Today's Message Index:
----------------------
1. 08:05 AM - Re: Icom External Antenna (b young)
2. 03:00 PM - Re: Icom External Antenna (Gary Aman)
3. 07:31 PM - western Pa fly in (awcbs)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Icom External Antenna |
Gary Aman wrote "This is actually covered in a March post from Boyd
Young, but I need some more particulars if you don't mind.Looks like
RG58, but what lengths do I start with before tuning with the SWR meter
Boyd?
Thanx G.Aman "
Gary Aman and the group
Gary had posted this picture of my antenna attached
'boyd-antenna.jpg'
I got to the airport yesterday and what I measured was, the center
conductor seemed as best as I could measure "21 1/2 inches" the braid
should be just as long but I would have had to remove all the floor
panels to measure it.
attached are some more pictures of the installation.
'Braid-location.jpg' shows the coax which is RG58 with bnc
connector,,, as it goes to the left front of the nose cone. ( the
length of the coax is not critical, long enough to reach without kinks
and pulls but the shorter the better, the length of the center
conductor and braid is critical. with the center conductor length being
most critical) also it shows the braid of the coax angling back to
under the floor panels. (I had to try different angles to get the best
swr.
'antenna-center.jpg' shows the center conductor going up vertical along
the left side of the nose cone. and the braid doubling back through the
fabric.
antennaleft.jpg shows the mid section of the antenna center conductor
vertical up the left side and across the top.
'antennaend.jpg' shows the antenna going across the top of the
nosecone. the antenna end in the photo coming from the right side is
my elt antenna, and the black long rubber duck in the front is my ham
radio tracker. with the tracker running, my wife can check my progress
on long trips so she does not have to worry. and if the track stops in
the middle of nowhere, she knows where to send the search.
you can see I mounted the center conductor as well as the braid in short
sections of drinking straw siliconed to the inside of the nose cone.
sections of duct tape were used in the trials. but with time would fall
off.
the 21 1/2 inches is the finished measurement + or - my measuring
skills while standing on my head, over under around and through the
rudders peddles and nose cone. I started with 25 inches and cut to
length and changed position of both the center conductor and braid,
while using an antenna analyzer that our ham radio club owns. it is
not the perfect location and I am sure I could improve radio coverage
with an external antenna and a better ground plane. but it works well
enough for my needs.
boyd young
kolb mkiii n1225y
ham radio extra n7wfm
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Icom External Antenna |
Thanks Boyd,
That's pretty much the way I installed it.So far I have'nt found a SWR to t
une it with,but it did.not interfere with flying because i just switch the
coax at the radio,a quick change from one antenna to the other.
Thanks for all the pics.I appreciate all your efforts. G.Aman, P S Marj s
ays say hi to Becky!
-----Original Message-----
From: b young <byoungplumbing@gmail.com>
Sent: Wed, Aug 15, 2012 11:05 am
Subject: Re: Kolb-List: Icom External Antenna
Gary Aman wrote "This is actually covered in a March post from Boyd Young,
but I need some more particulars if you don't mind.Looks like RG58, but wha
t lengths do I start with before tuning with the SWR meter Boyd?
Thanx G.Aman "
Gary Aman and the group
Gary had posted this picture of my antenna attached 'boyd-antenna.jpg'
I got to the airport yesterday and what I measured was, the center conduc
tor seemed as best as I could measure "21 1/2 inches" the braid should be
just as long but I would have had to remove all the floor panels to measure
it.
attached are some more pictures of the installation.
'Braid-location.jpg' shows the coax which is RG58 with bnc connector,,, a
s it goes to the left front of the nose cone. ( the length of the coax is
not critical, long enough to reach without kinks and pulls but the shorte
r the better, the length of the center conductor and braid is critical. wi
th the center conductor length being most critical) also it shows the bra
id of the coax angling back to under the floor panels. (I had to try diffe
rent angles to get the best swr.
'antenna-center.jpg' shows the center conductor going up vertical along th
e left side of the nose cone. and the braid doubling back through the fabri
c.
antennaleft.jpg shows the mid section of the antenna center conductor ve
rtical up the left side and across the top.
'antennaend.jpg' shows the antenna going across the top of the nosecone.
the antenna end in the photo coming from the right side is my elt antenna,
and the black long rubber duck in the front is my ham radio tracker. w
ith the tracker running, my wife can check my progress on long trips so she
does not have to worry. and if the track stops in the middle of nowhere,
she knows where to send the search.
you can see I mounted the center conductor as well as the braid in short se
ctions of drinking straw siliconed to the inside of the nose cone. section
s of duct tape were used in the trials. but with time would fall off.
the 21 1/2 inches is the finished measurement + or - my measuring skill
s while standing on my head, over under around and through the rudders pe
ddles and nose cone. I started with 25 inches and cut to length and chan
ged position of both the center conductor and braid, while using an antenn
a analyzer that our ham radio club owns. it is not the perfect location
and I am sure I could improve radio coverage with an external antenna and a
better ground plane. but it works well enough for my needs.
boyd young
kolb mkiii n1225y
ham radio extra n7wfm
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | western Pa fly in |
Since the UL's and Lsa's have really picked up in this area we have decided to
have the
first annual fly in at McIntyre Pa private air strip. Slated for Aug 31, thru
sept 3. bring a tent and tie downs, or just stop in for a day. will have food drink,
fire and good
company. Google 15756 and look for the dog leg runway. New north south runway should
be completed by then. Drive-in's welcome.
we have a firefly and a mix of other ul's based there. anything that flys is welcome.
contact me if ya have any questions,
AJ
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381000#381000
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|