Does anyone still use a folded dipole with an appropriate impedance matching balun today? Not the broadband type that B & W sells, but the old monoband basic folded dipole, that many operators used 50 years ago. ???

-- Cliff, W4ZFL

On Thu, 28 Aug 2003 02:20:37 GMT, "Cliff Gieseke"
wrote:

Does anyone still use a folded dipole with an appropriate impedance matching balun today? Not the broadband type that B & W sells, but the old monoband basic folded dipole, that many operators used 50 years ago. ???

-- Cliff, W4ZFL

Fifty years ago they fed it with open transmission line and a balun
was not needed.

Danny, K6MHE

Back then, as a teenager, I had one with 300 ohm twinlead and a short run of
coax between a balun and a Harvey Wells TBS50c. ... A number of old timers
then were, of course, using open line feeders.

Cliff, W4ZFL

Fifty years ago they fed it with open transmission line and a balun
was not needed.

Danny, K6MHE

Cliff,

M2, HyGain, and at least one CushCraft use the 4:1 balun that consists of a
1/2 wave section of coax on some beams. Gets kind of long below 10 meters,
but no reason it wouldn't work with a folded dipole. You would end up with
about 70 Ohms.

Tam/WB2TT
"Cliff Gieseke" wrote in message
.. .
Does anyone still use a folded dipole with an appropriate impedance matching
balun today? Not the broadband type that B & W sells, but the old monoband
basic folded dipole, that many operators used 50 years ago. ???

-- Cliff, W4ZFL

Cliff Gieseke wrote:
Does anyone still use a folded dipole with an appropriate impedance
matching balun today? Not the broadband type that B & W sells, but the
old monoband basic folded dipole, that many operators used 50 years
ago. ???

Most hams use a 4:1 balun with a folded dipole instead of the more
complicated 6:1 balun. "300 ohm" window line usually has a Z0 less
than 300 ohms. The stuff I have is about 275 ohms.
--
73, Cecil http://www.qsl.net/w5dxp



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In the ARRL antenna book, in the chapter on portable antennas, there is
an article on a folded dipole using 300 ohm tv twinlead, which is
matched using a capacitor, or a stub of 300 ohm twinlead.

I've had one of these for 80 meters for over two years, and I'm quite
happy with it. I made it with "rat shack" TV twinlead, exactly
according to the cookbook, and it has a 1:1 SWR right at 3775. My rig
has no problem matching across the entire band, and the SWR around 3510
or 3990 is just approaching 3:1.

I chose to use the stub match, because I had the twinlead handy.
Dressing the stub away from the feed line is the biggest drawback I found.

Its mounted as a shallow vee, with the apex at about 50 feet, ends at
about 30 feet.

Just a different method of matching, but its simple and functional.

73,
W4KAZ

I used a folded dipole on 15 and 40 from 1992-2000 when I moved to a much
larger lot.
I used mine with a Johnson Matchbox, so I did not need a 6:1 balun.
Ed, N5EI
"Cliff Gieseke" wrote in message
.. .
Does anyone still use a folded dipole with an appropriate impedance matching
balun today? Not the broadband type that B & W sells, but the old monoband
basic folded dipole, that many operators used 50 years ago. ???

-- Cliff, W4ZFL