18
Tap
B AN D
quickly one or more times until the
10-MHz
band is selected.
Set the VFO to about mid-band. Tap
B AN D
once if necessary to verify that you're in the right 100-
kHz band segment.
Note:
Your VFO dial could be off by as much as +/- 10 kHz at this point. Operating
frequency calibration will be completed after filter alignment.
If you're using a signal generator or ham-band transmitter to generate a signal, turn it on (or key it) and
tune the K1 VFO until you find the signal. Adjust the generator's output (or the position of the short wire
connected to the K1) so that a fairly weak signal is heard at the K1's audio output. A signal that is too
strong may overload the K1's receiver, making it hard to find the best setting for the trimmers.
If you're using an antenna, try to locate an on-air signal within the present band. If no signals can be
heard, you may be able to peak the filters using band noise.
i
All of the premix filter trimmers are numbered (C1-C8), while the RF filter trimmers use letters as
reference designators (CA-CH). This serves as a reminder of which filter is to be adjusted.
Adjust C5 and C6 in the premix filter alternately, listening closely for any increase in signal strength.
Tune the trimmers slowly. If you don't hear any change, leave C5 and C6 at their mid-points.
Adjust CE and CF in the RF filter alternately. Tune slowly and listen for increased signal strength. If
you don't hear any change, move C5 and C6 to slightly different settings, then peak CE and CF again.
Continue to peak all four trimmers for this band until no further improvement is noted. You may find
it necessary to reduce the signal injection level as you get close to the optimal settings.
i
If you are unable to peak the received signal, refer to Troubleshooting (in this manual).
Switch to the
7 MHz
band and set the VFO to mid-band. Set up the signal source for this band.
Adjust C7 and C8 (premix), then CG and CH (RF) to peak the signal on this band. (See Figure 11.)
Switch to the
18 or 21 MHz
band and set the VFO to mid-band. Set up the signal source.
Adjust C1 and C2 (premix), then CA and CB (RF) to peak the signal. (See Figure 11.)
Switch to the
14 MHz
band and set the VFO to mid-band. Set up the signal source.
Adjust C3 and C4 (premix), then CC and CD (RF) to peak the signal. (See Figure 11.)
If your K1 is not yet completed, turn to page 40 in the K1 owner's manual now, and continue with
Coarse BFO Alignment
, etc. You'll return to this manual later to do transmitter alignment.
Operating Frequency Calibration
Calibrate the VFO dial on all four bands using the method described on page 41 of the owner's manual
(left column).
