[CQ-Contest] lock-outs

[Tim Duffy]

The lock out method we use is to tap the PTT line of the run radio. That way
the run radio always has priority so as to minimize the chance of run frequency
loss.

So the 2nd station can only transmit at the sole discretion of the run radio.
The PTT line of the run radio drives a small relay that breaks the mic line or
CW key line of the 2nd radio whenever the run station transmits. I also include
an LED so the 2nd station knows when the run station is transmitting so that it
can get its timing straight in a pile up.

I hope that helps!

73,
Tim K3LR


Jim Reisert AD1C wrote:

> At 10:21 AM 11/6/2000 -0500, Rick Dougherty wrote:
>
> >Hello all...our small multi-multi has finally decided amongst the ops that
> >we need to have a second station on the bands in order to be more
> >competitive...wonder if Tim K3LR, Frank W3LPL ,and Matt KC1XX would be
> >willing to share their lockout methods with the contesting community.
>
> At KC1XX we have a couple of extra radios for listening only.  We enter new
> stations into CT's bandmap and the run operator can grab them if the rate
> slows down.  So we have no lockout issues because we only have one
> transmitter per band.
>
> 73 - Jim AD1C
>
> --
> Jim Reisert AD1C <jjreisert at alum.mit.edu>
> http://www.ad1c.com
>
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