Old color and a little expensive only one partial pictureBert Kehren
Sent from my Galaxy Tab® A -------- Original message --------From: Bob kb8tq <[email protected]> Date: 2/24/18 9:30 AM (GMT-05:00) To: George Atkinson <[email protected]>, Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] Curious, how many t-nuts have 5065A Hi The “pickup only” part of the deal would be a bit of an issue for some of us :) Bob > On Feb 24, 2018, at 5:46 AM, George Atkinson via time-nuts > <[email protected]> wrote: > > There is one on UK ebay at the moment but its not being given away. From the > one partial photograph it looks a bit rough. > > https://www.ebay.co.uk/itm/HP-5065A-Rubidium-Frequency-Standard/183057846558? > > Robert G8RPI. > >> >> On 24 February 2018 at 10:02 John Miles <[email protected]> wrote: >> >>>> >>> Hi >>> >>> Well, if anybody else is “giving away” 5065’s I’d certainly be >>>willing to >>> “accept” >>> one :) >>> >>> Bob >>> >>>> >> Be careful what you wish for. :) The unit Pete is talking about is a >>1969-era model, in nice overall shape but with the usual bad capacitors on >>the oven controller board. The lamp oven winding should be about 50 ohms >>cold, but is closer to a dead short. It will take a LOT of work to restore to >>working condition. >> >> The failed controller ran long enough to smoke a 1.5-ohm 1W resistor, >>1N400-something diode, and eventually the 1A line fuse ( >>http://www.ke5fx.com/5065A_A11_sm.jpg ). Needless to say the lamp PCB looks >>like something out of Fukushima. It'll need to be rebuilt from scratch after >>rewinding the heater. >> >> Seriously -- anyone with a 5065A who hasn't checked/replaced the caps on >>A11, don't let this happen to you. They aren't making any more of these >>puppies. If the caps on that board are original, don't bother to check them, >>just replace them, as Luciano suggests at >>http://www.timeok.it/hp5065a-corner-3/. No need for exotic parts, just put in >>whatever you have that is somewhere close to the original values. >> >> Not a bad idea to verify the ESR of the new parts you're installing as >>well. >> >> -- john, KE5FX >> Miles Design LLC >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
