Art, 

Thanks for the info.  Please do put me on the list for updates.

Fred

> On Jun 21, 2021, at 8:55 PM, Art Sepin <a...@synergy-gps.com> wrote:
> 
> Hi Fred,
> 
> I apologize if the following smells overtly commercial; it's only intended to 
> answer your questions and explain where we are in the process of producing 
> GPS replacement products for legacy timing instruments.
> 
> The 6 and 8 channel Motorola VP and 8 channel UT+ will not work as 
> replacements. Those products have also reached their 1024 Week-Roll Over 
> limits. The HP Z3801A and Z3805A products only respond to 6 channel commands 
> and produce 6 channel reply messages.
> 
> We have developed single-board clones for the Motorola VP and UT+ products, 
> as drop-in replacements, that are lower in cost than Synergy's 2-board 
> Adaptor Board products (Shooting for dropping to less than $190 if component 
> prices don't go even higher!). The SSR-VP can plug into the HP Z3801A and 
> Z3805A products. 
> 
> A different part number SSR-VP designed to drop into HP 58503A and an 
> SSR-UT+, designed to drop into HP 58503B products, have also been completed 
> but firmware for those have yet to be tested in actual instruments. With the 
> proper firmware loads, the SSR Drop-In products should be candidates for 
> upgrading many other legacy timing instruments. 
> 
> We had planned for the single board "Drop-In" products to be available near 
> the end of 2020 but COVID-19 changed things for us. We are now planning a 
> small production run to satisfy folks that have already been in touch with us 
> but we need to complete our boot-loader for firmware updates first. With 
> current work load, I'd estimate 90 - 120 days for HP Z3801A and Z3805A 
> replacements. If you are interested we can put you on our list. 
> 
> Apologies for the quasi-commercial intrusion!
> 
> Art
> 
> 
> -----Original Message-----
> From: Frederick Bray <fwb...@mminternet.com> 
> Sent: Monday, June 21, 2021 7:21 PM
> To: time-nuts@lists.febo.com
> Subject: [time-nuts] Z3801A Receiver Replacement
> 
> I have a HP Z3801A with a dead GPS receiver.  I understand that it is 
> possible to drop in an Oncore VP 8 channel receiver as a replacement -- not 
> withstanding the fact that the Z3801A will only see six channels.
> 
> I see that Motorola R5122U1154 8 channel receivers are available.  Does 
> anyone know whether this will function in the Z3801A?  I'd like to get it 
> working again.
> 
> Thanks.
> 
> Fred Bray, KE6CD
> 
> 
> 
> ______________________
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