Eric, SM0RVV wrote:
"...the basic K2 is up and
running! (Yes, I'm pretty proud of myself ;-)
I tried to use my external manual tuner with it.
But that was really difficult!
As soon as I rotated a tuning-knob the K2 adjusted it's power. I found it
impossible to tune the antenna.... :-(
Is this the way it should be, or am I missing something?
Is my tuner useless with K2 or is there a workaround to the
autopower-level "problem"
----------------------------------
Your K2 is simply responding to the varying impedance it is seeing at the
antenna terminal, Eric.
Use the K2's TUNE mode to tune up. That disconnects the power control
circuitry. Set the K2's output power for the lowest value that produces a
useful reading on your SWR meter. Your output power will still appear to
vary because of the changing load. Ignore that and adjust your ATU for a low
SWR between the tuner and the K2 as indicated on the ATU meter. The lower
the SWR, the lower the apparent power variation.
Once you have the SWR below, say 1.5:1, exit TUNE, set your POWER control as
desired and you're ready to transmit.
The K2 uses a simple RF voltmeter to sense the power. It converts the
voltage it senses at the antenna connector to power assuming it has a
perfectly non-reactive 50-ohm load at the antenna. So the lower the SWR, the
more accurate your POWER indication will be.
Ron AC7AC
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