Hi
On May 26, 2014, at 5:54 PM, Brian, WA1ZMS <wa1...@att.net> wrote: > My high-spec ULN Wenzels have trimmers. > I doubt that HP has put a trimmer OCOX into a new design since the 10811 was new. The Wentzel ULN’s are *not* high volume parts. > This this thing is 16Hz high at 10MHz so it's way off. 16 Hz is 1.6 ppm. That’s not really all that far. If the oven failed it would be much farther 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. Renumbering all the products is what keeps the marketing guys employed… > > -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. which takes all the fun out of it >>> >>> >>> >>> -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. 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.
