Hi guys
I have finished my K2. And I'm very pleased with it. Very nice CW rig. Its
got all those features that I didn't know I couldn't do without :o)
But there is one issue....
When I was tuning the crystal filter at L34, the manual said that it would
most likely peak at 1 to 1 and 1/2 turns down from the top. Mine has hit the
top and has not peaked. I tuned to the 7MHz birdie, and put a DMM on the
speaker plug to watch the output. The voltage was still rising when the slug
hit the top of the can.
I understand that the peak on L34 is very wide so did not concern myself and
continued the build.
Since completion I have hooked up my K2 and my old TS450 so I can switch
between them to compare receiver performance. On CW there isn't much in it.
And on SSB, the 450 has the edge. This is not what I expected after reading
heaps of glowing reports on the K2 receiver.
This has brought my focus back to the "unpeaked" crystal filter. How can I
get the tuning peak back within the range of L34??
To pre-empt questions. The K2 has no noise blanker, or additional filter/DSP
(yet). The TS450 has narrow filters, no DSP and the noise blanker is
useless. So the comparison is fair.
Can anyone advise?
Thanks
Jack VK2CJC / MM0AXL
FISTS #9666 - CW QRP Club #753 - Elecraft K2 #6404
Mid North Coast Amateur Radio Group www.mncarg.org
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