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 < [email protected]> wrote: > Hi Stan, > > On 2/26/10, Stan, W1LE <[email protected]> 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 -- [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.
