[Elecraft] Frequency Problem?

[Wallace, Andy]

> -----Original Message-----
> From: Thor, N9IK [mailto:n9ik@thorlind.com]
>=20
> I=20
> zero beat the=20
> K1's signal on the kenwood, then transmitted from the=20
> Kenwood.  The signal=20
> received on the K1 was, again, about 100Hz low.
>=20
> What is out of adjustment on the K1?

BFO alignment and transmit offset.=20

In the K1 manual rev E (which applies to your serial),
see page 40 for "Coarse BFO alignment." This has
you tune in a signal to the strongest (peak) level,
which basically centers the signal in the crystal filter.
Then, using the sidetone pitch you prefer, you set the
BFO such that when this signal is still centered in
the passband, the pitch matches the BFO.=20
--> THIS MEANS YOU'LL ZERO BEAT THE RECEIVED STATION AT
YOUR SIDETONE PITCH.

See page 47 for "Transmit offset alignment." This
has you jumper two pads on the RF board and then
transmit, and adjust the transmit tone and the sidetone
to match.=20
--> THIS MEANS YOUR TRANSMIT SIGNAL WILL BE OFFSET TO
YOUR SIDETONE PITCH, AND BE ZERO-BEAT WITH THE RECEIVED
STATION.

Those two should do it!

I believe there's a chance you can be on the "wrong side" of
zerobeat with these procedures. You've got the BFO correct
if you're receiving in "lower sideband" - in other words,=20
the pitch of the received signal goes up as you move the=20
VFO knob clockwise.=20

Andy

PS the same procedure is in the rev F manual on the Elecraft
website but instead of jumpering pads they've put a switch
on the main board.