[amsat-bb] Re: Turn off AGC when receiving BPSK-1000

[i8cvs]

  ----- Original Message ----- 
  From: i8cvs 
  To: Dave Guimont 
  Sent: Saturday, August 20, 2011 6:54 AM
  Subject: Re: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000


  Hi Dave, WB6LLO

  Please look also at my article "Experimental Investigation of 2400 MHz
  Quadrifilar Helix Antennas" publisched on AMSAT-Journal May/June 2004

  Best 73" de 

  i8CVS Domenico

  Pulling for P3E... 
    ----- Original Message ----- 
    From: Dave Guimont 
    To: i8cvs ; amsat-bb at amsat.org 
    Sent: Friday, August 19, 2011 11:40 PM
    Subject: Re: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000




      For additional information read

        http://www.w2du.com/r2ch22.pdf

      and look at Fig 22-7 page 10 of 20 Radiation Pattern of the 1 1/2
      turn 1,25 wavelenght Quadrifilar Antennas.

    Tnx, Dom for that info.

    I received a number of requests for quadfilar information, again.

    Goto

    http://cid-1973adc8c1d3207c.skydrive.live.com/summary.aspx?sa=140581470 
    and see the five files starting with the pic Quad2.4gigs

    Be very precise with the measurements, particularly on the 435...
    I scaled it from the 2 meter, made a slight measuring error on the driven filar, shortened it by 1/4" and the swr went from 3 to 1 to 1.6 to 1....

    And use the BEST "N" connectors and coax that you can find, the most expensive part of the antenna....





                  
               73, Dave, WB6LLO
                   dguimon1 at san.rr.com

                       Disagree: I learn....

                  Pulling for P3E...