[FoxHunt] 80m Foxhunt Tx

[Marvin Johnston]

I've heard a number of concerns over the years about being able to DF 
the oscillators.

If someone is close enough to DF the oscillator signal, they are 
probably close enough to see the flag. My experience is that rarely can 
the oscillator be heard more than 30 feet or so from the transmitter.

Maybe a concern for championships events, but certainly not for practice.

Marvin


On 2011-12-03 22:30, Dale Hunt wrote:
>
> I'd be concerned with the backwave if the oscillator isn't shut off
> between cycles.  We had this problem in 1999 when the oscillators
> could be DFed when one got close even when the transmitter was off.
>
> I've used this circuit with good results:
>
> http://www.qsl.net/g3pto/pippin.html
>
> simple to build from the junkbox, easy to key, no backwave, and the
> entire final emitter circuit can be replaced by either a parallel
> tuned circuit with a loaded Q of 1 ( 2uH and 1000pf) or a link winding
> around the antenna loading coil.
>
> 	- Dale WB6BYU
>
>
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