K1 zero beating

[Hank/KEoCU]

K1 question. Is the passband (or center) frequency of the xtal filter automatically the same as the sidetone pitch? If it is, than zerobeating a station at any selected sidetone pitch should automatically center the cw note in the filter (?). If not, what do you do? I guess I'm a little unsure how to make sure I transmit and receive on the correct frequency with respect to the narrow xtal filter passband. Please enlighten me! Thank you.

[WA5VFA]

I'm wondering if there is a suitable replacement for the 2SC1969 output
transistor used in the K-1. This device is now obsolete and not readily
obtainable. It would be nice to have a device that would readily replace it
that is current and perhaps has a bit more gain and dissipation.

What have you tried that has worked?

Ron WA5VFA

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[Don Wilhelm-4]

Hank,

It is 'automatic' *after* you set up the K1 correctly.

Follow the instructions on the manual - first align the BFO so the
center of the FL3 passband is at your preferred CW pitch.  Then move the
switch on the bottom of the RF Board and adjust the transmit offset
equal to the same pitch.

After that is done, tune your desired signal to your preferred CW pitch
tone, then the transmit signal will be correct (and the dial will read
the transmitted carrier frequency).

73,
Don W3FPR

Hank/KEoCU wrote:
> K1 question. Is the passband (or center) frequency of the xtal filter
> automatically the same as the sidetone pitch? If it is, than zerobeating a
> station at any selected sidetone pitch should automatically center the cw
> note in the filter (?). If not, what do you do? I guess I'm a little unsure
> how to make sure I transmit and receive on the correct frequency with
> respect to the narrow xtal filter passband. Please enlighten me! Thank you.
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