Re: [amsat-bb] Coax

[Stephan Greene <sgreene@xxxxxxxxxxx>]

On Sat, 16 Oct 1999, STEVE DIGGS wrote:

 > The key thing that now makes me reconsider the wisdom of using very low
 > loss feedline is that I also mounted preamps right at the sat. beam
 > antennas for best recieve performance. After using the setup for a year
 > or so, it seems that the preamps make SO much difference, that I don't
 > operate without them. If that is the case, then the low loss aspect of
 > my feedline doesn't matter as much, because all that really matters now
 > is the loss of signal between the antenna and the preamp. The preamp
 > itself has enough output signal that RG213 would have done the job just
 > fine. Get the drift here? I think if I had it all to do over again, I
 > would just buy the best preamps I could find and use average loss
 > feedline. This thinking doesn't apply for antenna setups without
 > preamps.

I'd add it also doesn't apply as much on the transmit side, unless you can
eitehr mount an amplifier at the tower or the attenuation is tolerable.

73 Steve  KA1LM

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Stephan A. Greene                            sgreene@patriot.net    
Senior Systems Specialist, VA Linux Systems  sgreene@valinux.com
Mid-Atlantic Region                          703-980-3475
Amateur  KA1LM@amsat.org  Grid FM18hx        38 59'83.33"N 77 23'6.15"W
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