[time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

Dr. David Kirkby (Kirkby Microwave Ltd) drkirkby at kirkbymicrowave.co.uk
Sun Nov 30 12:14:45 EST 2014


On 30 Nov 2014 16:17, "Bob Camp" <kb8tq at n1k.org> wrote:

> > 1) Z3805A http://www.ebay.com/itm/251527236609
> > * 16 channels
> > * double oven
> > * dual outputs
> > * $499 + free carriage
> >
> > 2) Z3805A http://www.ebay.com/itm/271324714268
> >
> > * 8-Channels GPS Receive
> > * 6-Channel GPS Parallel tracking
> > * double oven
> > * dual outputs.
> > * $399+ carriage, so probably the same cost as #1 above
> >
> > Why do #1 and #2 have the same part numbers, but a different number of
> > channels??? One has 16, the other 6/8.
>
> There are multiple versions of the 3805. There are two GPS modules in
them and two OCXO’s. You mostly see them in pairs (260 OCXO with Furuno GPS
/ 10811 with Motorola GPS).

So what GPS module is the best?  Furuno or Motorola? Does the number of
channels indicate the module? You have given me half the information I was
looking for,  but not really supplied enough for me to make a decision.

I will try to get them to give me a photo of the actual item.

Dave


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