[Elecraft] KPA500 Issue

[Ken K6MR]

"However, if the rigs are on different bands, you do need to rely on frequency sensing by the amp."

You don't have to do this, but it does take a bit of extra hardware/software to interface two K3s to a KPA1500.  In addition to the necessary relays to switch the RF path you can use an Arduino to manage the band data as well as the Aux Bus messages.  I also use a MicroHam MK2R+ to point the amp at the correct radio.  It is seamless.  I have the amp in a closet and never touch it, monitored only by the remote software.  I can switch instantly between radios in a SO2R setup and interleave QSOs.

Ken K6MR


________________________________
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on behalf of Frank Scolaro <fscolaro at mindspring.com>
Sent: Friday, April 1, 2022 8:46 AM
To: James Bennett <w6jhb at mac.com>; Elecraft Reflector Reflector <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] KPA500 Issue

Jim,.

I use the "1A2R" (one amp tw0 radios) from 4O4A.  I have two rigs share my KPA1500.  However, if the rigs are on different bands, you do need to rely on frequency sensing by the amp.  Not sure if the KPA500 does that.

GL
Frank, W2YK

-----Original Message-----
From: James Bennett
Sent: Apr 1, 2022 11:02 AM
To: Elecraft Reflector Reflector
Subject: Re: [Elecraft] KPA500 Issue

Well, it looks like there is no simple solution to this dilemma. I was hoping to (easily) be able to use the amp with either rig while both were here in the shack. Pulling the audio cable when I want to use the IC-705 with the amp isn’t practical due to the location of the radio. I changed the “Radio” setting from K3 to Analog and Serial, but with the cables attached, the result is the same - as soon as the amp is put in OPER mode it goes into transmit state (* showing on the LCD).

So, the only option for the time being is to always have the K3 powered up and on the band that I want to operate the IC-705 on. Just need to keep their frequencies separated as much as I can. Unless Jack comes up with an alternate…! :-) :-)

Jim / K7TXA
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