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KY-97 Power Pins

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mprather(at)spro.net
Guest

Posted: Sat May 03, 2008 12:52 pm Post subject: KY-97 Power Pins

Hey group,



I am helping to install a King Ky-97 comm into a friend's airplane and

have a question about wiring the power pins.  The manual lists "SWITCHED

A/C POWER", "13.75 A/C POWER" along with "13.75V POWER".  Does anyone know

how these pin groups differ in function?  Would it be safe to connect them

all together?

Regards,



Matt-

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nuckolls.bob(at)cox.net
Guest

Posted: Sat May 03, 2008 9:15 pm Post subject: KY-97 Power Pins

At 02:49 PM 5/3/2008 -0600, you wrote:



 	  Quote: 	
		  



Hey group,



I am helping to install a King Ky-97 comm into a friend's airplane and

have a question about wiring the power pins.  The manual lists "SWITCHED

A/C POWER", "13.75 A/C POWER" along with "13.75V POWER".  Does anyone know

how these pin groups differ in function?  Would it be safe to connect them

all together?

Regards,



Matt-


	


   If I read the data at:



http://www.aeroelectric.com/Installation_Data/KY97A.pdf



   correctly, pins 14 and "R" are the ship's power input

   from the bus.



   Pins 11, 13, "M" and "P" according to Note 4 all get

   tied together. If we had a schematic of the radio, I

   think we would find that two of the four cited above

   are switched power FROM the bus and two others are

   power INTO the transponder's electronics. This pair

   of pathways are brought out downstream of the transponder

   power switch to allow you a switched source of power for

   the encoder.

   Bob . . .

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mprather(at)spro.net
Guest

Posted: Sun May 04, 2008 4:35 pm Post subject: KY-97 Power Pins

Thanks for the input Bob.  They KY-97 is a comm radio however.



I wired the unit according to the manual (a copy of which Bill posted),

and it seems to power up okay - no antenna hooked up so haven't tried

transmitting/receiving yet.  I had speculated that the loop put an

internal regulator in the correct mode, but still not sure.

Regards,



Matt-

 	  Quote: 	
		   

 <nuckolls.bob(at)cox.net>



 At 02:49 PM 5/3/2008 -0600, you wrote:



>

> <mprather(at)spro.net>

>

>Hey group,

>

>I am helping to install a King Ky-97 comm into a friend's airplane and

>have a question about wiring the power pins.  The manual lists "SWITCHED

>A/C POWER", "13.75 A/C POWER" along with "13.75V POWER".  Does anyone

> know

>how these pin groups differ in function?  Would it be safe to connect

> them

>all together?

>Regards,

>

>Matt-



    If I read the data at:



 http://www.aeroelectric.com/Installation_Data/KY97A.pdf



    correctly, pins 14 and "R" are the ship's power input

    from the bus.



    Pins 11, 13, "M" and "P" according to Note 4 all get

    tied together. If we had a schematic of the radio, I

    think we would find that two of the four cited above

    are switched power FROM the bus and two others are

    power INTO the transponder's electronics. This pair

    of pathways are brought out downstream of the transponder

    power switch to allow you a switched source of power for

    the encoder.

    Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

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