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  #11  
Old 03-19-2021, 05:44 AM
Walt's Avatar
Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 6,018
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Quote:
Originally Posted by Skykingbob View Post
These dimmers were recommended to me by the large avionics shop doing my harness. I bought the two pot model for my flood lights I have in my RV8. you can get one to four circuits. They will prefab the harness for an extra fee if you want them to.

https://www.aircraftspruce.com/catal...sptdimming.php
Quote:
Originally Posted by mfleming View Post
G3X and GAD 27...these are the dimmers SteinAir sent me for my setup.
You don't need big voltage regulating dimmers for the G3X/GTN equipment, the above are for light bulb style dimming where the unit being dimmed is actually drawing current from the dimmer to control it.

The G3X/GTN stuff is voltage sensing and doesn't actually draw any current from the dimmer circuit, it just tracks the voltage which is why a simple pot works fine.
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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1900+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #12  
Old 03-19-2021, 05:46 AM
flysrv10 flysrv10 is offline
 
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Location: Florida
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Thank you all for your replies.
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  #13  
Old 03-19-2021, 08:35 AM
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g3xpert g3xpert is offline
 
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Location: Olathe, KS
Posts: 3,015
Default G3X Touch Backlight

Quote:
Originally Posted by TShort View Post
So is it for sure 1K?

I've been chasing an issue with mine since the panel re-do 3 years ago. It is SUPER sensitive, and only works through ~5-10% of the range. I've not troubleshot it much as I don't need to adjust the lighting often.

I just looked, and I bought that same model in 10K.

So, if it is supposed to be 1K, I may have found the problem...
Hey Thomas,

Can you email us a screenshot of your Backlight Configuration Menu? We can take a look at the settings and see if there is any room for improvement.

Thanks,

Justin
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  #14  
Old 03-19-2021, 08:44 AM
snoop9erdog snoop9erdog is offline
 
Join Date: Oct 2005
Posts: 276
Default GTN Self dimming?

Quote:
Originally Posted by Walt View Post
You don't need big voltage regulating dimmers for the G3X/GTN equipment, the above are for light bulb style dimming where the unit being dimmed is actually drawing current from the dimmer to control it.

The G3X/GTN stuff is voltage sensing and doesn't actually draw any current from the dimmer circuit, it just tracks the voltage which is why a simple pot works fine.
Can you go in and dim the GTN or G3X within the unit? If so, is there a real need other than convenience to have the dimmer?
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  #15  
Old 03-19-2021, 08:56 AM
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Walt Walt is offline
 
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Quote:
Originally Posted by snoop9erdog View Post
Can you go in and dim the GTN or G3X within the unit? If so, is there a real need other than convenience to have the dimmer?
Yes you can, but nothing beats the ease of use of a separate pot to adjust.
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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1900+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #16  
Old 03-19-2021, 09:45 AM
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mfleming mfleming is offline
 
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Location: Joseph, Oregon
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Quote:
Originally Posted by Walt View Post
You don't need big voltage regulating dimmers for the G3X/GTN equipment, the above are for light bulb style dimming where the unit being dimmed is actually drawing current from the dimmer to control it.

The G3X/GTN stuff is voltage sensing and doesn't actually draw any current from the dimmer circuit, it just tracks the voltage which is why a simple pot works fine.
Well bummer... these dimmers were expensive...

So will these work with the GAD 27?
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Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017
Started on QB fuselage 01/2018
Sliding canopy mostly completed 10/2020
Wiring completed
Avionics harness build in progress
Donated for 2021 and so should you

Last edited by mfleming : 03-19-2021 at 09:50 AM. Reason: Add content
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  #17  
Old 03-19-2021, 10:05 AM
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Walt Walt is offline
 
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Quote:
Originally Posted by mfleming View Post
Well bummer... these dimmers were expensive...

So will these work with the GAD 27?
Yes, just overkill.
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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1900+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #18  
Old 03-19-2021, 11:02 AM
jliltd jliltd is offline
 
Join Date: Sep 2013
Location: Rancho San Lorenzo
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Every time I have played with my external dimmer pot during daylight my G3X screen intantly goes so dim it is effectively blacked out where I cannot see anything. Not just gradually but instantaneously. Then the dimmer pot does nothing to help bring it back up. I have to pull the breaker on the GDU dispaly and then reset the breaker to re-boot it in flight. As such I don't ever touch the dimmer knob any more as I would rather not loose primary flight instruments in the air.
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Last edited by jliltd : 03-21-2021 at 11:55 PM.
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  #19  
Old 03-19-2021, 11:48 AM
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Walt Walt is offline
 
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Location: Dallas/Ft Worth, TX
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Check your settings Jim, here's a couple of pics to help, these are my settings and should work for most foks, mine works perfect, the first 2 pics are with dimmer bus off, the last pic is with the dimmer 'bus' on at about the 50% dim level.





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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1900+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154

Last edited by Walt : 03-19-2021 at 11:54 AM.
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  #20  
Old 03-20-2021, 09:29 AM
TShort TShort is offline
 
Join Date: Jan 2005
Location: Indianapolis, IN (KUMP)
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Quote:
Originally Posted by g3xpert View Post
Hey Thomas,

Can you email us a screenshot of your Backlight Configuration Menu? We can take a look at the settings and see if there is any room for improvement.

Thanks,

Justin
Justin-

Will do - thanks for the message.
This has been on my to-do list for a while, but I just keep putting it off and using the time to fly instead!
I'll get some screenshots when I am at the airport next.

Thomas
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RV-10 N410TS bought / flying
RV-8 wings / fuse in progress ... still
1948 Cessna 170 N3949V
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