Hi Has anybody actually measured the supply sensitivity on the -12 volt line to see weather a 5 volt change makes any noticeable difference in the output frequency? The power on -12 is very low, so there should be negligible thermal impact from a change.
Bob On Feb 26, 2010, at 4:52 PM, George Dubovsky wrote: > The -12 can be anything from -7 to -12V and it will work. The units that > were removed from Grayson or Andrew equipment had a zener diode changed on > the Thunderbolt (by Trimble) that kept the power alarm from being invoked at > low values of this voltage. > > 73, > > geo - n4ua > > On Fri, Feb 26, 2010 at 4:47 PM, francesco messineo < > francesco.messi...@gmail.com> wrote: > >> Hi Stan, >> >> On 2/26/10, Stan, W1LE <stanw...@verizon.net> wrote: >>> Hello Francesco, >>> >>> After connecting to a known good power supply, active antenna, and >>> computer, >>> give it a chance to warm up and stabilize. >>> >>> After warm up, I get: >>> +5VDC @ 0.250 A >>> +12VDC @ 0.12 A >>> -9VDC @ very low current, just barely moving the meter... >> >> >> it's actually +5V,+12 and -12V. >> Are there different versions? Mine works fine with these voltages, >> seen the requirement on the manual. >> However it completed the self survey two times and I set the save >> position flag. As I said I have one unit working fine, so I know what >> to expect from it. Each time the power goes off, it is reset to all >> defaults and eeprom is reported corrupted. >> I'll try an hard reset however. >> >> Thanks >> Francesco IZ8DWF >> >> _______________________________________________ >> 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. > _______________________________________________ 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.
