Posted by
Edward R Cole on
Apr 21, 2011; 9:52pm
URL: http://elecraft.85.s1.nabble.com/XG3-Arrived-tp6292867p6295676.html
I bought a 9volt battery for the XG3, today. Running at 0 dBm on
14.020 it puts out a nice clear CW note reading about S7-8 with the
XG3 sitting about a foot from the K3. I have a 2m rubber duckie as
antenna on the XG3 and the triband beam 50-feet above the shack on
the K3. I lowered output to -33 dBm and still have a CW note though
now about S1 and hearing a little ac noise coming thru the K3.
I switched to 28.020 and clean signal at either 0 dBm or -33 dBm;
switched to 144.220 and good signal there, also. So I guess I hear
some ac on 20m. It has nothing to do with the XG3 - End of subject!
BTW the signal is just as stable and on frequency at 2m as on 20m. I
have had other xtal signal sources that drifted many KHz constantly
for the first 30-min to an hour of use. I hear NO
drift! wow! There was a little freq. offset at 28.020 but I can
always do the calibration if I really care.
Frequency accuracy is fine as it is. Note this is with the K3
equipped with the K3EXREF so it is within 2-Hz accuracy. Out of
interest I connected the XG3 to my EIP-538 freq. counter and it shows
1.819.997 MHz +/- 2 Hz; 20.020.014 +/- 5 Hz; 144.220.250 +/- 20
Hz. This counter has an internal TCXO that shows no error with my
Rubidium standard.
I bought it for receiver sensitivity measurements and filter tuning,
and the stability is more than adequate for that.
I haven't played with the XG3 utility but now that my CoilCraft
7-pole LP filters and filter boards from Clifton Labs have arrived I
will try making some response curves, scanning with the XG3. I am
making up four LP filters for use on the workbench (and with the XG3
when I want to eliminate harmonics). The filters were free
engineering samples.
I will show the results on my website.
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep
[hidden email]
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