[hackpgh-ham] Re: Inexpensive HF QRP Dipole antenna design
- From: Doug Philips <douglas.philips@xxxxxxxxx>
- To: hackpgh-ham@xxxxxxxxxxxxx
- Date: Tue, 4 Jan 2011 11:17:39 -0500
On Tue, Jan 4, 2011 at 11:06, Ed Paradis <legomaniac@xxxxxxxxx> wrote:
> One thing on an antenna like this: you need a balun or a tuner with a
> balun built in. (You'll see some binding posts on the back labeled
> "Balanced" or "BAL")
>
I was wondering about that too.
That's reminded me... I have see this kind of 'same wire is feed and
antenna' kind of design before...
I was talking to the WASH radio club folks before our competition balloon
launch, on the subject of a 10m CW low-power "fox-hunt style" signal. They
suggested an end-fed 1/2 wave dipole design made from coax. Some of the
folks were concerned about balun and suggested several loops (7-9 IIRC), and
others suggested that at the power levels we were talking about a (<1 watt),
it just didn't matter.
So... since the antenna in the URL I sent was QRP, maybe its also a matter
of "in theory you need a balun, but in practice it doesn't matter"? I'm not
sure if these are analogous designs though.
-D
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