Rather than try to listen for zero beat I offset the dial reading by 1kHz and
use a computer sound card program to measure the frequency of the audio
tone. Fldigi is a good program to use for this.
-
Julian, G4ILO. K2 #392 K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.
Hello again again,
Here are links to 4 recordings made for method 2 with wwv at 10MHz with a
tuning error of 0, 3, 10 and 20Hz (approximately). The sidetone and center
frequency is 800Hz and the CW BW is 1100Hz.
http://ab2tc.getmyip.com:8000/pictures/wwv_error_0.mp3
http://ab2tc.getmyip.com:8000
Hello again,
While I don't disagree with other people's suggestions that visual aids
would be of assistance I am still a little bit at a loss (no pun intended)
why your hearing loss should be a serious obstacle to detecting the zero
beat on the side tone. Do you have any problem hearing your chos
On Dec 29, 2010, at 12/2910:12 AM, radioshoppe wrote:
> As mentioned in my email about the best I can do with Method 2 is
> about +/20 hz.
Do you have an RTTY program that has a crossed-ellipse display
(affectionately called "crossed bananas" by RTTY nuts)? If so, that
might get you cl
Jim,
Since you say you have hearing loss, that can prove difficult - I would
suggest a "visual aid".
You might try using Spectrogram (or another FFT audio spectrum analyzer)
when attempting Method 2.
You should see the spike from the sidetone and the spike from the WWV
carrier on the display
Knut,
Thank you for your suggestion. As mentioned in my email about the best I
can do with Method 2 is about +/20 hz. I've tried it numerous times. When
adjusting the frequency I hear a dead spot 25-40+ hz wide that has no
womp-womp-womp. I take half of the width and set the frequency there.
12/28/10, Wayne Burdick wrote:
> From: Wayne Burdick
> Subject: Re: [Elecraft] TCXO - 0.5PPM
> To: "Jim Harris"
> Cc: "Elecraft Email"
> Date: Tuesday, December 28, 2010, 6:24 PM
> At present, "method 3" remains
> unimplemented. Fortunately the TCX
Hi,
Using method 2 you should easily be able to get it within a couple of Hz by
beating it against the CW spotting tone. The instructions in the manual are
quite detailed (make sure you scroll over to the bulleted list). The
wow-wow-wow warble you hear near zero beat is very easy to recognize
pro
This is not specified, but to be safe, I'll say "after." However, I've
observed very little additional drift during warmup. This is a TCXO,
not an ovenized oscillator, so it would tend to correct for all
temperature changes whether due to internally generated heat or
ambient changes.
73,
W
Wayne, is the TCXO drift spec for the period after warmup, or does it include
the warmup period?
Steve N9SZ
>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,
>Wa
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 TC
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
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