[Elecraft] KAT 500 hookup to IC 7600

[Ron D'Eau Claire]

Basically all you need to do is this:

Connect DC power to the KAT500

Connect our antenna(s) to the KAT500 (it defaults to Ant 1 and returns there
whenever you remove power)

Connect your IC7600 RF out to the KPA500 RF INPUT (probably is already ;-)

Remove the PA Key input to the KPA500 and connect it to one of the two
RCA-type PTT RLY jacks on the back of the KAT500 (and no, I have no idea why
Elecraft calls KEY in one place and PTT RLY in another ;-) As you probably
know, the center and shield in that cable must be shorted together to enable
the KPA500. Otherwise, KPA500 is inhibited. This wiring puts the KAT500 in
that circuit. A relay inside the KAT500 opens the circuit so the KPA500
cannot be enabled when the KAT500 is tuning. That prevents hot-switching
while high level RF power is applied which can damage the KAT500 and cause
the KPA500 to fault. 

That does it. 

Now, the KAT500 does have a TUNE input for those who have Icom rigs using
the AH-4 protocol. You'll need to dig into your IC7600 manual for details
about hooking that up, but it's optional. 

Note that the KAT500, like the KPA500, senses the RF drive power frequency
and changes bands accordingly. Furthermore, the KAT500 switches to the
settings for various frequency segments within each band since many antennas
are not broad-banded enough for one tuner setting to be optimum for the
entire Ham band - particularly on the lower frequency bands. This makes
resetting almost instantaneously once you have done a TUNE operation and the
KAT500 has memorized the antenna selected and the L and C values for each
frequency segment. But you *must* apply RF for the KAT500 to change to the
new band and frequency segment. Usually a single 'dit' is all you need send
and the KAT500 is instantly on frequency and ready for power. 

73, Ron AC7AC





-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of K6USN at aol.com
Sent: Thursday, November 29, 2012 12:03 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KAT 500 hookup to IC 7600

I have a new KAT 500 and wish to interface it with my KPA 500 amp and also
my IC 7600.
The manual diagrams are a bit vague (for me).  Anyone help out?
Allen
Madison, WI
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