[time-nuts] R&S XSRM Rubidium

Magnus Danielson magnus at rubidium.dyndns.org
Sat Jan 22 18:22:26 UTC 2011

On 01/22/2011 07:03 PM, paul swed wrote:
> Interesting
> Took the oscillator board apart last night and found C11 has a cold solder
> joint.

That explains it.

> Its the variable cap that tunes the heater. Have not re-soldered it
> yet as I am having trouble getting enough heat in the area even with a
> soldering gun to tack the cap back on to the housing.
> Fortunately I have an even larger gun I will try today.
> This would indeed explain whi I had variable startups I hope. Especially
> when tuning the cap. For anyone of interest its 2-20pf johannson type. The
> manual says 1.5-15.  Close enough.
> Will update later on if I solve the oscillator problem.

Good luck!

I hooked on to the RF-feed and trimmed it for best response.


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