[time-nuts] GR 1115B

Max Robinson max at maxsmusicplace.com
Sun Aug 1 03:11:38 UTC 2010

First I suggest you let it run for a couple of weeks to see if it will come 
into range.  It can take time for moisture to be driven out and stresses to 
be relieved.

If you have to go into it, it comes apart very easily.  Just be very careful 
not to break the flask.  You probably couldn't get a replacement.


Max.  K 4 O D S.

Email: max at maxsmusicplace.com

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----- Original Message ----- 
From: "Bob Camp" <lists at rtty.us>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Saturday, July 31, 2010 11:54 AM
Subject: [time-nuts] GR 1115B

> Hi
> The 1115B got here yesterday. It seems to work pretty well. Not to 
> surprisingly it's drifted a bit over the last 35 years. It's right at one 
> end of it's 2.7x10^-7 tune range.
> From what I can see in the manual there's an adjustment on the crystal 
> board that might bring it back onto frequency. Since getting there 
> involves disassembling the dewar flask / oven combination I'm a little 
> hesitant to dive right in. Has anybody torn into one of these before? If 
> so what am I likely to run into? Everything I can see is wide open and 
> very easy to work on. I'm hoping the oven is built the same way.
> Thanks!
> Bob
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