How about using an external switch to select which ATU settings the amp
uses? Perhaps with a digital INPUT line?
Scott K9MA
On 1/26/2018 11:15, Wayne Burdick wrote:
This is definitely doable from the amp. All it takes is an external antenna
switch with a control port compatible with RS232, Ethernet, USB, or one of the
amp’s multi-purpose digital output lines. (These have other uses, too, such as
SWR alarm output.)
To select among antennas from the amp, you could do any of the following:
- tap the ANT switch to go between two or more antennas in rotation
- tap ANT then use the UP/DN switches
- assign two frequently-used antennas to the front-panel PF1 and PF2 switches
In all cases, the LCD would show your selection from among N external antenna
jacks.
We can adapt the firmware to handle any such scenario.
Wayne
N6KR
On Jan 25, 2018, at 7:58 PM, K9MA <[email protected]> wrote:
I'm concerned about the same issue: Multiple antennas on one band. I have an
automated antenna selection system. In addition to following the band data
from the transceiver, there are switches to select antennas. I frequently have
to very quickly switch antennas, so it must involve only a single switch.
Using a mouse with the computer is nowhere near fast enough and I really don't
want to make it dependent on the computer, anyhway. However, my antennas have
different impedances, so require different ATU settings. So, how can I tie the
KPA1500 ATU into my antenna control switch so it automatically switches
settings? All the antenna switching is external to the amp, so only a single
amp output is used. The ideal would be a control line to the amp, controlled
by the same switch that selects antennas, which would select ATU settings. I
really don't want to make it dependent on the computer. I expect others have
the same issue. Can the KPA1500 be made to do something like this?
73,
Scott K9MA
--
Scott K9MA
[email protected]
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Scott K9MA
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