[Elecraft] Is it possible to connect a amp to the K2 (SB-220 is OK)

[Eric Swartz - WA6HHQ, Elecraft]

That will work OK with the K2/100 keyout line. We're already back emf 
protected.

73, Eric


James Brown wrote:
> 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" 
> <eric at elecraft.com>
> To: "Todd Gahagan" <tgahagan at imt.net>
> Cc: <elecraft at mailman.qth.net>; "n2uz" <n2uz at comcast.net>
> 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.
>>
>>
>> Help: http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>>
> 
> 
>