[time-nuts] Rubidium freq standard - temperature
paulswedb at gmail.com
Thu Nov 30 20:24:42 EST 2017
I have some dribs and drabs of details on the units I have. Happy to send
whatever I have to you directly. Suspect its to large for FEBO. What I can
tell is they must have been considered quite good and for military use. I
haven't run mine alot because I was concerned about the temp like you. Nor
have I really dug in. They just worked from day one.
Granted maybe better if I look at the caps. The good thing about the unit
is the connector is clearly labeled with the pin functions. So I was able
to operate them right out of the hamfest. As I recall these were very very
On Thu, Nov 30, 2017 at 8:04 PM, Jerry Hancock <jerry at hanler.com> wrote:
> Paul, The units Gilbert gave me were TS-RFS. They are fairly large. The
> physics end is about 5”x2”x2" and overall length about 9”. They lock
> pretty quickly now that I’ve replace the caps. They can drive 50ohms
> pretty hard, outputting a square wave. I’m thinking of bolting on some
> fins to the physics end. Just two points: 1) it would be nice to dial them
> in closer; and 2) I wish I had equipment to test them more accurately. I’m
> working on building one of the Tight PLL test sets to solve #2. Gilbert
> suggested we look to see if we could tap into the field current somehow to
> set the frequency more accurately.
> > On Nov 30, 2017, at 3:44 PM, paul swed <paulswedb at gmail.com> wrote:
> > Jerry
> > You have some EG&G RBs. Thats great news. Now I am not alone. I have 2
> > that work. I have found little details on them.
> > That said I believe they are intended to be mounted on a heat sink. One
> > surely looks like that whats would be done.
> > I believe mine are LCR-10-T. Might have to double check that.
> > Regards
> > Paul
> > WB8TSL
> > On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock <jerry at hanler.com> wrote:
> >> I was able to get all 5 of these EG&G Rubidium Frequency Standards
> >> by replacing the caps as another member found. They have a large
> >> on them, no fins, and are running at 43C. Is that too hot? Should I
> >> them down to a larger heatsink? They consume a little over 9w after
> >> lock, about double that while warming up.
> >> The only other issue I see is that the 8bit frequency setting doesn’t
> >> allow me to set the frequency closer than 5E-11. I don’t know if this
> >> good for these units and RFS in general or not.
> >> Thanks.
> >> Jerry
> >> [/begin buttkissing]
> >> PS: I have learned quite a bit from this group in the past couple of
> >> months. John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a lot
> >> help and have added a lot of enjoyment to my hobby.
> >> [/end buttkissing]
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