[Elecraft] Re: SB-221 for K3 need some help.

[Dave G4AON]

Don, there isn't a diode across the relay coil in an SB220 - so there 
may be a nasty back emf voltage on key release. Also, the K3 maximum 
keying delay is 20 mS, will the relay in a SB220 switch in that time?

I don't want to dampen your enthusiasm, but old linears were designed 
for relay contact switching and generally were slow on change over... 
They can be modified, but in standard format may not work too well.

73 Dave, G4AON
K3/100 #80, Acom 1000
--------------------------------

I found out this week that K3 is good with Heathkit
SB-220 amps, all you need to do is connect a shielded
RCA cable between the units - how easy is that? !!!