I've never had a low pass filter help on receive. I haven't run one in a 
long time though.
----- Original Message ----- 
From: "eric oyen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, February 01, 2014 3:21 PM
Subject: Re: Low Pass Filter


> one would think so, however, there are a lot of other devices that =
> produce noise that can be mixed down into the HF bands (either by =
> interstage mixing or inter mod).. a low pass filter is still useful for =
> reducing that incidental noise to acceptable levels. Also, when it comes =
> to a phone patch, those are still useful (as cell phones don't work in =
> all places).
>
> I read this somewhere: "don't forget what you already know".
>
> -eric
>
> On Jan 31, 2014, at 11:31 PM, Howard Kaufman wrote:
>
>> With modern radios and modern television, their is little need for a =
> low=20
>> pass filter.
>> If you are going to use one, it should be as close to the transmit =
> output as=20
>> possible.  With so few stations transmitting from channels 2 through =
> 6, and=20
>> the modern rigs having both auto tune and internal tuner features, I =
> think=20
>> the low pass filter has gone the way of the phone patch, and the 
>> plate=20=
>
>> modulator.
>>=20
>>=20
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