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 CuO
layer on the
bare Copper conductor will increase it's resistance. Using an insulated
wire also cause an additional local permittivity increase thus adding some
addition capacitance thus shortening the wire length which is required at
any given frequency. So IMHO, use PVC insulated stranded wire if possible.
73, Gary K5AMH
On 12/20/2020 3:01 PM, Ron Bosch via BVARC wrote:
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 135' random, I built were made from some 16 G PVC coated
copper power wire I had 500' of from an outdoor power run for security
cameras. They all worked, but the wire stretches under strain, so
about every month I have to pull it tight. Eventually this will make
it part. I bought 500' of #14 stranded PVC coated wire from Palomar
Engineers because I fell in love with it after using 50' of it on an
end-fed coil loaded EmComm antenna I built. Once the outdoor
sprinkler power wire parts, I will rebuild the antennas with the PE wire.
Ron
KE4DRF
On Sun, Dec 20, 2020 at 2:33 PM Mark Brantana via BVARC
<[email protected] <mailto:[email protected]>> wrote:
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
<[email protected] <mailto:[email protected]>> wrote:
Consider #17 electric fence wire. Take two or three strands and
twist them together with one end clampied in a vice or something
and the other end in the chuck of a hand drill. it will shrink
so oversize.
It is chap,Find it at Tractor Supply or on line.
John Parmalee
[email protected] <mailto:[email protected]>
281-380-3811
K5VGM WI2XLJ
In a message dated 12/14/2020 8:37:10 PM Central Standard Time,
[email protected] <mailto:[email protected]> writes:
This is link to wire I got and I am VERY impressed with these
guys for help. It is stranded and insulated.
https://palomar-engineers.com/tech-support/tech-topics/ferrite-tutorials/search?keyword=antenna%20wire
<https://palomar-engineers.com/tech-support/tech-topics/ferrite-tutorials/search?keyword=antenna%20wire>
*From:* BVARC <[email protected]
<mailto:[email protected]>> *On Behalf Of *Rick Hiller
via BVARC
*Sent:* Monday, December 14, 2020 8:13 PM
*To:* BRAZOS VALLEY AMATEUR RADIO CLUB <[email protected]
<mailto:[email protected]>>
*Cc:* Rick Hiller <[email protected]
<mailto:[email protected]>>; Mark Janzer
<[email protected] <mailto:[email protected]>>; KJ Anderson
<[email protected] <mailto:[email protected]>>
*Subject:* Re: [BVARC] Antenna wire?
I’d lean toward insulated. Keeps inter-strand noise at a
minimum. 135 feet—- 14 awg stranded at min. Alpha Delta
uses 14 solid for their fan dipoles. So either way works,
depending on how it is deployed.
Wireman, DX Eng and others.
GL. Rick. RH
Sent from my i-Thingamajig
On Dec 14, 2020, at 7:31 PM, Mark Janzer via BVARC
<[email protected] <mailto:[email protected]>> wrote:
Check out:
https://thewireman.com/product-category/antenna-materials/antenna-wire/
<https://thewireman.com/product-category/antenna-materials/antenna-wire/>
Flex weave is nice.
On Dec 14, 2020, at 4:31 PM, KJ Anderson via BVARC
<[email protected] <mailto:[email protected]>> wrote:
I need input. I want to build an additional 40M
EFHW, I’m wondering if the group has input or
guidance on the best kind of wire to use for the long
wire? It appears that the antenna manufacturers are
happy to sell me “high-grade antenna wire” that is
nothing more than regular 14AWG wire I could get
literally anywhere for much less; my question is- has
anyone tried anything more exotic? Is there a flavor
of wire that works better/worse for antennas?
I appreciate you all.
~~~~~~~~~~~~~~~~~~~~~~
73 de KJ5EMP
[email protected] <mailto:[email protected]>
KJ in Cypress
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected] <mailto:[email protected]>
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
<http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org>
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected] <mailto:[email protected]>
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
<http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org>
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected] <mailto:[email protected]>
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
<http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org>
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected] <mailto:[email protected]>
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
<http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org>
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected] <mailto:[email protected]>
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
<http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org>
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected]
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
--
Gary Sitton, K5AMH
[email protected]
SDR/DSP Consultant,
"Have FFTs, Will Travel."
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected]
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
