[amsat-bb] Re: Preamp Distance from Antenna

Dee morsesat at optonline.net
Wed Mar 30 07:53:32 PDT 2011

Why do you need a preamp in the mobile?  Most new rigs are great at
sensitivity.  You must also remember that if you are mobile, Intermod is
just around the corner at these high sensitivity preamps.
Preamps, as a rule, should be as close to the antenna as mechanically
Good Luck,
Dee, NB2F

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Zachary Beougher
Sent: Wednesday, March 30, 2011 10:24 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Preamp Distance from Antenna


I am in the process of getting the ARR SP432VDG preamp for my mobile setup
(and just to have around), and I have read that the closer to antenna you
mount the preamp, the lower noise figure you will have.  My question is,
what is close to the antenna - 1ft., 5ft., 10ft.?  Ideally, I would probably
mount it about 5-6ft. from the antenna (1/4 wave) - would this be

Any additional advice would be appreciated!

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