Hi Totally disabling the internal reference was a *very* common thing to do on the 5335. It often became a war of switching things back and forth (for various odd reasons). In some factories the ultimate “disable” approach was pretty drastic.
Bob > On May 17, 2016, at 10:06 PM, Tom Holmes <thol...@woh.rr.com> wrote: > > HI Bob... > > Thanks for the tip. Have been down that road with this one and it didn't fix > it. I think someone may have deliberately disabled the internal timebase to > prevent users from having anything but the house standard in play. > > Tom Holmes, N8ZM > > -----Original Message----- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart > Sent: Tuesday, May 17, 2016 7:08 PM > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Subject: Re: [time-nuts] FS HP 5335A > > Hi, > > I know this is a for sale post, but there's a jumper that needs to be there > to work with the regulator oscillator. Page 2-4 of the Operating and Service > Manual (05335-90021) details the instructions for installing the Option 010, > the 10811 OCXO. Instruction "c" is below. You'd need to add the jumper back > in. The factory jumper looks like a resistor. It may simply be cut with > side cutters on your unit. You can use just a piece of wire, of course. > > "c. Remove electrical lead (jumper), PIN 8159-0005, that connects A4U1B(6) > and U2B(6)." > > Bob > -------------------------------------------- > On Tue, 5/17/16, Tom Holmes <thol...@woh.rr.com> wrote: > > Subject: [time-nuts] FS HP 5335A > To: "'Discussion of precise time and frequency measurement'" > <time-nuts@febo.com> > Date: Tuesday, May 17, 2016, 4:38 PM > > For some reason it did not have an > internal timebase when I got it, and > throws an error, UNLESS you have an external 10 MHz > connected before you > turn it on. Then it works fine. > > > > Please contact off list for details, > > > > AND if you happen to be in Dayton, OH, this weekend for a > little ham radio > swap fest with a mere 25,000 people attending, no shipping > required. > > > > AND there will be at least a few known time-nuts in town if > anyone wants to > meet up. Make yourself known to John at the TAPR booth. > > > > Tom Holmes, N8ZM > > > > _______________________________________________ > 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. > > _______________________________________________ > 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.
