I remembered this series from the 70's but couldn't immediately find the article. The required search term was "power supplies".
Joseph Gray wrote: > Thanks a lot for finding this. I did a search of that page for > "supply" but didn't turn this up. That is indeed the model series that > I have. > > On Sun, Aug 9, 2009 at 4:29 PM, Bruce > Griffiths<[email protected]> wrote: > >> The list price of these was $US839 and they are fan cooled. >> See HP Journal April 1975 for a description of the 62605M. >> >> Bruce >> >> Joseph Gray wrote: >> >>>> A good test would be to load it down to its rated current and voltage >>>> and monitor noise with a clamp on current probe ( on one lead) >>>> to a low frequency spectrum analyzer >>>> >>>> >>> I don't have a spectrum analyzer. I emailed a friend about using his. >>> >>> >>> >>>> Open it up and look for tell tale signs of the original equipment >>>> manufacturer, possibly on the PCB. >>>> >>>> >>> I don't find any vendor markings on the boards that I can see. The >>> main switching circuit is housed inside a metal box that would be >>> difficult to take apart. The entire assembly is built into another >>> metal box that has a removable top. Everything seems well shielded. >>> >>> I did do a test last night, using my Sony ICF-2010 shortwave receiver. >>> I can't power the Sony directly from the 13.8VDC, but I did plug its >>> power adapter into the same AC socket as the HP supply. With the Sony >>> sitting on top of the supply, I didn't notice any noise from the >>> supply on 80M-10M. I thought I heard some noise on 160M, but that band >>> was so noisy that it was hard to tell. >>> >>> If my friend with the spectrum analyzer comes through, I'll be able to >>> see some real measurements on the DC output itself. >>> >>> _______________________________________________ >>> 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.
