Hi Luc,
I am assuming you meant 7/8 Heliax.
45' of Heliax and a short LMR400 jumper will have around
0.6 dB of loss on 70cm so that just adds 0.6 dB to
the noise figure of your preamp (i.e. ~1.0 dB to ~1.6 db.)
With even a modest gain antenna, you probably will not be
able to notice any
At 01:04 AM 1/24/2010, Luc Leblanc wrote:
Yes again a returning question preamp at the tower or near the shack
I will have to do soon some maintenance work on my satellite
antennas tower. I planned to use 2 heliax 1/78 45' individual line. Each
line will be terminated by high quality 2psp
OK, Luc. To make this decision you need to do the math. But you can
just try comparing performance by installing the preamps at the
antenna and at the shack and make your own evaluation. I'm guessing
that is not convenient as antennas are on a tower.
You mention running two coax
On 24 Jan 2010 at 11:26, Anthony Monteiro wrote:
Date sent: Sun, 24 Jan 2010 11:26:02 -0500
From: Anthony Monteiro aa...@comcast.net
Subject:Re: [amsat-bb] Coaxial line question
To: Luc Leblanc luclebla...@videotron.ca,
