Hello Folks,
I found in my collection a frequency standard that I acquired mil surplus at
one time.
The model number of 2N6625-078-4718 internet search yields nothing on this
number.
The unit is a common looking one , approx. 4 x 3 x 4 with an aluminum
cover that comes off.
The cover has
The model number of 2N6625-078-4718 internet search yields nothing on this
number.
Remove the 2N from the gaggle and you'll have a standard number sequence that
Google has some info
for you.
RP
..._._
Paul A. Cianciolo paulc at snet.net
The cover has the layout of the parts. The connector has 6 coax outputs
into a D type connector.
+
It sounds like the R-1051/URR receiver frequency standard. There is some info
on
repairing it here:
Ogg: [time-nuts] military frequency standard pin out??
Paul A. Cianciolo paulc at snet.net
The cover has the layout of the parts. The connector has 6 coax outputs
into a D type connector.
+
It sounds like the R-1051/URR receiver frequency standard. There is some info
frequency standard pin out??
Paul A. Cianciolo paulc at snet.net
The cover has the layout of the parts. The connector has 6 coax outputs
into a D type connector.
+
It sounds like the R-1051/URR receiver frequency standard. There is some
info on
repairing it here:
http
Good Morning Paul,
Sounds like a very old military unit. Probably 60's vintage.
before the 13 digit NSNs.
national stock number (NSN) is probably 6625-078-4718.
I do not recall what the 2N could mean.
a modern NSN would look like 6625-00-078-4718 or 6625-01-078-4718
Stan, W1LE on Cape
6625-078-4718 - * Frequency Standard Module from R-1051* and
RT-618* radios; usable as replacement or adapt to other need where
standard is required. Crystal oven with 5 MHz crystal provides 5 MHz
sine wave output (approx 1.8V) plus possible non-sine outputs dual
500KHz, 1 10 MHz. Designed
of precise time and frequency measurement'
Subject: Re: [time-nuts] military frequency standard pin out??
Hi
The gotcha here is that frequency standard is a relative term. For what
ever reason, these were a high failure item in the R-1051. People talk about
seeing large piles of them at repair depots
I used to rebuild these units many years ago and they were quite a good
oscillator - these units would be good for a few parts in 10-9 and 10-8.
73,
Bill, WA2DVU
Paul A. Cianciolo paulc at snet.net
The cover has the layout of the parts. The connector has 6 coax
outputs into a D type
They were dogs though - I worked on mine for repairing 1051 rx - seemed
failure rate was more than 50 % - took 2 or three to make a good unit! But
when you made one work they were quite accurate considering their age.
73,
Bill, WA2DVU
Hi Bob,
Yes.. that is what I am trying to find out. But
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