I was talking about Friday the 23rd.
Sent from my iPhone
On Jun 13, 2017, at 11:49, Ed Hutchinson <ehutch@xxxxxxxxx> wrote:
I presume we are thinking about Friday June 23rd, a week from this Friday.
Ed
On 06/13/2017 09:23 AM, Alan Zaur wrote:
Hi Steve and Chris,
I need to plan my time this weekend to fabricate the antennae. Chris, please
tell me what you want me to put together. Steve, what is the best way to
get the wire from your place to mine?
I have one 4:1 current balun available, and also a 1:1 balun. People
commonly use a 4:1 balun at the feedpoint of an OCFD when it is between 35
and 50 feet above the ground. Operation will be better on 80 meters if we
follow the 4:1 balun with a good choke to reduce the common mode current on
the outside of the coax. Does anyone have a common mode choke we can
borrow. I do have some 2.4 inch ferrite toroids so I can jerry rig a choke
if we use small diameter coax (RG-8x) for the feedline.
Please let me know what you think we need, and what materials you have
available.
Alan
On Mon, Jun 12, 2017 at 2:40 PM, KA1LHZ <sboard.ka1lhz@xxxxxxxxx> wrote:
I only have about 14 miles of military telephone wire (WF-16) we use for
military vehicle displays and antennas. My full wave loop on 160 is made
of this stuff. It's been in the air for about 7-10 years so far. I've
had to replace the corner ropes and a broken connection at the feedpoint
where the ladder line flexed one too many times and broke, but no
problems so far with the antenna wire itself. It will be easy to cut
what you need for a dipole. The wire is dual 17 gauge (think zip cord)
and i think about 220 lb test.
73
DE KA1LHZ
On 06/12/2017 11:28 AM, Alan Zaur wrote:
Good morning, Steve.
I recall at the last meeting you mentioned that you had "lots of
antenna wire" available. I have been thinking about building a 196
foot doublet that we could use as a 40, 80, and 160 meter antenna at
field day, and that I could bring home and use in a similar way at my
station afterward. While I have plenty of antenna wire here, I don't
have anything with the inherent strength to stay aloft in the wind and
snow we get here. I wonder if you have anything strong enough for
this sort of antenna?
I plan to support the doublet in the center and feed it with open wire
line. The dimensions are designed so it will work as a double
extended zepp on 40 meters, a slightly lopsided dipole on 80 meters,
and a shortened dipole on 160 meters. According to my calculations,
the gain of the antenna will only be down 0.1 dbi from a full-sized
dipole on 160. On 160 the antenna is intended for "local" work since
I will have an inverted L antenna as my transmitting antenna for more
serious work. I also plan to erect a K9AY array as a receiving
antenna on the low bands.
Do you have anything suitable you could sell me?
Incidentally, as I mentioned at the meeting, I have several spools of
multi-conductor cable here that I would be happy to share with others
if they have a need for it. Most of it is Belden cable; I can get
you the specific information if you have a need for such things. I am
happy to give it to anyone who can use it.
I also have lots of test equipment here that I am pleased to share
with other members of the club. I have a couple of good
scopes, and
cheap but functional spectrum analyzer/tracking
generator, as well as
RLC meters and the usual DVM's and dummy loads. I would love to find
a better calibrated bench DVM since mine seems to disagree with just
about every other meter I own.
73,
Alan
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