Some of that data for two types of coils is on my web page at
http://www.k1ttt.net/technote/airbalun.html, it might give you some idea
of what you are looking for and some of the things you must consider.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: towertalk-admin@contesting.com [mailto:towertalk-
> admin@contesting.com] On Behalf Of Eric Scace K3NA
> Sent: Thursday, January 09, 2003 16:06
> To: Topband; John Brosnahan W0UN; Towertalk
> Subject: [Towertalk] balun measurements
>
> Hi --
>
> Where would I find measurements for baluns at various frequencies
when
> attached to a mismatched load? I'm specifically
> interested in:
>
> 1. Balun types of interest:
> -- the coil of transmission line.
> -- the transmission line passing through a chain of ferrite beads;
> e.g., Force12
> -- other rod/toroid baluns, if available.
>
> 2. Measurements of interest:
> -- equivalent L-C-R network, if possible.
> -- attenuation
> -- phase shift from the load (antenna) to generator (feedline
> attachment) side
> -- impedance transformation from the load (antenna) to generator
> (feedline attachment) side
>
> I'm particularly interested in understanding the impact of a balun
on
> signals in a transmission line across a band, when looking
> into the shifting complex impedances presented by real antennas
outside of
> resonance. I've checked "Transmission Line Transformers"
> (2nd edition, ARRL), but the only data is attenuation when operating
into
> a load of Z=Zo.
>
> Thanks for any tips for data.
>
> -- Eric K3NA
>
>
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