[RFI] Is a low pass filter necessary?

Andy ingraham.ma.ultranet at rcn.com
Fri May 11 05:45:46 PDT 2012

> Perhaps new low-pass filters have a higher corner frequency to
> accommodate the rash of HF rigs (and now the Elecraft KPA500
> amplifier) that include 6-meter coverage ...

I thought the ordinary HF low-pass filters were and still are designed
for up to HF only, so they don't pass 6 meters which is VHF.  I
wouldn't expect that to change unless the filter specifically states
it extends to 6 meters, or 2 meters or 440 (since those two are likely
to appear on the current rash of modern all-band rigs).


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