It looks rough, there's a cesium standard for sale in the UK, time nuts member perhaps, that's sat at a quarter of the price, I know which I'd buy.
On 24 Feb 2018 10:46, "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.
