REFLECTOR: Position Light Wires
Kurt Winker
nmflyer1 at aol.com
Thu Jun 27 14:19:44 CDT 2013
Sounds good. Thanks much!
KW
Sent from my iPhone
On Jun 27, 2013, at 13:11, Brian Michalk <michalk at awpi.com> wrote:
> Only shield wires that:
> 1) radiate a lot of noise (capacitively -- i.e., have a large dv/dt)
> 2) are sensitive to noise
>
> Position lights are very quiet, and you don't care if they collect noise from other sources.
>
> Strobes are noisy, so twisting and shielding the power/ground leads works there. If your strobe power pack charge pump is RF noisy (bad capacitors) then, yes, shielding is needed, but IMO, that's treating the symptom.
>
> On my airplane, it's very quiet electrically. The big offenders: electronic injectors, coil packs, alternator are all twisted power/ground pairs.
>
> I do not shield ANY of my avionics (not even microphones). They are quite happy with the arrangement. Proper grounding is the key to a noise free airplane.
>
> On 6/27/2013 1:59 PM, nmflyer1 at aol.com wrote:
>> All,
>>
>> Quick question on Position Light wires.
>> I am getting ready to put the wings back on after WAY too much time painting & buffing.
>> Looked in the manual and Knuckols book, and can not find the answer to this.
>> Is there need to use shielded wires for the Position lights Only, within the wing?
>>
>> I could run standard wires,
>> I could run separate shielded power/ground wires
>> I could run a 16G shielded wire using the center as Power and the Shield as Ground.
>> (the power feed down the duct IS a shielded wire.)
>>
>> All will transfer the power of course, just curious about possible whine in the radios due to the power line running near the antenna wire.
>>
>> Input please.... Need to get these big mutha wings on while I have a luxury day off :)
>>
>> Thanks,
>>
>> Kurt
>>
>>
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