[1000mp] 1000MP and SB220

[Elliott Lawrence]

Not sure if the SB220 is like the SB200, but the stock SB200 use a 120 vdc
relay that is keyed by -120 volts.  You don't want to hook this up directly
to the 1000MP solid state keying output without a level shifter having
sufficient current capability and spike protection.

Elliott WA6TLA

Pete Smith wrote:

> At 04:14 PM 11/15/02 -0400, you wrote:
> >Is it me or have the previous respondents missed the point?  Maybe I'm
> >wrong but...
> >
> >I think the writer sometimes runs the MP barefoot in QSK - and other
> >times, runs it with the SB220 (obviously NOT in QSK).
> >
> >His problem, I take it, is NOT how to operate an SB220 in QSK.
> >Instead, when he has the amp offline so he can run barefoot, the MP's
> >amplifier-keying relay is still clicking away, making QSK a nightmare.
> >
> >If it were a TS940, I'd say to unplug the DIN jack that has the TX GND
> >  signal on it.  Doing so disables that relay.  Not elegant, but it
> >works.  I don't know off the top of my head what works in the MP
> >although I'd like to.  A menu setting perhaps?
> >
>
> Good point, Mike -- re-reading it I think you're right.  In that case, I
> would simply set the transceiver up for QSK and then use one of the
> back-panel voltages to key a transistor switch, which, in turn, would key
> the amplifier.
>
> 73, Pete N4ZR
> Sometimes a tower is just a tower
>
> _______________________________________________
> List Moderator: Richard Lubash N1VXW
> 1000mp mailing list
> 1000mp@mailman.qth.net
> To Change Options or Unsubscribe:
> http://mailman.qth.net/mailman/listinfo/1000mp