> >Build your own PIC controlled GPS freq std.Brooks Shera W5OJM, QST July
> >1998 page 37 (how's that for an encyclopaedic memory?)
> >(thanks Google). The original seems to have vanished but Google's
> >cache of it is here
> >
> >    http://www.realhamradio.com/GPS_Frequency_Standard.htm
> >    http://www.rt66.com/~shera/index_fs.htm
> >    http://www.rt66.com/~shera/QST_GPS.pdf
> >
>
> Wait a minute. How does the Shera thing compare to an HP Z3801A ?

Not as good.
The HP has a superbly stable oscillator to start with which a home built
unit of the complexity of Brooks' unit can only aim for. That said, there
are liable to be few amateur applications where the difference would be
noticed. The HP would always be obtained surplus but is probably dearer,
larger, rather harder to repair if it breaks (as you didn't build it), can't
be as easily adapted to other uses and can't be replicated by your friends
once they see how good yours is.
But the HP has "HP" on the front (and/or back) which is always a major
consideration.


        RM

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