[Elecraft] switchbox KX3 to signalink/mike+headphones

[herr42 at comcast.net]

I respect that this could be whipped up.

But

I wanted to take advantage of the user community to see if there were slick
products out there.



-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of Ed Cole
Sent: Sunday, July 24, 2022 1:21 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] switchbox KX3 to signalink/mike+headphones

I made something similar:  I wanted to breakout the mic PTT line from my
IC9700 to control a sequencer (which was already wired to control preamps,
TR relays and amplifier PTT's).

I found 8-pin connectors on Amazon that would mate to the IC9700 mic jack,
used RG-174 for shielded cable for the mic audio jumper inside a small
aluminum box and used cat-5e for mic cable jumper from radio to switch box
and added a clamp-on ferrite bead at the radio end (for ac hum/noise
rejection).

I used 4-pin mic connectors to route the PTT to/from the sequencer (and
using more cat-5e for that jumper).  I added a toggle switch to defeat radio
PTT if I was running my K3 with the sequencer to avoid accidental keying of
the IC9700 by the sequencer.
http://www.kl7uw.com/IC9700_Hints&Measurements.htm

For interfacing KX3 mic/signal link, you will need a four conductor mini
phone jack to mate into the radio.  They can be found with a little
searching.

I made a computer interface for my KX3 using a West Mountain Rigblaster
Nohmic:
http://www.kl7uw.com/KX3_Computer_Interface.htm

These are NOT hard to do projects.  No surface-mount soldering of computer
components, involved,

73, Ed - KL7UW
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