Ron, this work hardens the wire and removes the normal annealing. This can
be done with most soft metals: copper, silver, brass, but not aluminum
which must heat tempered like 6061-T6.
Gary
On December 20, 2020 9:57:30 PM Rick Hiller via BVARC wrote:
Ron,
One way that I found to
You might have the same luck using a light bulb for an antenna-at least it
will be cheaper
On Sun, Dec 20, 2020 at 10:32 PM Mark Brantana via BVARC
wrote:
> Anyone have any experience with an Isotron antenna?
>
> Mark
> N5PRD
>
>
> Brazos Valley
Rick,
Now that is a nice idea, I have done the same with 10 AWG Solid Copper Wire
by looping the end and spinning it with a drill to make 2M antenna elements
that stand straight, nice idea with the strung wire as well!
Ron
KE4DRF
On Sun, Dec 20, 2020 at 9:57 PM Rick Hiller via BVARC
wrote:
>
Anyone have any experience with an Isotron antenna?
Mark
N5PRD
Brazos Valley Amateur Radio Club
BVARC mailing list
BVARC@bvarc.org
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
Ron,
One way that I found to pre-stretch wire before putting it up is to anneal
it. Cut it to length or a bit longer. Tie one end to a fixed point and
then at the other end wrap it around a hammer handle a few times then walk
backward till the wire is tight. Then holding the hammer to your
If you want to see just what the differences are. Go to
https://chemandy.com/calculators/round-wire-ac-resistance-calculator.htm
Chemandy electronics has a nice selection of calculators for all types of
electronic issues. AC wire resistance is one of them that is applicable
to this antenna
The diameter of the wire will affect the bandwidth. Ohms law works in terms of
IR loss. I recall seeing a picture of an eighty meter antenna at W1AW that was
several wires held apart to get enough bandwidth to cover 80. #14 is a good
place to start or strands wound as below, 73John
Ron, Mark, Gary. BVARC.Have a read of the March 2020 BVARC Beacon
The Radio Hotel column "Wire -- Simply Wire". It is about wire (duh) and
references Rudy Severns, N6LF, who did a study on wire.
http://www.bvarc.org/newsletter/202003.pdf
Also read November Beacon
All:
Uninsulated Copper wire will oxidize over time forming a dark oxide layer
on the wire. Copper oxide (CuO) is an electrical conductor but with higher
resistance than Copper. Since the skin depth at higher frequencies is very
thin, 0.001'' or less, and is a function of bulk resistivity, a
Mark,
Assuming copper clad or copper wire, anything above 21 AWG is fine for any
freq greater than 160M from a skin effect standpoint. After that it is all
about tensile strength vs ductility. Too ductile and it will sag. too
brittle and it will part. The first three HF antennas, including my
Is there some correlation for transmission power and frequency vs wire gage
required? Or is it essentially all about structural stability?
Mark
N5PRD
> On Dec 15, 2020, at 12:11 PM, john Parmalee via BVARC wrote:
>
> Consider #17 electric fence wire. Take two or three strands and twist them
http://www.arrl.org/rookie-roundup
> On 12/20/2020 11:59 AM terry leatherland via BVARC
> wrote:
>
>
> What's the scoop on when/where?
>
> Terry Leatherland, K5PGF
> 281-455-8090
> Sugar Land, Tx
>
>
>
> On Sunday, December 20, 2020,
What's the scoop on when/where?
Terry Leatherland, K5PGF281-455-8090Sugar Land, Tx
On Sunday, December 20, 2020, 09:32:20 AM CST, PHILIP BARTASH via BVARC
wrote:
Gentlemen, As a rather novice HAM myself and also CWAcademy advisor
with new students giving their all today, I
Gentlemen,
As a rather novice HAM myself and also CWAcademy advisor with new students
giving their all today, I ask you guys to get out there and give those rookies
a contact.
Please take time out to give our new CW operators a nice welcome! I knew it
meant a lot to me when I was doing the
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