[Elecraft] K2/100 with LK-500Z

[Tom Hammond]

Hi Ron:

>Is there any reason to use a keying interface between these 
>two?  The K2 manual says the PA key circuit handles 1 amp at 200v 
>DC. The LK manual doens't say what the exact specs are, but from the 
>schematic it looks like the LK uses 12V for the TX relay.  I'm an 
>appliance operator so sure would appreciate advice before I key the 
>amp direct from the rig.

Nope, none whatsoever... the MOSFET at the T-R output of the KPA100 
is more than adequate to key just about any T-R line which offers a 
POSITIVE DC voltage less than about 200VDC and 5A... UNfortunately, 
it will NOT (directly) key some of the older amp T-R lines which 
offered negative voltages.

73,

Tom Hammond   N0SS