----- Original Message -----
From: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>
To: "Jim Reid" <reidj021@hawaii.rr.com>
Sent: Tuesday, October 11, 2005 6:46 PM
Subject: Re: [Amps] FL2OOOB
> PS....I wonder if Dave Leeson, W6NL, published that in his book on Yagi
> antennas?
>
> 73,
>
> Mike
> WB2AJI
> ----- Original Message -----
> From: "Jim Reid" <reidj021@hawaii.rr.com>
> To: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; "ZL2AAA"
> <zl2aaa@paradise.net.nz>; <amps@contesting.com>
> Sent: Tuesday, October 11, 2005 4:54 PM
> Subject: Re: [Amps] FL2OOOB
>
>
> >
> > > The first thing to try is to lengthen the coax between the amp and the
> > > transceiver.
> > >
> > > I would recommend that the cable be at least 20 feet in length, RG 8
> type
> > > coax.
> >
> > Yes, Dave Leason wrote a piece about this coax "transformer effect"
> several
> > years ago. His explanation, the coax "circuit" forms a double peaked,
> broad
> > band impedance match. I have forgotten the math, but recall it did
make
> > sense. Others claimed all the coax did was introduce some loss,
> > in effect "fooling" the reflections into believing the mismatch was
> > not so bad. Such lossy padding is very common in microwave
> > circuits. But Dave's math did show loss is not the controlling
> > variable here, it is, in fact a broad band, double resonant
> > impedance transformation device which solves the match problem
> > Interesting stuff,
> >
> > Best Jim W6KPI/KH6
>
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