Eric:
My SB-220 uses +123VDC through a 5Kohm relay coil keyed to ground. There is
no diode protection from back-emf across the relay coil, but there is a
.02mfd cap on the low side of the relay coil to ground.
Regards,
Jim Brown, K5JAZ
----- Original Message -----
From: "Eric Swartz - WA6HHQ, Elecraft" <[EMAIL PROTECTED]>
To: "Todd Gahagan" <[EMAIL PROTECTED]>
Cc: <elecraft@mailman.qth.net>; "n2uz" <[EMAIL PROTECTED]>
Sent: Wednesday, January 05, 2005 4:43 PM
Subject: Re: [Elecraft] Is it possible to connect a amp to the K2
The K2/100 already includes a high voltage output keying line for linear
amplifiers on its KPA100 back panel. It can handle up to 200V and 1A max.
Most amps with -positive- keying voltages can be T/R keyed from the
K2/100.
I think the SB-220 uses a positive voltage so it should work.
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