Hi Andre! > Good point, a preamp is to cancel out the cable losses, anymore and you are > just boosting the background noise and not improving the reception. > So if your cable is very short there is not point in using a preamp.
I have never used a preamp when working satellites. If your station - radio(s), antenna(s), and feedline - are good enough, you may not need to invest in preamps. > I even dare to say that you can have more succes using a portable setup then > a fixed instalation with preamps and elevation rotors because you can adjust > polarisation, theoreticly this can give a gain upto 30 dB, in practice > somewhere between 3 and 9 dB. Very true! I'm working with portable setups, even from my back yard like I showed in the videos I posted earlier today, and do well without preamps. I use short RG58 coax runs - 10 feet (3m) from antenna to radio or diplexer, and 3 feet (1m) from diplexer to radios if I am working SSB/CW. Modifying K4FEG's statement to "YOU *MAY* NEED A PREAMP" would be more accurate. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
