> >I think I remember comments about it being used by the DAC. Wasn't there >some mention of the TBolt working with a dead -12 supply, but only as long as >the DAC output was above 0. >
That was the conclusion. Actually the units these Thunderbolts were removed from used -7VDC instead of -12VDC. Many Thunderbolts will operate with the -12VDC line grounded but it shouldn't be left floating. It wouldn't be a good idea to run the Thunderbolt without some negative voltage on this line and where it's easy to find a triple output supply, why take the chance. The +12VDC is mainly for the oven and internal to the OXCO it goes to a +5VDC linear regulator for the oscillator circuit so the +12VDC isn't as critical as the +5VDC. -Arthur _______________________________________________ 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.
