[time-nuts] EG&G TS-RFS telcom RB
paulswedb at gmail.com
Fri May 24 20:07:51 EDT 2013
Thanks Bob and judging from the lamp voltage I believe it. Quite a surprise
on both of them.
One is 97 and the other 99.
At least for these units we have a drop of information that did not seem to
be available before.
On Fri, May 24, 2013 at 5:42 PM, Bob Camp <lists at rtty.us> wrote:
> EG&G went to great lengths to verify the "fill" in their cells. The units
> you have should be at least as good as the large Efratom Rb's of the same
> On May 23, 2013, at 2:00 PM, paul swed <paulswedb at gmail.com> wrote:
> > Hello to the group I obtained 2 of these units at the last MIT flea. Both
> > not working correctly.
> > Virtually no documentation on the internet. I recall that 2 years ago
> > someone else asked EGG info also and no real responses.
> > That said I can tell you a few things. There is a diagram on the unit
> > shows the 16 connections. Its accurate.
> > +24 requires up to 1.5A cold and drops to 300-400 ma hot
> > +5 for the synthesizer draws a constant 300 ma
> > It seems you can start the RB up without the +5 RB and synthesizer are
> > quite separate.
> > The EGGs seem to have a fair amount of reserve RB gas in the lamp. The
> > units I have have high lamp voltages even though they were mid 1990s.
> > Both units were bad. The problem is the 470 uf @25 V 15 volt bypass caps
> > and a regulator cap 270 uf @16V. It literally fell apart when I was
> > removing it. One of the 470 UFcaps read 1UF esr 2.6 ohms
> > Replaced with high temp 50 V equivalents and both units startup and
> > automatically lock in about 5 minutes. Changing these caps also put the
> > units back into specification for stability.
> > So there you have it the total EG&G cookbook of RBs.
> > Good luck and they do seem to be a fine unit.
> > Regards
> > Paul.
> > WB8TSL
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