Silicon investigations repairs them. Google the name for website Content by Scott Typos by Siri
On Apr 15, 2016, at 6:38 PM, John Miles <j...@miles.io> wrote: >> My signal generator has a poor, intermittent power supply. The RF >> section is ok. Who can please tell me which company can and will fix these >> older >> but excellent generators? >> >> Thanks, Ulrich > > Have a look at the capacitors in the voltage divider that drives the bases of > the switching transistors. There's a good chance that's your problem, and > they probably need to be replaced even if not. 75-TVA1607 (Mouser p/n for > Sprague TVA1607) works well. > > It would be nice to use 105C parts if you can find some, but the 85C TVA1607s > have worked well for me in multiple 8662As over several years. > > The other likely suspect is one of the large screw-terminal electrolytics on > the motherboard. The power supply can almost-but-not-quite start up when one > of those is completely open. High ESR is very likely to cause intermittent > operation. > > -- john, KE5FX > Miles Design LLC > > _______________________________________________ > 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.
