[amsat-bb] Re: New Preamp

Bryant bryantcw at cox.net
Tue Sep 18 15:15:54 PDT 2007

Dave and the BB-

The thread  on antenna preamps has been very interesting and helpful to me as I'm in the final stages of]  putting my satellite station on the air- [determining where to mount the antennas at the moment].  I checked your  reference to Hamtronics and they are still in business and do offer a wide range of inexpensive preamps.  See http://www.hamtronics.com/lnk.htm.

I wonder if anyone else has had any experience with these preamps and, if so. what were your conclusions?

Also, does anyone know how much affect pine trees have on ham satellite communications?  There are two tall ones within 30 meters of where I'm considering mounting my antennas.

Thanks for all the good ideas that the BB members have shared  over the years.

Bryant, W2RGG/6,
 AMSAT member # 25030

 Original Message ----- 
  From: Dave Guimont 
  To: Jim Jerzycke 
  Cc: amsat-bb at amsat.org 
  Sent: Monday, September 17, 2007 10:53 PM
  Subject: [amsat-bb] Re: New Preamp

  At 09:25 PM 9/17/2007, you wrote:
  >Welcome to the wonderful world of mast-mounted
  >preamps! 90% of the people who get involved with
  >satellites (INCLUDING myself) think they don't *need*
  >a preamp. After doing all you can (better antenna,
  >lower loss feedline, etc) to get your receive setup
  >maxed out, you finally decide to "just try one; I can
  >always sell it on eBay", and are usually amazed at the
  >improvement it gives you.
  >The _first_ thing I suggest to newcomers is to buy a
  >good preamp. Sadly, most are like I was, and stumble
  >around for weeks or months worrying about other things
  >before finally buying one.
  >Congrats, and enjoy your preamp!
  >73, Jim  KQ6EA

  Right on the nose, Jim, and they don't have to be expensive 
  either,....the ones I use are from HAMTRONICS (assume they are still 
  in business).  they are at least 20 years old, built from a kit, and 
  mounted in a wx proof box at the antenna, still functioning 100% and 
  as I remember about 18 bucks at the time.  They outdid  others on a 
  side by side coax switched test, and needless to say the owner of the 
  "big time charlie"was not too happy!!  Hamtronics has pre-built for a 
  few bucks more, or did at that time...Use them, and hang just about 
  any kind of antenna on for what we have flying now....One made from 
  coat hangers would work just fine...And I've said this before.....low 
  loss coax, and prime connectors properly attached.

  I see the "antenna discussers" on here having the time of their life, 
  and more power to them, probably on of the most fun parts of ham 
  radio for some of us, but don't forget to include and calculate LOSES 
  in the entire system.  Your most magic antenna can go down the tubes with them.

              73, Dave wb6llo at amsat.org
                      Disagree: I learn....

                 Pulling for P3E... 

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