Today's Message Index:
----------------------
1. 05:06 AM - Re: LED / Overvoltage Indicator (f1rocket@comcast.net)
2. 08:38 AM - DIY crowbar OV module update (Robert L. Nuckolls, III)
3. 09:43 AM - Re: DIY crowbar OV module update (Michel Therrien)
4. 08:21 PM - Re: does length matter (vor coax hookup..) (CardinalNSB@aol.com)
Message 1
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| Subject: | Re: LED / Overvoltage Indicator |
--> AeroElectric-List message posted by: f1rocket@comcast.net
David,
You need another resister across the light to prevent current leakage in the off
state. You can reference this electrical diagram:
http://f1rocket.home.comcast.net/Alternator.pdf
Randy
F1 Rocket
> --> AeroElectric-List message posted by: "David Schaefer" <dschaefer1@kc.rr.com>
>
> Bob .. I've just finished wiring the low voltage lights on both my B&C
> alternators.
>
> I used LEDs with a 470 ohm 1/2 watt resister in front of the plus-side per
> the manufacturer's instructions to protect the LEDs. However, when the low
> voltage condition is gone, the LEDs dim but don't go out completely!! I
> thought there was an electrical problem until I realized that the voltage
> regulator 'thinks' the lamps are out.
>
> What can I do to completely shut off the LEDs once the voltage regulators
> indicate there is no longer an error condition? Is this because they
> usually use incandescent lights?
>
> Regards,
>
> David
>
>
>
>
>
>
Message 2
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| Subject: | DIY crowbar OV module update |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
A number of folks have elected to fabricate their own crowbar
over voltage protection modules per instructions published at:
http://www.aeroelectric.com/articles/crowbar.pdf
I'm being asked in increasing numbers to assist builders in
trouble shooting non-working assemblies. I don't have uncommitted
time to indulge myself in this activity so I've updated
plans for the crowbar OVM to include a trouble shooting guide.
While crafting the revised instructions, some refinements
to the circuit were made. If you have an OVM crafted to the
older plans which is functioning, there is no need to immediately
"update" your installed unit. However, new units under construction
and older units removed for the annual bench test should
be updated to the latest drawings as published above.
Bob . . .
-----------------------------------------
( Experience and common sense cannot be )
( replaced with policy and procedures. )
( R. L. Nuckolls III )
-----------------------------------------
Message 3
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| Subject: | Re: DIY crowbar OV module update |
--> AeroElectric-List message posted by: Michel Therrien <mtherr@yahoo.com>
Does this affect the purchased version of OVM? (I
bought the OVM-14 few years ago).
--- "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
wrote:
> --> AeroElectric-List message posted by: "Robert L.
> Nuckolls, III" <bob.nuckolls@cox.net>
>
>
> While crafting the revised instructions, some
> refinements
> to the circuit were made. If you have an OVM crafted
> to the
> older plans which is functioning, there is no need
> to immediately
> "update" your installed unit. However, new units
=====
----------------------------
Michel Therrien CH601-HD, C-GZGQ
http://mthobby.pcperfect.com/ch601
http://www.zenithair.com/bldrlist/profiles/mthobby
http://pages.infinit.net/mthobby
__________________________________
http://promotions.yahoo.com/new_mail
Message 4
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| Subject: | Re: does length matter (vor coax hookup..) |
--> AeroElectric-List message posted by: CardinalNSB@aol.com
If I read the archives correctly, the "balun" used in my 1968 Cessna is
unnecessary.
Is there any "correct length" that the split of the coax inner and shield
should be made?
thanks, skip simpson
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