Andy GM0NWI wrote:
Question 1 ... "...Does the constructor ...have to do the
"linerization" step that is carried out for 40M "only" (or so the manual
states at that stage) ...for the rest of the bands installed..? "
The CAL PLL is ONLY done on 40 meters. It won't run on other bands, anyway!
As for the "BFO and FILTER" Alignment, in the steps of the manual
afterwards... I followed the instructions, pressing the relevent buttons
when asked... and all that I did "really" there, was just make sure that
the "digital frequency display" ...showed exactly what was in the manual
at that stage...I did that for ALL the bands, ..adjusting "only" the VFO
knob...to make sure my display read for each "BFO" and "FILTER" reading
"per" band...what was in the manual...
This procedure gets you close to optimum settings. However, you can improve the
filter performance by using the Spectrogram procedure, which requires a computer
with sound card and some form of the spectrogram program. See
<http://www.n0ss.net/index.html#Spectrogram>
SO..proceeded to do what the manual asked... and "peak" for MAXIMUM
SIGNAL...and MINIMUM NOISE...on 40M ONLY... which I "seemed" to have
achieved... At this point I have to point out that I was NOT hearing
any "stations" on 40m while or during this aligment.... only the "test
tone"....
This is correct, and the adjustment is not critical.
Near the end of Page 61... the manual asks the constructor to "peak" or
"turn".....L1 and L2 for "peak signal strength"... and use the K2's
S-meter for this purpose to see when things are at their maximum peak...
Question 3... In this step I have to report that I DID NOT..see "much"
of a "signal peak" here at all... and also...that during ALL of the
above "story" ... I WAS NOT..hearing ANY "stations" AT ALL on
40m......"only" noise...and the generated "test tone"...
You should get a noticeable peak. Also the noise should increase significantly
when you connect an antenna to the K2 and decrease when you disconnect it. If
this doesn't happen, there might be a problem with the bandpass or lowpass
filters. The small capacitor (C8) between L1 and L2 is very easy to damage if
you have twisted the leads.
My "thoughts" were that I "should" be hearing stations on 40m by now...
atleast..?? Perhaps not...
Yes, you should.
One last thing to mention...is that back in the manual... Just before
putting the componants on the "RF Board" near the back left hand side of
the board... I WAS getting my digital display to light up... After
doing that part of the manual...and continuing to my present position...
carrying on with the alignment section.. I can now report that for some
"reason" I don't seem to be getting a "light" on the digital display
anymore...
The LCD backlight can be turned off in the menu by setting the LCD to DAY
instead of NITE. Perhaps you accidentally did this?
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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