[time-nuts] Re: HP z3816a DC power supply DIP switches

[Sam Bach]

Yes, from what I can tell, that is a completely different and unrelated
PSU.  Mine has no rectifiers of any kind, so it definitely can't run from
AC.  All the large TO packages on the primary side are IRFP250 MOSFETs.  I
actually found in my stash of stuff a 2A rated 32V PSU, and since it was
drawing around 1.1A cold on startup at 32V, I think that adapter will work
just fine.  Interesting to know that the serial port might be RS232.  I'll
check and see if that's the case when I get hold of an antenna for it.

Thanks,

Sam

On Wed, Mar 2, 2022 at 1:53 PM <majanoff at gmail.com> wrote:

> Just to clarify, HP z3816a that is referenced in this thread (
> http://www.realhamradio.com/GPS_Z3816A_Receiver.htm) is actually mine. I
> bought it many years ago from a gentleman in Korea and it is unusual in
> that it came with a 9 pin RS-232 connector and a 120v built-in power
> supply. I haven't measured the output of the internal power supply, so I
> don't know if it is 24v or some other value. This is the only one I've seen
> with the built-in line adaptor. I still have the unit, although it no
> longer communicates using the RS-232 connector, and I don't believe it
> locks to GPS. I'm happy to share any information on the unit which still
> produces the 10MHz output including pictures, etc.
>
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