[RFI] Is a low pass filter necessary?
ks7s at cox.net
Fri May 11 06:17:57 PDT 2012
B&W made the FL-6/1500, which cut off above 54 MHz - that's what I use here.
I'm sure they had an HF model too.
73 Jim KS7S
From: Pete Smith N4ZR
Sent: Friday, May 11, 2012 5:57 AM
To: rfi at contesting.com
Subject: Re: [RFI] Is a low pass filter necessary?
Back in the day, I believe Drake made two - a cheaper one that rolled
off between 40 and 50 MHz, and one intended specifically for 6 meters,
with a sharp roll-off above the band and below Channel 2.
73, Pete N4ZR
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On 5/11/2012 8:45 AM, Andy wrote:
>> 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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