[Milsurplus] Pi- Matching Network: When?

[mac]

I find it in my 1935 Radio (magazine) Handbook described as the  
"Collins PI Network."  Not used quite like commonly seen today,  
though.  Appears as an antenna matching circuit fed off a variable tap  
on a conventional PA tank coil.

Dennis D.  W7QHO
Glendale, CA



On Feb 7, 2012, at 5:49 PM, David Stinson wrote:

> Anyone have any idea when the Pi output matching
> network appeared?
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