----- 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@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@san.rr.com

Disagree: I learn....

Pulling for P3E...