Thought that might have been it.  I have one.  Will experiment as well.

Gary Lee
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On Apr 27, 2014, at 5:14 PM, Eric Clegg <[log in to unmask]> wrote:

> HI Gary,
> I was talking about the Mfj-212 box for tuning a manual tuner.
> 
> It emits pulsed noise when you have tuned the tuner correctly to close to a
> 1/1 swr.
> 
> Vectronics also makes a similar box.
> 
> I have the model number at work.
> 
> I am thinking this might be used to tune one of the magnetic loops.
> 
> When I have got lots of time to play such as a holiday weekend I'll have to
> try inserting the 212 between my transceiver and one of my Alex loops and
> see if it works like I think it might.
> 
> Eric
> KU3I