Hi,
I know this is an "Oldie" on the Reflector, but possibly worth
bringing up again for the builders that have arrived since it was last aired.
A while ago, I built K2# 5577 and it was my "second set" until I sold off
my old K2 #2204 to a keen chap here. It didn't take me long to realize I
had made a less than perfect job of setting the 4 MHZ Master Oscillator
when I joined in a net and found my readout didn't match the net frequency.
In the past, amongst other methods I had used to set the 4MHZ oscillator,
was the one put out by Wayne N6KR, and I hadn't had much success with it,
but decided that if anyone should know how to set the oscillator it should
be the designer, so I gave it another try.
Without going into great detail, the method involves adjusting C22 (after
tuning in a SSB signal "perfectly"), until the frequency readings at TP1
and TP2 are the same.
My first problem was tuning a SSB signal in "perfectly", but it was fairly
easily got around by listening to WWV and altering the dial on the K2 until
there was no difference in the audio while switching between USB and LSB.
Switching to CW mode and using "SPOT" seemed to confirm I had the setting
right.
From there I followed Wayne's instructions and soon found where I had been
going wrong in the past....I hadn't been following steps 6 & 7 in the
instructions, and that made all the difference. I was able to get the
frequency around 20hz off, which is far better than the 220hz discrepancy I
started with.
Where are the instructions to use Wayne's method??... On the Elecraft site
go to "Builder's Resources" and then select " Frequency Calibrating the
K2's 4Mhz Master Oscillator".
Appologies to all those who find this "old hat", but I am sure there will
be a few look-ups amongst the newer Elecraft fraternity...
73.......Ron ZL1TW
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