Hey, some people still use phone patches especially those in MARS. Not all 
the time but enough.
----- Original Message ----- 
From: "Howard Kaufman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, February 01, 2014 1:31 AM
Subject: Re: Low Pass Filter


> With modern radios and modern television, their is little need for a low
> pass filter.
> If you are going to use one, it should be as close to the transmit output 
> as
> possible.  With so few stations transmitting from channels 2 through 6, 
> and
> the modern rigs having both auto tune and internal tuner features, I think
> the low pass filter has gone the way of the phone patch, and the plate
> modulator.
>
>
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