[Amps] RE: Problems with Heath SB-220

Pete Smith n4zr at contesting.com
Wed Jan 22 17:24:37 EST 2003


At 02:06 PM 1/22/03 -0800, Dan wrote:
>If the relay is stuck shut, you may
>be able to find a +12v on xmit signal somewhere on the back of the 930 to
>operated the power xstr


This is good advice -- there is such a signal and it leads the production 
of RF by a few milliseconds -- I forget the exact figure but K9MA told me 
about it.  I use +12V to switch an FET that switches the vacuum relay QSK 
in my modified SB-220 -- and so far so good.

73, Pete N4ZR
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