[Elecraft] Anyone using a Heathkit SB-200 with K2/100

[Lee Buller]

At 06:08 PM 3/22/2003 +0000, you wrote:
>I'm planning to use a newly acquired Heathkit SB-200 amplifier with my 
>K2/100.  Is anyone on the group doing this?  Any special tips on I should 
>go about doing this?  Thanks.
>
>Sam
>N2MXY
>K2 #1866

There is one thing that you will want to make sure you do.  Believe 
me...this is important.  The keying line from the SB200 is around 130 
volts.  I would not put 130 volts anywhere into the K2/100.  In other 
words, do not go from the amp key line on the K2 to the SB200.  Oh yes, 
there is a large transistor in there for keying an SB200....but I would not 
do it on a bet.  I would make an outboard circuit...that uses a couple of 
transistors that are swiitch from the K2's 13.8 v power supply that 
switches the 130 volt line.  Or, I would use a reed relay.  Or you could 
use a transistor and a optoisolator.  I would not put the 130 volt keying 
line to the K2...

Lee
K0WA