I ordered my K3S with the optional KTCX03-1-F which the description
shows "1 ppm f/w correction to 0.5 ppm, factory installed".
In 3+ years of use, I check the calibration on a monthly basis. I find
it to be always better than +/- 1 Hz at 10 MHz. I have adjusted the
Ref Osc as needed. I fin
Elecraft specs from my 2010 K3:
TCXO01 = +/- 5ppm for 0 to 50c
TCXO03 = +/- 1ppm
But I recall Wayne stating the TCXO03 actually does close to 0.5 ppm
At 28-MHz 5ppm = 140 Hz, 1ppm = 28 Hz, 0.5ppm = 14 Hz
I installed the EXREF on my K3 with an external OCXO 10-MHz standard.
At 28-MHz I measure
More good info!! I went ahead and ordered the KTCX03-1 and the 2m transverter
reference lock upgrade.
From: Mike Harris via Elecraft
Sent: Sunday, May 19, 2019 5:41 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KTCX03-1 high stability reference oscillator
Yes, a 10MHz GPS locked
Yes, a 10MHz GPS locked reference source. Or wait for about an hour from
cold for the TXCO to stabilise. Calibration might be off, east to
correct, but it will not be moving much.
Regards,
Mike VP8NO
On 19/05/2019 18:02, HB wrote:
Thanks Jim….Good feedback.
Any other worthwhile mods to ac
Thanks Jim….Good feedback.
Any other worthwhile mods to achieve stability?
Hank
K4HYJ
From: Jim - N4ST
Sent: Sunday, May 19, 2019 4:49 PM
To: h...@optilink.us; elecraft@mailman.qth.net
Subject: RE: [Elecraft] KTCX03-1 high stability reference oscillator
Hank,
From time to time I do meteor
Hank,
>From time to time I do meteor scatter on 6M and being 200 Hz off with
MSK-144 means you won't decode.
While the standard oscillator should keep me within bounds when properly
calibrated, I experienced problems.
Installing a new KTCX03 cured my stability issues.
This wouldn't be a problem on
Hank,
The real world difference is that you will see less change with
temperature changes with the high stability TCXO.
The phase noise improvement is provided with the new synthesizers and
not with the TCXO.
73,
Don W3FPR
On 5/19/2019 1:35 PM, h...@optilink.us wrote:
Hey Folks.
In real
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