Today's Message Index:
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1. 04:03 AM - grounding mag p lead shield...which side? (Bob Verwey)
2. 06:42 AM - Re: grounding mag p lead shield...which side? (Charlie England)
3. 07:00 AM - Re: grounding mag p lead shield...which side? (John Tipton)
4. 01:34 PM - Re: grounding mag p lead shield...which side? (Charlie England)
5. 10:51 PM - Re: grounding mag p lead shield...which side? (Bob Verwey)
Message 1
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| Subject: | grounding mag p lead shield...which side? |
switch side or mag side?
Message 2
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| Subject: | Re: grounding mag p lead shield...which side? |
On 7/31/2015 6:01 AM, Bob Verwey wrote:
> switch side or mag side?
>
Suspend normal thought about shields when looking at magnetos.
The shield is the return path to short out the mag when the mag switch
is 'off' (note the quotes).
http://www.aeroelectric.com/articles/MagnetoSwitchOptions.pdf
Center conductor to the points in the mag, shield grounded to the mag case.
At the other end, center conductor to one terminal of your mag switch,
and the shield to the other terminal. When the switch is *closed*
(continuity across the terminals), the mag is *off*. When the switch is
*open* (off, in normal terminology), the mag is *on*.
Message 3
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| Subject: | Re: grounding mag p lead shield...which side? |
Correct: that is why we are told (this side of the pond anyway) during our t
raining to treat the prop as always being live, just in case the grounded (
mag switches in the off position) wire 'isn't' grounded
John
Sent from my iPad
----x--O--x----
> On 31 Jul 2015, at 02:43 pm, Charlie England <ceengland7@GMAIL.COM> wrote:
>
>> On 7/31/2015 6:01 AM, Bob Verwey wrote:
>> switch side or mag side?
> Suspend normal thought about shields when looking at magnetos.
>
> The shield is the return path to short out the mag when the mag switch is '
off' (note the quotes).
> http://www.aeroelectric.com/articles/MagnetoSwitchOptions.pdf
>
> Center conductor to the points in the mag, shield grounded to the mag case
.
>
> At the other end, center conductor to one terminal of your mag switch, and
the shield to the other terminal. When the switch is *closed* (continuity a
cross the terminals), the mag is *off*. When the switch is *open* (off, in n
ormal terminology), the mag is *on*.
>
>
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>
Message 4
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| Subject: | Re: grounding mag p lead shield...which side? |
I should have added:
Be sure to check the switch for 'closed' position (continuity between
terminals) *before* hooking up the mag wires. A regular ohm meter can't
tell the difference between shorted terminals of the switch turned on,
and the very low DC resistance of the mag's coil primary winding (that's
where the P-leads are connected) when the switch is switched open.
If you're using regular SPST toggle switches as mag switches, just mount
them 'upside down' so that the switch's 'on' label is on the bottom.
On 7/31/2015 8:59 AM, John Tipton wrote:
> Correct: that is why we are told (this side of the pond anyway) during
> our training to treat the prop as always being live, just in case the
> grounded (mag switches in the off position) wire 'isn't' grounded
>
> John
>
> Sent from my iPad
>
> ----x--O--x----
>
> On 31 Jul 2015, at 02:43 pm, Charlie England <ceengland7@GMAIL.COM
> <mailto:ceengland7@GMAIL.COM>> wrote:
>
>> On 7/31/2015 6:01 AM, Bob Verwey wrote:
>>> switch side or mag side?
>>>
>> Suspend normal thought about shields when looking at magnetos.
>>
>> The shield is the return path to short out the mag when the mag
>> switch is 'off' (note the quotes).
>> http://www.aeroelectric.com/articles/MagnetoSwitchOptions.pdf
>>
>> Center conductor to the points in the mag, shield grounded to the mag
>> case.
>>
>> At the other end, center conductor to one terminal of your mag
>> switch, and the shield to the other terminal. When the switch is
>> *closed* (continuity across the terminals), the mag is *off*. When
>> the switch is *open* (off, in normal terminology), the mag is *on*.
>> **
> --> http://www.matronics.com/Navigator?AeroElectric-List
> http://www.matronics.com/contribution
> <3D%22http://www.matronics.com/contribution%22>
> *
Message 5
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| Subject: | Re: grounding mag p lead shield...which side? |
Thats why I love this list! Thanks Charlie!
On Friday, July 31, 2015, Charlie England <ceengland7@gmail.com> wrote:
> On 7/31/2015 6:01 AM, Bob Verwey wrote:
>
> switch side or mag side?
>
> Suspend normal thought about shields when looking at magnetos.
>
> The shield is the return path to short out the mag when the mag switch is
> 'off' (note the quotes).
> http://www.aeroelectric.com/articles/MagnetoSwitchOptions.pdf
>
> Center conductor to the points in the mag, shield grounded to the mag case.
>
> At the other end, center conductor to one terminal of your mag switch, and
> the shield to the other terminal. When the switch is *closed* (continuity
> across the terminals), the mag is *off*. When the switch is *open* (off, in
> normal terminology), the mag is *on*.
>
> *
>
>
> *
>
>
--
Best...
Bob Verwey
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