[time-nuts] GR 1115B
lists at rtty.us
Sun Aug 1 12:29:19 UTC 2010
It's an early Warner resonator so stress is an issue. It is drifting in the right direction. I am also worried that the tuning coil may be tough to replace. I've seen them get pretty fragile after baking for years and years. Wait and see sounds like a good plan.
On Jul 31, 2010, at 11:11 PM, "Max Robinson" <max at maxsmusicplace.com> wrote:
> 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
>> 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.
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