At 8/4/2004 05:25 AM, you wrote:
>I use an ARR preamp on my 6 meter repeater and optimum performance is with
>a 3dB pad (if I remember the value correctly) on the INPUT of the
>preamp. Now, this may seem crazy to some, but it works. I learned this
>from Jay who owns ARR here in Connecticut.
It works on 6 meters because your antenna noise temperature is much higher
than the noise temperature of the pad/preamp combination. If you need a
preamp on a 6 meter receiver though, I would think the receiver must be a
little deaf.
That method can never yield good performance at UHF, where antenna noise
temperatures are much closer to ambient (295 K).
Bob NO6B
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