[Elecraft] TCXO - 0.5PPM

[Jim Harris]

Hi,

Thank you Wayne, for your fast response.  Seems I'm better off to stick with my stock TCXO as I've never had much luck with method 1 and 2.  My K3 was in the shop 3-4 months ago and looks like Rene set it's frequency dead on.

Happy New Year. 73

Jim, W0EM


--- On Tue, 12/28/10, Wayne Burdick <n6kr at elecraft.com> wrote:

> From: Wayne Burdick <n6kr at elecraft.com>
> Subject: Re: [Elecraft] TCXO - 0.5PPM
> To: "Jim Harris" <jim.w0em at yahoo.com>
> Cc: "Elecraft Email" <elecraft at mailman.qth.net>
> Date: Tuesday, December 28, 2010, 6:24 PM
> At present, "method 3" remains
> unimplemented. Fortunately the TCXO's uncorrected drift is
> already less than +/- 0.5 PPM from 0 to 50 C. This was the
> target for "method 3".
> 
> 73,
> Wayne
> N6KR
> 
> On Dec 28, 2010, at 10:18 AM, Jim Harris wrote:
> 
> > Hi Folks,
> > 
> > Been kicking around putting the 0.5PPM TCXO in my
> K3.  After doing some reading a question or two
> arises.  The instructions sheet(s) for the TCXO
> mentions using method 1,2 or 3 in the K3 manual to set
> frequency.  The K3 manual does not have a method 3 as I
> can find.  I've checked the reflector archive and found
> there is a data input feature in the K3 utility for
> inputting data received with the TCXO.  I think this
> equals method 3.  Someone make a note to change
> instructions/manuals if needed.
> > 
> > My question is do I need to do a method 1 or 2 before
> doing the data input?  Method 1 is to use a freq
> counter.  My freq counter is only about +/- 10 Htz
> depending on variables.  Method 2 is zero beat. 
> By ear the best I can get is about +/- 25 Htz.  How
> close do I need to get with method 1 or 2 (if needed) before
> inputting the data?
> > 
> > Second question, will the 0.5PPM TCXO eliminate the
> hysteresis I see during RTTY?  Depending on whether I
> tune to a signal from low to high or high to low I can see
> 10+ Htz difference in the signals frequency.  Or, are
> other factors at work?
> > 
> > Constructive thoughts appreciated.
> > 
> > Happy New Year.  73
> > 
> > Jim, W0EM
> > 
> > 
> > 
> >
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