is it ladder line, twin lead, or window line?
Window line, which is basically the insulated version of ladder line, will
be 450 ohms, though apparently it does come in 300 ohm versions, which is
smaller, narrower in width, than the 450 ohm stuff.
Twin lead is flat cable without the open spaces and will be 300 ohm.
I suspect a 4 to 1 balun will deal equally as well with whatever kind of
line you have.
I like the idea of a short run of coax out of the shack connected to the
ladder line through a 4 to 1 balun. Less RFI and less swr and tuning issues
that way.
Of course, this can all be argued endlessly lol.
If you can get the ladder/window/twin lead to the tuner, go for it, but if
not, just use the coax with or without a 4 to 1 balun...the tuner will take
care of it either way.
73
Colin, V A6BKX
----- Original Message -----
From: "Michael Ryan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, November 02, 2012 11:51 AM
Subject: Re_ladder line missmatch and quick deploy 40/10M portable antenna
> Hi John and all:=20
>
> The ladder line in question came from a commercial type G5RV sold at =
> Radio World in Toronto. It lists the line as 300 ohm. This line also has =
> a transformer attached to it with 50 feet of coax.=20
> Now, to my next post: I'm researching an antenna solution for my =
> apartment. I'm only a casual op, where my 102 station is currently set =
> up at my parents QTH and I'd like to move it into my spare bedroom of my =
> apartment.=20
> I'd like a quick deploy 40 to 10M antenna. something that I could place =
> out side my window and temporarily run my coax in and when finished, =
> simply take it down and put it away until next time.=20
> Of course, it would be a bit of a pain to put up and take down each time =
> I'd want to operate but that's life in an apartment. An antenna that =
> doesn't require constant fiddling with alligator clips and coils for =
> operating on each band but I suppose I could have a switch box built to =
> handle that.=20
> Our club uses a Hy-gain vertical which one of the members did this kind =
> of mod. I'm checking into the model # but don't think Hy-gain makes this =
> antenna any more. the house! LOL=20
>
> 73:=20
>
> Michael De VO1AX=20
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