drake had a tv-3300-lp with a 33Mhz cutoff and a
tv-1000lp which moved the cutoff up so that they
rated it for 1KW up to 30Mhz and 200 watts up to 52 Mhz.
I have two of the tv-1000lp and one of them has shifted it's
response so that it's pretty well useless on 6M.
Mark n2qt
-----Original Message-----
From: Pete Smith N4ZR
Sent: Friday, May 11, 2012 8:57 AM
To: rfi@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
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000
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).
>
> Andy
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