W3FPR - Don Wilhelm wrote:
In my quick reply earlier, I failed to mention the AGC setting - even if it
is set for the manual recommendation of 3.8 volts, it may be too high and
hold the gain down. Test by turning the AGC off and on with no signals on
the band (if band noise is present, disconnect the antenna), and make
certain the DSP de-noiser is not running. If you hear a change in the noise
level, the AGC Threshold is set too high.
Imagine my surprise in discovering that later K2s have an adjustable AGC
threshold. ;-) *My* control board R1 is a 51K ohm fixed resistor ;-)
For those following the saga of K2 1641, it's pretty much completely in
operation. I need to retweak the 20m BPF a bit, but otherwise it's
rockin' out. Doing Don's AGC on/off test above might give an
almost-perceptible change in noise level, I'm not sure. Doesn't seem
like an issue.
It works better than my CW does, anyway....gotta work on that.
Now I have the battery and SSB mods to work on. We'll see how well the
battery has weathered several years storage; it may well need to be
replaced.
73 de Maggie K3XS
--
-----/___. _)Margaret Stephanie Leber CCP, SCJP/"The art of progress /
----/(, /| /| http://voicenet.com/~maggie SCWCD/ is to preserve order/
---/ / | / | _ _ _ ` _ AOPA 925383/ amid change and to /
--/ ) / |/ |_(_(_(_/_(_/__(__(/_ K3XS / preserve change amid/
-/ (_/ ' .-/ .-/ ARRL 39280 /order."-A.N.Whitehead/
/________________(_/_(_/_______AMSAT 32844_/<[EMAIL PROTECTED]>/
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