[time-nuts] HP 106B quartz frequency standard...the story so far
Magnus Danielson
magnus at rubidium.dyndns.org
Sat Aug 8 10:56:19 UTC 2009
GandalfG8 at aol.com wrote:
>
> In a message dated 08/08/2009 09:53:35 GMT Daylight Time,
> jim77742 at gmail.com writes:
>
> Unless anyone has a 2N1701 lying around?
>
>
> ----------------
> Hi Jim
>
> Going back through the archives I see you're about three volts high on
> that power rail, certainly more than I 'd expect through normal tolerances.
> Three volts though is also a bit lower than I'd normally expect as the
> headroom on a series pass transistor, assuming it is a series regulator?, so
> would still suggest checking the transistor itself or measuring the voltage
> across it.
> Loading down the output a bit more would also show whether or not the
> output is actually regulated.
Please also note that it is not necesserilly that transistor which could
be bad, but the driving curcuit may have gone bad.
Cheers,
Magnus
More information about the Time-nuts_lists.febo.com
mailing list