am trying to repair my HP-8920 RF Com test set since its internal >> >> 10MHz OCXO has aged way beyond the DAC EFC cal range. > > How far out is it? > >> (There >> >> is no trimmer cap to allow adjustment.) > > Trimmer caps went out a long time ago on OCXO's >> >> >> >> The OCXO is 10MHz and is marked PTI XO1145. > > It’s probably an OEM part number >> >> PTI no longer lists nor seems to sell this OCXO. > > They likely only sold that part to HP > >> >> >> >> Has anyone seen or have a replacement OCXO or already been >> >> done this path before? I hate to re-invent the wheel. >> >> I can buy a used A15 ref module but I still may end up with one >> >> that has an OCXO that's out of cal range. >> >> >> >> Reply off-list is fine. >> >> >> >> -Brian, WA1ZMS >> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > Bob > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.