[Elecraft] Is it possible to connect a amp to the K2

[Todd Gahagan]

Thanks very much Eric.  I've been off the reflector for a couple of days.  I 
believe the keying voltage of the 220 is around 120V DC+.      I'll give it 
a shot.

Todd, WA7U


----- Original Message ----- 
From: "Eric Swartz - WA6HHQ, Elecraft" <eric at elecraft.com>
To: "Todd Gahagan" <tgahagan at imt.net>
Cc: "n2uz" <n2uz at comcast.net>; <elecraft at mailman.qth.net>; "Tom Hammond" 
<n0ss at earthlink.net>
Sent: Wednesday, January 05, 2005 3:43 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.
>
> The few amps with negative keying voltages will need a relay or solid 
> state buffer between the amp and the rig.
>
> See page 59 of the KPA100 manual for the key out line specification, and 
> page 53 for the 8R Hold menu option that provides a keyout hold feature to 
> prevent amplifier relay chatter on CW.
>
> 73, Eric  WA6HHQ
> Elecraft
>
> Todd Gahagan wrote:
>> I would really be interested in this also Tom.  Been going to  drive my 
>> SB220 with the KPA-100, K-2 combo for some time.
>