[time-nuts] HP-58503A

Andy Bardagjy andybardagjy at gmail.com
Thu Jan 1 12:03:21 EST 2015

Sounds like the GPS receiver is hosed. I think there are two different receivers used in the 58503a, unfortunately I'm away from my lab, otherwise I could check mine. It is a standard part, and may be available on the surplus market. 

Before replacing, I'd check the usual suspects, power supply health (look for failed electrolytics) and re-seat the gps board to board connector.  

Happy to measure things on my 58503a. 

Andy ◉ Bardagjy.com ◉ +1-404-964-1641

> On Dec 30, 2014, at 12:35 PM, Richard Thorpe <kissov29 at gmail.com> wrote:
> This list was recommended to me by the elecraft list.  I have an HP-58503A sat disciplined “clock” that puts out a steady 10MHz to my K3 radio.  Its been working 24/7 for years, I monitor it with David Anderson's Mac GPS Control X software on my iMac. Several days ago error messages showed up i.e.: Health- err, Self Test-err, Int Power- OK, OCXO- OK, EFC-OK GPS RCV-err. Its not tracking any sats and now I cannot event communicate with it at all even with a simple com program.  Is there anyone out therE who can fix these things?  Any suggestions would be appreciated.  Thank you.
> Richard Thorpe K6CG
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