[Amps] Pi vs Pi-L

Jim Tonne tonne at comcast.net
Wed Feb 1 13:13:56 EST 2006


Mike wrote:

> Low pass filters only attenuate above 30MHz, so are not adequate 
> to meet the requirements on the lower bands.

I think what was meant here was something along the lines of
"A TVI filter cutting off at 30 MHz is not adequate for the
lower bands."  

If I make a 4 MHz lowpass for my 75-meter rig I can easily design 
it to provide adequate attenuation at the second harmonic and above.

- Jim WB6BLD







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