[time-nuts] newbie question Thunderbolt supply
golgarfrincham at yahoo.com
Sun Aug 26 02:25:25 UTC 2012
>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.
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