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KT-76C lighting

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sarg314(at)comcast.net
Guest

Posted: Sat Jun 24, 2006 12:22 pm Post subject: KT-76C lighting

Perhaps some one with a KT-76C transponder can explain this.



I have an old KT-76C, not installed yet, and am trying to figure out the 

display lighting.  The operating manual describes adjusting the display 

brightness by selecting "TST" mode and pushing the 0 key to decrease 

brightness and  7 key to increase it.  Sounds great - it controls it's 

own brightness.



However, the pinout on the connector specifies that pin 2 should be 

hooked up to the 14v panel light dimmer.  Why 2 brightness controls?  

Does this input on pin 2 actually power the LED display?  Why not just 

connect this to +12v and use the front panel feature to control 

brightness?  If I do hook this up to a dimmer, how much power does it 

draw?  I can't find any reference to power consumption in the specs.



Thanks,

--

Tom Sargent, RV-6A

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FLYaDIVE(at)aol.com
Guest

Posted: Sat Jun 24, 2006 1:53 pm Post subject: KT-76C lighting

In a message dated 6/24/06 4:25:37 PM Eastern Daylight Time, 

sarg314(at)comcast.net writes:



 	  Quote: 	
		   However, the pinout on the connector specifies that pin 2 should be 

  hooked up to the 14v panel light dimmer.  Why 2 brightness controls?  

  Does this input on pin 2 actually power the LED display?  Why not just 

  connect this to +12v and use the front panel feature to control 

  brightness?  If I do hook this up to a dimmer, how much power does it 

  draw?  I can't find any reference to power consumption in the specs.

  

  Thanks,

  --

  Tom Sargent, RV-6A

============================
	


Tom:



The purpose of hooking up the KT-76C to the panel light dimmer is ONLY to 

have the entire panel light system TURNED ON & OFF from one common point.  Once 

it is On then you can adjust the light intensity on the Xponder as you wish.  

The only part you or the instructions did not mention is WHERE on the dimmer do 

you tap off the power?  You do want ON & OFF control of the panel lighting 

BUT as you guessed, if the power tap off is on the adjusted output then if the 

panel lights are DIM the Xponder lights may be nonexistent.  All you really 

need is common ON - OFF control of the lights for the Xponder.



Barry

"Chop'd Liver"

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