[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Quadrifilar home brew

Apparently some people are having success after constructing the 
quadrifilar antenna described at:


The antenna construction file is Quadfil1.zip and describes measurements 
for 2M, 435 and wx antennas.  Very inexpensive (the N connector costs more 
than the rest of the antenna) and easy to build, but measure the lengths 
carefully, particularly at 435, and obviously a short and low loss feed line...

The users keep asking me for gain figures, and I have absolutely none...
Coverage is nearly hemispherical, and estimating 2-3 db at boresite...with 
an estimated beamwidth of 150...

I have a narrative for some comparisons at ANTEVAL.TXT.

Be very happy to answer questions.  I've not tried it on AO-51, but it 
should work very well reading reports on HT users...I'm very interested in 
your successes or failures...

It worked, but producing a very weak signal, when AO40 was at minimum 
squint angles...Another reason for me being anxious to do the testing on 

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

               Pulling for P3E... 

No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.7.2 - Release Date: 3/11/2005
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org