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[rebel-builders] wire routing over doors

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Ken

[rebel-builders] wire routing over doors

Post by Ken » Sun Feb 19, 2012 4:47 pm

There was lots of room between the windshield and the roof to route coax
etc. through on my bird Ron. Highly recommend you do that and keep the
wire bundles out of sight.
Ken

Ron Shannon wrote:
I've been planning to run the wiring that will go over the doors by wrapping
the bundles around the forward door post, enclosed in spiral wrap, or
something similar. See photo at http://n254mr.com/node/298. I've seen
several that are done that way. It looks a little industrial, but not bad.
However, at Arlington I noticed Walter has his wiring going straight up the
forward side of the post, and through a grommet hole in the roof, on top of
the upper carry through. That route is shown by the black, circled "X" drawn
on the roof in the photo. Thanks to Walter <g> now I'm waffling about which
way to do this.

The advantage of the wrap around method shown in the photo is it's easy and
has nice big turn radius. Disadvantages include that it looks little less
dressed down (even when in spiral wrap or similar) and would present a
problematic interface with any insulation or headliner. I don't plan to do
install those at the moment, but I could change my mind, I guess. Advantages
and disadvantages of the second "through roof" route are pretty much the
opposite. The relatively tight radius is probably my biggest concern with
going through the roof. On the left side I have two coax cables -- which are
the most sensitive to turn radius -- and the radius might be pretty tight
for those.

Is this just an aesthetic/headliner/turn radius issue, or are there other
things I haven't thought of yet? Any thoughts would be appreciated.

Ron
254R

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Ron Shannon

[rebel-builders] wire routing over doors

Post by Ron Shannon » Sun Feb 19, 2012 4:47 pm

Thanks, Ken, for that no-waffle recommendation. If coax turn radius isn't
going to be an issue, it does seem like the better plan.

Ron

On Thu, Jul 24, 2008 at 3:49 PM, Ken <klehman@albedo.net> wrote:
There was lots of room between the windshield and the roof to route coax
etc. through on my bird Ron. Highly recommend you do that and keep the
wire bundles out of sight.
Ken


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Richard Wampach

[rebel-builders] wire routing over doors

Post by Richard Wampach » Sun Feb 19, 2012 4:47 pm

Ron both ideas should work
You might try to flatten out the wire bundle that is shown in the photo,
in those tight places and run it through thin wall clear plastic tubing
(spaghetti) find it at hardware stores. This should give you plenty of
clearance to install a headliner and not have an interference or
chaffing issue.

Very important---do not crush coax cables at all. A very tight ty-wrap
will crush the insulation between the inner wire and the braded shield
which changes the impedance of the coax, which reduces the out-put of
the transmitter and the system will radiate RF energy.
As to the bend radius; make as big as you have room for. If you have
excess coax cable, do not wrap it up as a figure "8". Rather make it
about a 6" diameter loop if you have to do it. Best is to shorten the
coax and put on a new BNC connector. Shorter but more gentel turns will
allow a better signal and better function of both com and nav equipment.
Hope to see you at OSH, I should arrive by auto late Sat evening-camp
Scholler, I am on the Rebel travelers list.

Dick Wampach SR-108

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Ron Shannon
Sent: Thursday, July 24, 2008 3:56 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] wire routing over doors

Thanks, Ken, for that no-waffle recommendation. If coax turn radius
isn't
going to be an issue, it does seem like the better plan.

Ron

On Thu, Jul 24, 2008 at 3:49 PM, Ken <klehman@albedo.net> wrote:
There was lots of room between the windshield and the roof to route
coax
etc. through on my bird Ron. Highly recommend you do that and keep the
wire bundles out of sight.
Ken


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Ted Waltman

[rebel-builders] wire routing over doors

Post by Ted Waltman » Sun Feb 19, 2012 4:47 pm

Hello Ron,

My Moose has the wires running as Walter showed you. Seems to work just
fine.

Ted

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Ron
Shannon
Sent: Thursday, July 24, 2008 4:28 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] wire routing over doors

I've been planning to run the wiring that will go over the doors by wrapping
the bundles around the forward door post, enclosed in spiral wrap, or
something similar. See photo at http://n254mr.com/node/298. I've seen
several that are done that way. It looks a little industrial, but not bad.
However, at Arlington I noticed Walter has his wiring going straight up the
forward side of the post, and through a grommet hole in the roof, on top of
the upper carry through. That route is shown by the black, circled "X" drawn
on the roof in the photo. Thanks to Walter <g> now I'm waffling about which
way to do this.

The advantage of the wrap around method shown in the photo is it's easy and
has nice big turn radius. Disadvantages include that it looks little less
dressed down (even when in spiral wrap or similar) and would present a
problematic interface with any insulation or headliner. I don't plan to do
install those at the moment, but I could change my mind, I guess. Advantages
and disadvantages of the second "through roof" route are pretty much the
opposite. The relatively tight radius is probably my biggest concern with
going through the roof. On the left side I have two coax cables -- which are
the most sensitive to turn radius -- and the radius might be pretty tight
for those.

Is this just an aesthetic/headliner/turn radius issue, or are there other
things I haven't thought of yet? Any thoughts would be appreciated.

Ron
254R

PS -- Walter, thanks again for the amphib limo ride across the field at
Arlington.




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Jean Poirier

[rebel-builders] wire routing over doors

Post by Jean Poirier » Sun Feb 19, 2012 4:47 pm

Expert also say to isolate com/nav/antena wires from electrical ones...

Jean
Rebel 747R

Jean Poirier
Pr


Ron Shannon

[rebel-builders] wire routing over doors

Post by Ron Shannon » Sun Feb 19, 2012 4:47 pm

Thanks to all who responded. I've been a ham radio operator since I was 11
and have been doing electronic stuff ever since. I'm not worried about
proximity of coax with the other wires that are in the left side bundle, the
combinations of which were carefully considered. The causes of apparent
interference issues attributed to proximity of coax and most types of other
wires are often mis-diagnosed and usually result from improper or inadequate
grounding systems. I do agree that coax should be handled with care, in turn
radius, mounting, etc.

I'll change to the higher "through roof" routing. Pulling the still
unterminated wires back out one more time is not a big deal, and will give
me an opportunity to polish off a few other things in the over door area I
probably should have done before anyway.

Ron


On Fri, Jul 25, 2008 at 5:07 AM, Jean Poirier <jean.poirier@oxyportneuf.com>
wrote:

[quote]Expert also say to isolate com/nav/antena wires from electrical ones...

Jean
Rebel 747R

Jean Poirier
Pr


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