[Yaesu] RE: SB-220 Connections

[Robert Norgard]

You should check with Harbach electronics, I believe they make an
inexpensive low voltage keying kit fot the SB-220.

73,

Bob - KL7FM




---Scott Ellington <sdelling@facstaff.wisc.edu> wrote:
>
> Caution:  The SB-220 control relay can cause serious damage to a
transceiver.  It
> has a 110 Volt DC coil, and NO catch diode.  Even if the transceiver
uses a 
> relay to control the amplifier, it can be damaged.
> 
> The catch diode can be added, which MAY make it safe to switch with
the 
> relay in the transceiver.  A safer approach is to use a buffer relay
with
> a low voltage coil and a catch diode.  The catch diode should still
be added
> to the SB-220 to protect the buffer relay contacts. 
> 
> 
> -- 
> 73,
> 
> Scott  K9MA
> sdelling@facstaff.wisc.edu
> 
> --
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