[time-nuts] EG&G TS-RFS telcom RB

Bob Camp lists at rtty.us
Fri May 24 17:42:39 EDT 2013


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 era.


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 that
> 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 two
> 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.
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