[ARC5] A simple receiver improvement

[Rob Atkinson]

My investigation albeit limited, backs up what Carl found.  A few
months ago I came across the Zook article in ER and as I was working
on getting a 50 ohm line to work with a 200 ohm rx antenna Z, I got a
"TV balun" and put a 300 ohm carbon resistor on the balanced end and
swept it with a MFJ swr analyzer.  The result was that below around 40
meters it fell apart (electrically).   The pure resistance dropped to
a few ohms.   These devices are indeed made with tiny cores and hair
thin or thinner wire.

I made my own balun but at least below 20 meters, I noticed no
difference in performance with it in, or the 50 ohm coax line
connected directly to the rx antenna terminals.  They might help a
SX25 on 10 meters but my conclusion was that for the low bands the TV
baluns should stay with the TV set.

73

Rob
K5UJ