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mprather(at)spro.net Guest
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Posted: Sat May 03, 2008 12:52 pm Post subject: KY-97 Power Pins |
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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
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Posted: Sat May 03, 2008 9:15 pm Post subject: KY-97 Power Pins |
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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-
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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
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Posted: Sun May 04, 2008 4:35 pm Post subject: KY-97 Power Pins |
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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 . . .
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