It has, in one of the pictures, a damaged label that says FRK so yes, I
would think that too.
It does look rather sad but could be a fun project perhaps.
On Fri, 25 May 2018 3:27 pm Bob kb8tq, wrote:
> HI
>
> Unless I’m missing something, that’s an *old* Efratom. I would not
Just spotted on eBay, a rather sorry looking GNS-500A Rubidium standard,
it's not expensive and is up for best offer, May or may not be of use to
someone?
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I recommend putting terminators on unused ports, on general principles.
But I don't
think it would ordinarily be necessary to use big-bucks terms, unless the
distro amp is
really cheaply made.
If you have access to a VNA, it would be interesting to measure the complex
transmission
coefficient
Putting in a hardware order...
Question: Is it recommended to put terminators on all unused GPS Distro
amp ports? Output ports on GPSDO and NTP servers (10MHz and PPS).
Thanks!
--
__
Clay Autery
MONTAC Enterprises
(318) 518-1389
As usual, the answer is "it depends."
If the output is a single isolated output, then terminating load not
required, but no harm providing.
If the output is a multiple output, from a single driver, through a
resistive or transformer splitter, then the level stability on all ports
and the port to
HI
Unless I’m missing something, that’s an *old* Efratom. I would not count on
it working without some significant effort. The price is right though.
Bob
> On May 25, 2018, at 10:21 AM, Clint Jay wrote:
>
> Just spotted on eBay, a rather sorry looking GNS-500A Rubidium
Hi all,
Thank you all for the precious answers and the links you sent me.
I'm studying them very carefully.
I still continue to look for the manual of the 5950 because I like to keep
the manuals of all the measuring instruments I have in my laboratory.
Thanks again
Luciano
Hi
Regarding the manuals,
I must look in my paper archive. I remember to have two manuals of two types of
those "old test sets". I have even one of the test sets in my "museum".
It will take a while to dig, as I am going to travel for 10 days.
I will come back after that.
Regards
Bernd
Dick
Thats great progress. Certainly its worth digging a bit deeper see whats up
on the antenna.
The way they sense the antenna is usually a single transistor sensing the
current and pulling a line high or low.
The micro senses that and reacts. It usually really easy to figure the
scheme out.
Bought some time around 2013 and not used if this is any use to anyone
please contact me direct. No reasonable offer refused. I also have a
5370B to go with it but that will have to be picked up in Santa Monica
CA. $100 with an A parts unit and a few spare boards rescued from the
gold
The second unit locked up and showed 4 satellites at the time I looked.
Next step is to replace the battery and see if it saves the setup.
In particular, I will be interested in seeing if it stores the date OK.
I found in the first unit what looked like a bad solder joint, but after
fixing
Board is spoken for, thanks,
Dan
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