Well there is one exception to the idiot-proofing and that occurrs if
you use macros that have the PCxxx command in them for setting power.
Under certain conditions if a PCxxx command is used in a macro it can
overide the CONFIG:PWR SET Per bAnd setting. I have removed all PCxxx
commands from my macros until I understand this completely and have
tested each macro.
I got the following from Elecraft Support and have been testing each
macro to determine if the PCxxx command creates a problem. Nothing
replaces the Mark1 eyeball to verify,
de Dave K5MWR
Power Set/Per Band is activated at the time of a band change. If your
macro runs after the band change, the macro dominates--and vice versa.
(The last one rules, in other words). Similarly, if the amplifier
changes from STBY to OPER after the macro runs, the power will change to
the stored OPER power level.
Note that it is likely that if your macro sets a power level, that level
will become the new default power for either the K3's STBY or OPER
transmit level, depending upon which mode the K3/amplifier is at the
time the macro runs. To use even more words (hi), if the amp is in OPER
on 20m and you run a macro setting TX power to 75W, that will be the
stored power level--whether you transmit or not. The next time the K3 is
on 20m and the amplifier is switched to OPER mode, the K3 will return to
that last-used AMP = OPER mode power level of 75 W. (And the amp will
throw an overdrive fault when you transmit).
On 3/8/2020 16:06, k...@juno.com wrote:
Having followed this thread, I can heartily endorse Elecraft's method of
idiot-proofing K3 power control when used with the KPA500. I have tuned
each band for maximum output (except 200W on 30 meters per regulations).
When the amp is in standby and I key the K3, I see the output level on
the amp's display. When switching to operate, I get the prescribed
amplifier output. A momentary touch of the K3 PWR knob shows the drive
level (17 - 25 watts, band-dependent). Technology has finally found a
way to minimize blown amps during the wee hours of a contest!
73 de Ed
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