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Old 05-13-2018, 05:52 AM   #1
kenjfrance
 
Join Date: Oct 2011
Location: Nakusp, B.C., Canada
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Default Whelan A600 strobe/position lights

Strobe/position lights are now drawing much more power than before...other power draws including radio, elect. fuel pumps, haven't changed on the ammeter. All lights still work....replaced position lights with LEDs previously, and had significant drop in amp usage (many hours ago)....now, even they seem to be drawing excessively. Replaced power supply many hours ago because I reversed polarity....new supply worked normally for many hours....ideas?
Ken (mod. 4, 914, 1300 hrs.)
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Old 05-13-2018, 07:21 AM   #2
Danzer1
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Default Re: Whelan A600 strobe/position lights

Are both the strobes and position lights drawing more power? And how much more?

Is the strobe power supply a Whelan?

Are the position light leds Whelan?
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Old 05-13-2018, 08:39 AM   #3
kenjfrance
 
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Default Re: Whelan A600 strobe/position lights

Can't tell if both are drawing the same, as volt/ammeter just shows the drop in the total system...I have a split toggle switch for the strobes and the position lights, and turning each on separately shows a considerable drop in voltage and increase in amperage flow.....strobe draw probably 6 - 7 amps and pos. Light draw 3-4 amps. I would suspect voltage reg. or charging circuit, except other electrical draws are not affecting the meter abnormally. The LED replacement lights are not Whelan, but the newer power supply is direct replacement, and all items have been working normally for past 100 or so hours.
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Old 05-13-2018, 09:41 AM   #4
Danzer1
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Default Re: Whelan A600 strobe/position lights

May be that the LED's don't have a driver or don't have the correct driver to regulate the supply voltage to match the LED requirements. If that is the case the draw will go up until the LED's eventually burns out. If I remember correctly, Whelan has retrofit LED's with integral matched drivers.

7 amps for strobes sounds normal, 4 amps for pos. also sounds normal for the std. lights, but not for LED's - hence my thought that the driver is not regulating the flow correctly.

If not occuring with other electrical devices, I doubt it's the regulator or in the charging circuit.
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Old 07-23-2018, 09:48 AM   #5
Maverick
 
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Default Re: Whelan A600 strobe/position lights

I have an un-related question to the power issue. Where are folks mounting the Whellan circuit control box in the KF fuselage?
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Old 07-25-2018, 06:56 PM   #6
Dave S
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Default Re: Whelan A600 strobe/position lights

Maverick,

Don't have a Whelan; but do have a similar unit of another brand. I mounted a separate double flash control box in each wingtip rather than mount a single control unit in the fuselage. I couldn't get used to the idea of running a high voltage cable past my fuel tanks. Two sets of 12 V wires to each wing tip - one for the strobes and one for the position lights.

Also figured with two control boxes, if one took a dump (which one did) I'd at least have one working strobe till I got back home.
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