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Old November 14th 03, 03:17 AM
'Doc
 
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Tarmo,
Or, you could look at it in the opposite way. The
tuner would replace the beam, tower, and rotor at a
net savings of ~probably~ the price of the tuner. I
wonder why people are so 'afraid' of tuners?
'Doc
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Old November 14th 03, 05:38 PM
Tarmo Tammaru
 
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"'Doc" wrote in message ...


Tarmo,
Or, you could look at it in the opposite way. The
tuner would replace the beam, tower, and rotor at a
net savings of ~probably~ the price of the tuner. I
wonder why people are so 'afraid' of tuners?
'Doc


OK, how about this:

I was just listening to an EA8 on 20 meters. He was S9 on the tribander, and
S4 on the 75 meter antenna.

Also, why have a no tune transmitter when you have to retune the antenna
tuner when you change frequency.

Tam/WB2TT


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Old November 16th 03, 05:35 AM
'Doc
 
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Tarmo,
Wrote in part;
Also, why have a no tune transmitter when you have to retune the antenna
tuner when you change frequency.


Well, lets see.
1. No tower, or room for a beam antenna.
2. Hand, wrist, and arm not broken, sprained, strained, or lazy.
3. The 'no tune' transmitter wasn't ~my~ idea. I don't mind
tuning.
4. Simplifies antenna system.
5. Even if I think antennas are beautiful, neighbors don't.
6. Don't really care if 'they' hear me S-9 or S-4, as long
as they hear me. Same for hearing 'them'.
7. Had a tribander. The loop did as well and in some instances
better. (Do have to admit the tribander wasn't up very high.)
8. Don't have to worry about a rotor and everything associated
with
one.
9. And... we're talking about a "best" 'all around antenna'
which
implies not having several.

No ~one~ antenna does everything well, there are always
compromises
in performance vs. simplicity. Some would rather use a tuner
than
have a number of antennas, some won't. I really don't think
it'll
make much difference either way...
'Doc
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Old November 12th 03, 04:23 PM
JDer8745
 
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Howdy, Toy

Best all around antenna is a center fed doublet fed with balanced TL such as
transmitting twin lead, ladder line, or open wire line.

Make sure that the sending end of this TL "sees" balanced source.

Mine is 130 ft long fed with 300-Ohm transmitting twin lead. I use it on all
bands 80 thru 10. I have also used it on 6M with my tuner straining to get a
match.

On 40 the theoretical gain over a dipole is said to be 1.8 dB.

If you can only have one antenna, this is your best bet.

73 es gud luck, Jack K9CUN

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Old November 12th 03, 04:28 PM
Cecil Moore
 
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JDer8745 wrote:
Best all around antenna is a center fed doublet fed with balanced TL such as
transmitting twin lead, ladder line, or open wire line.


He asked for the best all *round* antenna.
Your antenna is not round at all. :-)
--
73, Cecil http://www.qsl.net/w5dxp



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Old November 13th 03, 07:15 AM
Troy - VK2HXY
 
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Thanks heaps to all who have replied so far. It really is nice to see so
many people willing to share the knowledge with those less in the know.

Warmest regards to all, and if anyone want's to make more recommendations,
feel free.

73 de VK2HXY
Troy
Sydney
Australia

"Cecil Moore" wrote in message
...
JDer8745 wrote:
Best all around antenna is a center fed doublet fed with balanced TL

such as
transmitting twin lead, ladder line, or open wire line.


He asked for the best all *round* antenna.
Your antenna is not round at all. :-)
--
73, Cecil http://www.qsl.net/w5dxp



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Old November 17th 03, 08:59 AM
Michael
 
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"JDer8745" wrote in message
...
Howdy, Toy

Best all around antenna is a center fed doublet fed with balanced TL such

as
transmitting twin lead, ladder line, or open wire line.


Dont forget a balanced feedline radiates along the line. You may have to
deal with this somehow with the Australian Communications Authority's new
radiation guidelines.




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Old November 17th 03, 03:41 PM
Cecil Moore
 
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Michael wrote:
Dont forget a balanced feedline radiates along the line.


If the currents are balanced, most of the photons are
re-absorbed by the free electrons. OTOH, if the currents
inside a coax feedline are not balanced, an unbalanced
feedline radiates along the line.
--
73, Cecil http://www.qsl.net/w5dxp



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Old November 18th 03, 02:04 AM
Michael
 
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I actually meant to say induced currents not radiated since this is near
field.

Given that the ACA's radiation guidlines talks about near fields and not far
fields its probably appropriate to consider induced currents from open wire
feeders to nearby people.

As most transceivers have an unbalanced output its just as easy to make it
unbalanced at the antenna end of the transmission line anyway unless you
want to use the transmission line as part of the antenna / impedance match.
Then you can be reasonably sure there will be no radiation induced into
humans near your transmission line and be in compliance with the ACA
regulations (and safer for others I guess).



"Cecil Moore" wrote in message
...
Michael wrote:
Dont forget a balanced feedline radiates along the line.


If the currents are balanced, most of the photons are
re-absorbed by the free electrons. OTOH, if the currents
inside a coax feedline are not balanced, an unbalanced
feedline radiates along the line.
--
73, Cecil http://www.qsl.net/w5dxp



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Old November 18th 03, 02:15 AM
Michael
 
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"Michael" wrote in message
...
I actually meant to say induced currents not radiated since this is near
field.

Given that the ACA's radiation guidlines talks about near fields and not

far
fields its probably appropriate to consider induced currents from open

wire
feeders to nearby people.


From memory it specifies maximum volts/area to the distance where person can
gain access to the antenna.

It also mentions a maximum flux/area or it could be a certain induced
current in some standard measurement device I think. I haven't looked at it
for over a year now. It all doesn't matter too much when youre using coax
anyway so then you can use the standard tables they give you.





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