Speaking of filters. Thanks for putting the HP brief up. They are always a good read. Especially since these days I can afford that gear. That said many if not all of the filter material is degenerated. Its soft and sticky. At a min get rid of it. My environments clean so I leave them out. Have never found a replacement. Maybe some home depot air filter. Regards
On Tue, Sep 14, 2010 at 11:04 AM, Greg Burnett <gb...@comcast.net> wrote: > Good advice Burt. > > While we're on the subject of over-heating issues, on instruments with fan > filters, I'd like to mention the importance to clean their fan filters at > regular intervals. > > See: > http://www.hparchive.com/Bench_Briefs/HP-Bench-Briefs-1995-01-03.pdf > > Greg > > --------------------- > > Burt wrote: > ...One day whilst I had my back turned on it the pass transistor > in the power supply shorted and in turn took out most of the devices > on the mother board turning the mother board into a wind chime > vane. I was fortunate enough to find another mother board, replaced > it and it now was up and running again but still too hot in my ongoing > opinion. > > Here's what I discovered: On the rear of the HP-3336A are two power > selector switches. Instead of mine being set to 120 VAC I discovered > they were set to 100 Volts. I don't know why or how they came to be > set at 100 VAC since the instrument came from a local engineering > firm, not Japan. Maybe somewhere along the way one of the switches > simply got bumped. Anyway, it was just one position off from where > the combination should've been set. Correcting the primary voltage > selector cleared the heat problem and the instrument, with my monster > heatsink, now runs quite cool. So, for whatever little bit it might > be worth, if you think it's running unusually hot, check the voltage > selector switches on the rear and possibly the primary DC voltages > into the regulators. > > --------clip-------- > > > _______________________________________________ > 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.