Close but no.
With the amp in standby, the power out up to 100 W is determined by the
power setting (knob) on the K3.
With the amp in operate, the (reduced drive) power is determined by the
power setting on the K3; best if the 'Set by band' feature is used (the
amount of drive for the desired output varies according to the band in use).
You use the _same_ knob for operate/standby, it remembers. It can't be
simpler.
Rick NHC
On 9/2/2019 7:45 AM, Bob McGraw K4TAX wrote:
Andy et al:
With the station configured as shown in the KAT500 manual, page 5
Figure 1, when operating a digital mode or any mode for that matter,
and the amp is in STBY the K3S is delivering the power as set by the
PWR control. Normally 100 watts. When the KPA500 is then switched
to OPER the PWR on the K3S is set to the value as defined in the PWR
SET menu. Typically 20 watts drives the KPA500 to 400 to 500 watts
output. Thus there are 2 sets of per band power settings, one for
barefoot operation and one for use with the amp.
As to how well it works, I'd say 100% as I have observed no
mis-operation or fault indication in the 2 years of using the station
on a daily basis.
73
Bob, K4TAX
On 9/2/2019 8:58 AM, Andy Durbin wrote:
"With my K3S, when I switch the KPA500 to Operate, the transceiver is
automatically reduced to the correct power to drive the amp."
Bob,
I'm curious to know how well that feature works. Let's say your
KPA500 is STBY, your K3 is set to 100 W out, and you are transmitting
in a digital mode. What happens when you switch the KPA500 to OPER?
If you don't know the answer please don't it!
My controller ensures that the KAT500 key line is inhibited when the
KPA500 is in STBY. When the KPA500 goes to OPER I set appropriate
exciter power, and only when correct power has been verified do I
enable the key line. If I'm transmitting at 100W with KPA500 in STBY
then selecting OPER gives a brief power reduction before establishing
high power output.
73,
Andy k3wyc
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