[AMPS] rollers

[2@vc.net (measures)]

>
>> >Air.
>> >
>> How?
>
>It flows in from the space around the coil and the coil core because 
>the coil is suspended between thin support rails. It's amazing new 
>technology, 

The Johnson 226 series of variable inductors were similar to this. 

This is way different than the variable inductor that was reportedly used 
in the MFJ 3kW tuner.  
> 
thanks, Tom

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