Thanks David, but the balun matches the high-impedance longwire to the
low-impedance antenna input. Now I'm connecting to a high-impedance input,
but want to achieve the same level of shielding.


"David" wrote in message
...
On Sun, 1 Oct 2006 09:14:51 -0400, "Unrevealed Source"
wrote:

My outdoor longwire antenna works just about as well as I could imagine.
Very long wire, very high, attached to shielded 50ohm coax about 40 feet
from the house to avoid all the noise, and connected through a MLB. I get
amazing reception on all my radios.

So now I have a second "listening post" on another floor, and have decided
that I'll feed a high-impedance antenna to that spot. Some radios, mostly
my older ones, don't have a low-impedance input, just the normal
slotted-screw antenna wire hookup. This will give me an easy way to play
with these.

I might try a slinky outside, or maybe not. (Any real-world opinions on a
slinky vs. long wire?)

My real question is this: Can I use similar 50ohm shielded coax as my
feedline, to take advantage of the shielding and get the antenna away from
the house? I would of course not use the balun or even the connectors,
just
connect the antenna to the center conductor, and strip away enough inside
the house to connect the center conductor directly to the radio. Will
this
work? Is it a sound design?

Thanks,
Jeff

Use the ''balun'' to match the wire to the transmission line. Connect
the center conductor of the transmission line to the ANT screw on the
receiver, and the shield to GND. Ground the mess according to local
codes.

- Unrevealed Source wrote:
- Thanks David, but the balun matches the high-impedance longwire
- to the low-impedance antenna input. Now I'm connecting to a high-
- impedance input, but want to achieve the same level of shielding.

US,

Using the Right Matching Transfomer at Both Ends of the Coax Cable :
[ When using the Radio / Receiver's HI-Z Terminals ]

1 - Long Wire Antenna-to-Coax use a 9:1 Step-Down-Transformer.

2 - Coax-to-Receiver-HI-Z-Terminals use a 1:4 Step-Up-Transformer.

yes it is that simple - iane ~ RHF