I'm a T1 owner and I use the 44 and 88 foot dipoles. I can say with
experiance that everything Ken says is true. You just can't do better.
73 Karl
Kenneth A. Christiansen wrote:
Hi from Fargo, ND and many camp sites.
This is the antenna I have used for the last 5 years in my camper
Thanks to everyone who provided advice on my antenna
question.
My Elecraft balun kit showed up today and I am going to get it
built. I will try out of some of the ideas from this message
thread and hopefully get some good outside operating in over
the next month. I think I have everything I
Kieth,
A dipole cut for 40 meters will provide a high feedpoint impedance on 20 -
and the L network used in the Elecraft tuners do not do high impedances very
well.
Of course, all that does depend on your feedline length as well as the
flattop length - the feedline will act as an impedance
Craig,
Thanks for the info. I checked out the Elecraft baluns you
mention and will order one up. This sounds like a reasonable
size setup for the times when I can get up a center pole to
support the antenna. Is there a preferred height for the apex
or do I just go as high as I can?
I do
Don Wilhelm wrote:
Kieth,
A dipole cut for 40 meters will provide a high feedpoint impedance on 20 -
and the L network used in the Elecraft tuners do not do high impedances very
well.
I find the T1 does very well with a very high impedance. I end feed
1/2 wave wire connected right to the
Don,
Right now my feedline length is 0. I have not built the antenna
yet. I work about 20 mins from HRO and hope to swing over
there at lunch. I have seen ladder line there before.
It sounds like the 22 feet per side is a common length that
works for people. I will start with that. It
Keith, KB3ILS wrote:
It sounds like the 22 feet per side is a common length that
works for people. I will start with that. It also sounds like I
should test different feedline lengths as well to get the best
setup.
--
Another approach many use to get
Kieth,
This is a portable field antenna for me, and I have made the feedline from a
pair of twisted #22 teflon insulated wires. Some years back, someone on
QRP-L did some tests on various feedlines, and this turned out to have good
loss characteristics, and it is flexible and lightweight which
I find the T1 does very well with a very high impedance. I end feed
1/2 wave wire connected right to the T1 with a counterpoise and it
matches right up! I ran a test and the T1 can match a 4700 ohm resistor.
So it's not bad with high resistance.
73 Karl
Rick,
Like everything else It all depends...
In your particular case, it depends on how the elements are oriented - and
that includes the counterpoise. It also depends on the proximity of ground
and other objects. Is the counterpoise in the air, or is it laying on the
ground?
That is the
Keith, the absolute all around easy, and works every time, antenna is the
simple balanced dipole; a half wave long for the band in use. You can use a
tuner with it and ladder line or TV twin lead feeder on higher bands.
The other simple portable antenna is the loaded ground plane. You can do
Stuart,
Thanks for the quick response. For a field dipole I could use
that in an inverted V format I assume? I did purchase a
collapsable pole to try some of those out. If I used ladder line
or twinleadwould I need a balun in-line before connecting to
the T1?
If I understood you
For a field dipole I could use
that in an inverted V format I assume? I did purchase a
collapsable pole to try some of those out. If I used ladder line
or twinleadwould I need a balun in-line before connecting to
the T1?
If I understood you correctly, I could cut the dipole for 40M
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