[time-nuts] Re: Efratom M-100 102 not locking

[kurt at hamcom.dk]

Hi Glen
At what temperature would you suggest ?
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: Glenn Little WB4UIV via time-nuts <time-nuts at lists.febo.com> 
Sendt: 28. november 2025 03:11
Til: time-nuts at lists.febo.com
Cc: Glenn Little WB4UIV <glennmaillist at bellsouth.net>
Emne: [time-nuts] Re: Efratom M-100 102 not locking

The output is probably from the free running oscillator.
The Physics package has a bulb with Rubidium vapor in it.
Over time the vapor will deposit on the inside of the bulb.
To rejuvenate the bulb, warm it to re-vaporize the rubidium.
This may fix your issue.

Glenn

On 11/27/2025 11:15 AM, Peter Gottlieb via time-nuts wrote:
> I have this Rb oscillator which has output but won't lock.
> 
> Are these repairable?  Worth the effort?  Date code is from 1989 so it 
> may have a lot of hours on it.
> 
> Peter
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--
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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class of the Amateur that holds the license"
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