[time-nuts] Lady Heather numbers

Bob Camp lists at rtty.us
Tue Feb 26 02:21:56 UTC 2013


Hi

The unit should not be overly sensitive to temperature. I'd guess that your improvised oven isn't holding temperature very well. The original likely held things to within < 0.1 C at some target in the 85 to 110C range.

Bob

On Feb 25, 2013, at 7:39 PM, Garren Davis <garren.davis at qlogic.com> wrote:

> 
> The antenna has a pretty clear view of the sky. I notice that whenever a satellite drops out
> it causes the oscillator white trace and the DAC green trace to jump around. I wonder why that
> happens when there are 6 other good satellites.
> 
> I can go back in time by using the down arrow and I see that it was pretty steady overnight
> until the furnace turned on to heat up the house. It's amazing how sensitive it is.
> 
> Garren
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of J. L. Trantham
> Sent: Monday, February 25, 2013 4:28 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Lady Heather numbers
> 
> OK.  Found the problem.  Google Earth defaults to 'East' not 'West'.  Forgot to tell it North/South, East/West.
> 
> Looks like your antenna is near the apex of your roof.
> 
> The 17 minute span of the picture limits the ability to make a 'long term'
> assessment.  However, looks reasonable compared to mine in NW Florida except the temps seem a bit higher.
> 
> Joe
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Garren Davis
> Sent: Monday, February 25, 2013 5:50 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Lady Heather numbers
> 
> 
> 33 north, 117 west. I am in southern California.
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of J. L. Trantham
> Sent: Monday, February 25, 2013 3:44 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Lady Heather numbers
> 
> If I am not mistaken (and I could be), the Lat/Long suggests that you are in China.  Is that correct?
> 
> Joe
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Garren Davis
> Sent: Monday, February 25, 2013 11:00 AM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Lady Heather numbers
> 
> 
> Hi,
> 
> I have been playing with my thunderbolt and Lady Heather over the weekend. I hope it's ok that I attached a screen dump of what I have. Can anyone comment on the picture. It's been running less than a day and I don't know if what I have would be considered good as far as accuracy and stability is concerned.
> 
> Thanks.
> 
> Garren
> 
> 
> 
> 
> 
> 
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