slowflyin Posted October 24, 2022 Report Share Posted October 24, 2022 Lots of post regarding the gear down indicator light but I can't seem to find the correct info. I need to replace the bulb in my Bravo's floor gear indicator. The parts manual calls out a GE 330. Easy enough to find. However, GE specs a 330 at 14V. My AC is a 28-volt bird. Any advice will be greatly appreciated. I'd like to install an LED equivalent. Quote Link to comment Share on other sites More sharing options...
Fly Boomer Posted October 24, 2022 Report Share Posted October 24, 2022 2 minutes ago, slowflyin said: Lots of post regarding the gear down indicator light but I can't seem to find the correct info. I need to replace the bulb in my Bravo's floor gear indicator. The parts manual calls out a GE 330. Easy enough to find. However, GE specs a 330 at 14V. My AC is a 28-volt bird. Any advice will be greatly appreciated. I'd like to install an LED equivalent. I have not had to do it yet, but I have read that the voltage difference just makes the bulb less bright -- which some appreciate at night. Not sure about the LED. Quote Link to comment Share on other sites More sharing options...
slowflyin Posted October 24, 2022 Author Report Share Posted October 24, 2022 I read the voltage/brightness thread as well. However, they were using a 28V bulb in a 14V AC for a dimmer solution. I'd be going the other direction. I'll read the older post again. Thanks for the quick reply! 1 Quote Link to comment Share on other sites More sharing options...
Fly Boomer Posted October 24, 2022 Report Share Posted October 24, 2022 21 minutes ago, slowflyin said: I read the voltage/brightness thread as well. However, they were using a 28V bulb in a 14V AC for a dimmer solution. I'd be going the other direction. I'll read the older post again. Thanks for the quick reply! You are correct, of course. I didn't think that through. Quote Link to comment Share on other sites More sharing options...
LANCECASPER Posted October 24, 2022 Report Share Posted October 24, 2022 1 hour ago, slowflyin said: Lots of post regarding the gear down indicator light but I can't seem to find the correct info. I need to replace the bulb in my Bravo's floor gear indicator. The parts manual calls out a GE 330. Easy enough to find. However, GE specs a 330 at 14V. My AC is a 28-volt bird. Any advice will be greatly appreciated. I'd like to install an LED equivalent. The revised 2006 Illustrated Parts Catalog (page 426) for the Bravo calls out a GE 327 Bulb (28V) https://www.dropbox.com/s/0qikc2nw8wlx70k/mooney_m20m_dx_%26_gx_illustrated_parts_catalog.pdf?dl=0 1 Quote Link to comment Share on other sites More sharing options...
slowflyin Posted October 24, 2022 Author Report Share Posted October 24, 2022 9 minutes ago, LANCECASPER said: The revised 2006 Illustrated Parts Catalog (page 426) for the Bravo calls out a GE 327 Bulb (28V) https://www.dropbox.com/s/0qikc2nw8wlx70k/mooney_m20m_dx_%26_gx_illustrated_parts_catalog.pdf?dl=0 Thanks! Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted October 24, 2022 Report Share Posted October 24, 2022 There are LED equalivents I have these waiting to install, bought two as there was a min purchase amount. Theses are 14V bulbs though, I’m pretty sure 14V Mooney’s get 28V bulbs for dimming, I wonder if your 28V airplane has a dropping resistor, or just has a much brighter light? Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted October 24, 2022 Report Share Posted October 24, 2022 I think you may want this one once you confirm there is no dropping resistor https://www.aero-lites.com/product-page/28V-MF-Indicator Although as it’s a dimmable bulb perhaps it’s what even us 14V guys want if the 14V bulb is too bright? I think if I were doing it again I’d get one 14 and one 28 and see what works best. Quote Link to comment Share on other sites More sharing options...
EricJ Posted October 24, 2022 Report Share Posted October 24, 2022 1 hour ago, slowflyin said: Thanks! This guy: https://www.amazon.com/dp/B08GKY8S7L Quote Link to comment Share on other sites More sharing options...
Guest Posted October 24, 2022 Report Share Posted October 24, 2022 3 hours ago, slowflyin said: Lots of post regarding the gear down indicator light but I can't seem to find the correct info. I need to replace the bulb in my Bravo's floor gear indicator. The parts manual calls out a GE 330. Easy enough to find. However, GE specs a 330 at 14V. My AC is a 28-volt bird. Any advice will be greatly appreciated. I'd like to install an LED equivalent. A 330 bulb in your plane will be very bright for a split second! A 327 bulb or LED equivalent is correct. Quote Link to comment Share on other sites More sharing options...
slowflyin Posted October 24, 2022 Author Report Share Posted October 24, 2022 I agree. I knew better than to use the 330. My error not referencing the most current parts manual. I had it but inadvertently opened the old one. Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted October 24, 2022 Report Share Posted October 24, 2022 So the 14V airplanes use a 28V bulb as a 14V bulb is too bright, But the 28V airplanes use a 28V bulb, but it’s not too bright? What am I missing? You sure the 28V airplanes don’t step the voltage down to 14V and use the same bulb as the 14V airplanes, or why is it not too bright? Quote Link to comment Share on other sites More sharing options...
MikeOH Posted October 25, 2022 Report Share Posted October 25, 2022 5 hours ago, A64Pilot said: So the 14V airplanes use a 28V bulb as a 14V bulb is too bright, But the 28V airplanes use a 28V bulb, but it’s not too bright? What am I missing? You sure the 28V airplanes don’t step the voltage down to 14V and use the same bulb as the 14V airplanes, or why is it not too bright? Or, perhaps, the 28V bulb just isn't designed to be as bright on 28V as a 14V is on 14V? Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted October 25, 2022 Report Share Posted October 25, 2022 31 minutes ago, MikeOH said: Or, perhaps, the 28V bulb just isn't designed to be as bright on 28V as a 14V is on 14V? I guess anything is possible, but these bulbs are used for many things like enunciation panels, and they are identical except for voltage so I’d be surprised if light level is different, but who knows. https://www.aircraftspruce.com/catalog/elpages/gereplacement_11-04016.php https://www.aircraftspruce.com/catalog/elpages/gereplacement_11-04015.php No, seems the 28V draws exactly half the current of the 14V so light output ought to be identical as wattage is the same 1.1 W for each Quote Link to comment Share on other sites More sharing options...
MikeOH Posted October 25, 2022 Report Share Posted October 25, 2022 56 minutes ago, A64Pilot said: I guess anything is possible, but these bulbs are used for many things like enunciation panels, and they are identical except for voltage so I’d be surprised if light level is different, but who knows. https://www.aircraftspruce.com/catalog/elpages/gereplacement_11-04016.php https://www.aircraftspruce.com/catalog/elpages/gereplacement_11-04015.php No, seems the 28V draws exactly half the current of the 14V so light output ought to be identical as wattage is the same 1.1 W for each Further food for thought...note the 14V bulb shows 6 lumens, while the 28V bulb indicates only 4 lumens: Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted October 27, 2022 Report Share Posted October 27, 2022 That should explain it then, curious the 28V bulb is so much less efficient Quote Link to comment Share on other sites More sharing options...
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