I heard an interesting story direct from Dr Dave Leeson (Wrote: Physical
Design of Yagi Antennas)
Who teaches various RF/antenna courses at Stanford U.
Dave told me he had a student from Japan, who was meticulous in his lab
work. Seems the student got consistently bad results from his formula
derived measurements and dimensions for gamma matches. Consistently off by
a factor of 2 with respect to some part of the impedance matching equation,
or possibly a dimension. (I dont recall the exact details)
Dave's super student hound dogged this discrepancy (kind of like Cliff
Stoll in the Cukoo's Egg) and found out that an error, early on (decades
ago) in Gamma Matching design publications propagated erroneous info on the
Gamma match. This is a great story, that someone should talk to Dave about,
73, DX, de Pat AA6EG email@example.com;
>From: "Tom Osborne" <firstname.lastname@example.org>
>To: "Towertalk" <email@example.com>
>Subject: Re: [TowerTalk] The simple Gamma Match?
>Date: Wed, 17 May 2006 17:51:10 -0700
> > Now to the question: HOW DO YOU BUILD A GAMMA CAPACITOR OUT OF ALUMINUM
> > TUBING?
>Click on this link
>Found a bunch of stuff on google on gamma matching. One looks pretty good
>using 2 pieces of aluminum tubing and a plastic insert. 73
TowerTalk mailing list