[Elecraft] K3 band data query

[Ken K6MR]

This is easy to do with an Arduino if you are capable with those kind of things.  The serial port on the Arduino can read the data from the K3, and set/clear a relay at any frequency you want.  Some assembly required.  :^)

Ken K6MR

From: Dennis Ashworth<mailto:dennisashworth49 at gmail.com>
Sent: Sunday, October 18, 2020 11:30
To: Elecraft at mailman.qth.net<mailto:Elecraft at mailman.qth.net>
Subject: [Elecraft] K3 band data query

I operate a vertical antenna for 80 & 160M where the bandwidth is such that I need to switch in reactance between the phone and CW portions of each band. I currently do this manually, but am installing vacuum relays for switching remotely. Is there a way the K3, through the data port or whatever, can send a signal when migrating between traditional (or operator defined) phone and CW portions of the band?

Antenna matched points on 160 are at 1825 and 1855; 80M are 3520 and 3800.

I had considered sensing the K3 mode, but that’s not an acceptable solution. The 160M CW contests can often extend into the traditional phone area and FT8/WSPR often use USB mode in the CW portion.

Thoughts?

Dennis, K7FL
Las Vegas, NV
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