[Elecraft] switching a heath amp

[Dave Hachadorian]

I used the K3 to switch my SB-220 backup amp (+130 VDC) a couple 
months ago.  It worked fine through an entire contest.  The K3 
spec is +200 VDC at 5 amps. I did put a reverse diode across the 
relay line to prevent the possibility of negative inductive 
kickback.  Actually, I put the diode right at the K3 via an RCA 
wye with the diode soldered across one leg of the wye.  It was an 
emergency deal, but it worked fb.

Dave Hachadorian, K6LL
Yuma, Arizona


-----Original Message----- 
From: riese-k3djc at juno.com
Sent: Thursday, March 15, 2012 10:12 AM
To: Elecraft at mailman.qth.net
Subject: [Elecraft] switching a heath amp

Gang

the heath series of amps use bial voltage to switch the thing 
from T/R
and That amounts to 130 +- volts
would the K3 be Ok switching this or should I look to add an 
additional
relay
and switch that

Bob K3DJC
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