Changing from coax to ribbon lead (300 ohms, 600 ohms etc) will do a lot of
things, far more than space here provides for. Briefly, the feed point
impedance will change dramatically requiring an antenna tuner, if tuned
incorrectly, the feed line could radiate, the resonant frequency of the
antenna can change depending on many factors, one of which is how you treat
the ribbon lead, i.e; as a balanced feed line or as a single wire
unbalanced.
Bottom line is that the ribbon offers so much more versatility bit you need
to understand what your doing or it's all for not.
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----- Original Message -----
From: "David Perry" <david.perry3@...>
To: <FT817@...>
Sent: Tuesday, May 22, 2001 5:47 AM
Subject: Re: [FT817] Re: USER REPORT: DX, ANTENNAS (MP-1), ETC!!! Long
Post...
i have a coax fe 40m dipole. if i change to ribbon, will that do?
david
----- Original Message -----
From: <julian@...>
To: <FT817@...>
Sent: Tuesday, May 22, 2001 9:05 AM
Subject: [FT817] Re: USER REPORT: DX, ANTENNAS (MP-1), ETC!!! Long Post...
If I had a tree, I'd be inclined to try a 20m resonant dipole fed
with TV 300 ohm ribbon. With an ATU it might be possible to use it on
40 thru 15m. Simple, cheap to make, and light. Anyone tried it?
Julian, G4ILO
--- In FT817@y..., harry.edwards@s... wrote:
Arlan..I'm just using the Alpha Delta DX-EE 40-10M dipole. I
picked
it up at HRO. It has an OAL of about 42'. I just stuck it up in an
Ash tree in my back yard. One end is only about 7' AGL(!).
I'll be putting it up at 30' feet this weekend for the next test.
Stay tuned.
:harry
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