[Amps] Pi-L Network

[Peter Chadwick]

Tom said:
>It's pretty tough and very expensive to obtain the perceived 
harmonic advantages of a pi-L in the real world of 
multi-band amps. It's much cheaper to do it other ways.<
So why did so many professional continuous coverage QRO amps (7.5kW and up) go to the trouble of a pi-L then?
I know of at least 4 different manufacturers who did so....
73
Peter W6/G3RZP this week