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Part: MaxDim 9100-001-A Panel Dimmer





This is the STC'd panel dimmer to replace the scratchy or worn out rheostat on your panel that dims the incandescent panel lights.

The STC applies to all Cessna 150 models F thru M. It does NOT apply to earlier C150's or to the C152
It also applies to 365 other GA aircraft types including 172 / 177RG / 182 and most of the Piper fleet.

ALL paperwork is included. AMOC letter, STC, Installation Instructions, Flight Manual Supplement, Instructions for continued Airworthiness and Manufacturer PMA approval.



The paperwork weights AT LEAST four times the weight of the part - so you know it must be good....

This is not new and was fitted for less than 10 hours before I realized I did not need two. It does not include the decal that goes on the panel - but it you are putting it in the hole where the old one is coming out - your panel is marked with the curved arrow that indicates which way to turn it to dim it.

$340 new at Aircraft Spruce - https://www.aircraftspruce.com/catalog/elpages/maxDimUnit.php?clickkey=10866632

Yours for $150 cash or check. $165 if you use PayPal. Free shipping in the lower 48. Shipping elsewhere - I will quote.

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A one-knob panel dimmer is getting less possible with a mixture of old and new avionics. The old devices had incandescent lights that were dimmed by reducing their voltage. Newer devices have LED lighting which draw so little current that the voltage from the original rheostat drops abruptly rather than smoothly, and so does the light from any directly powered LEDs. Worse yet, some of the newer devices have a dimming input that provides maximum light with zero volts applied, and dims as the voltage is increased.

I've ended up just using the overhead red flood at maximum intensity.

And there's even a problem with that: A number of avionics units have a photocell to automatically dim as the ambient light decreases. Several of these, at least, are sensitive to red light and therefore don't dim when the red flood is on. I've solved that problem by taping a little piece of green colored plastic film over the photocells.

Roy

The install instructions and instructions for continued airworthiness caution against using the unit to deal with modern Avionics lighting. The supplied wiring diagram shows clearly the intent of the dimmer is for the original incandescent panel light setup.

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