AR3201 Harness?

On Mar 6, 12:54*pm, "noel.wade" wrote:
Thanks, All!

I have the original manual, but the wiring diagram on mine is printed
as bad (or worse) than the ones on W&W (thanks, Tim!)

Since I'm into digital/computer stuff (I love unshielded-twisted-
pair).... *which of the connections in the radio harness are important
to use sheilded wire with? *I'm assuming that I don't need to sheild
_every_ wire. *Shielded wire seems to come in pairs or triplets, so it
would be nice to only use a few of those and then a bunch of single
(unshielded) wires bundled together with spiral-wrap or something like
that. *Any tips or advice?

As far as the CBs go: *The Klixon units have actually been in the
glider the whole time; they just weren't wired well (yes, a previous
owner wired both glass 1A fuses AND 1A CBs in serial, for every item
in the aircraft - oof!). *I've flown for 6 hours on this original
setup with an aging/tired 7ah battery and been OK (though it was
marginal at the end). *I changed the battery-box this winter and am
now running 12ah - 14ah batteries. *I should be able to fly for 8 - 10
hours now, which is plenty for me! *I recharge my batts every night,
and have 2 (so I can fly all weekend without a recharge if I need
to). *For the curious, my ship has an SNAV (with analog vario), Tasman
Vario, B400 Vario (as a backup), ewMicroRecorder, IPAQ 4700 PDA, and
Becker AR3201.

Regarding inspection: *I don't think I need an A&P to sign off my
electrical work. *None of the instruments that are powered are "safety
of flight" or "required for VFR" items. *Of course, I've had to take
apart the panel and _that_ has required a disconnection of the Pitot/
Static system - which I am also changing (because I discovered the
original Altimeter was never hooked up to the static lines!! *I always
wondered why my GPS / PDA / SNAV all disagreed with the Altimeter by a
couple-hundred feet)... *So the glider will be going for its annual as
soon as I've completed the wiring, and I'm sure it will be given a
close look by my A&P at that time. :-)

Thanks again, take care,

--Noel

The wiring to worry about is the microphone wiring, and headset mic
wiring if you happen to have a headset. I'd also go to some effort to
roue the the mic wires away from any other things that could be
putting out electrical noise. The wiring diagram will show those as
shielded. Nothing else needs to be shielded.

BTW some folks seem to think the braid on some of the Becker harnesses
is a shield. It's just a nylon shroud to keep the wires bundled.

Darryl

Quick follow-up question:

The stock diagram and Becker harness uses the outer braid of the
shielded wire as a ground connection.

Could I use the inner braid as the signal wire and a _separate_ wire
as the ground wire? This would avoid requiring me to solder the ground
connection onto the outer braid and make it easier to fab up the wire
harness; but I'm dumb when it comes to electrons so I don't know if
the ground connection is needed in order for the shielding to be
effective...

Help?

Thanks!

--Noel

On Mar 9, 3:56*pm, "noel.wade" wrote:
Quick follow-up question:

The stock diagram and Becker harness uses the outer braid of the
shielded wire as a ground connection.

Could I use the inner braid as the signal wire and a _separate_ wire
as the ground wire? This would avoid requiring me to solder the ground
connection onto the outer braid and make it easier to fab up the wire
harness; but I'm dumb when it comes to electrons so I don't know if
the ground connection is needed in order for the shielding to be
effective...

Help?

Thanks!

--Noel

Noel, you have to ground ONE side and not the other for the grounding
to work. If you don't, those electrons can't go anywhere, and if you
ground both sides you get the potential of current flow through the
bonding connection you create.

do what the diagram and manual show.
using the shield is very simple and common.....just strip the insulation
back an inch or so, separate the shield wires to free them from the center
insulator, twist them together and slide a piece of heat shrink tube over
the shield wires and you then have another wire.
tim
Please visit the Wings & Wheels website at www.wingsandwheels.com

"noel.wade" wrote in message
...
Quick follow-up question:

The stock diagram and Becker harness uses the outer braid of the
shielded wire as a ground connection.

Could I use the inner braid as the signal wire and a _separate_ wire
as the ground wire? This would avoid requiring me to solder the ground
connection onto the outer braid and make it easier to fab up the wire
harness; but I'm dumb when it comes to electrons so I don't know if
the ground connection is needed in order for the shielding to be
effective...

Help?

Thanks!

--Noel