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KY-97a

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aldaniels(at)fmtcblue.com
Guest

Posted: Sat Apr 29, 2006 11:23 am Post subject: KY-97a

I have a KY-97a installed in my Fox. It has been working great, but 

today it was stuck on TX. Not solid to start with, just flickering and 

then off and them on full all the time. I thought it was a bad mic 

button so wanting to fly I cut one of the wires and was just going to 

use the passenger side PTT, but it made no difference. I pulled the seat 

and undid a connection and it made no difference. I could not find 

anything wrong with the wire and it indicated 0 ohms with the power off, 

and 5.45 volts with the power on. Any ideas. Bad radio.



Thanks



Alan

 	  Quote:

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smokey_bear_40220(at)yaho
Guest

Posted: Sat Apr 29, 2006 3:11 pm Post subject: KY-97a

Hi Alan,



Did you install it and do you have the wiring diagram?



Not sure on that model, but the TX switch is usually

grounded thru your TX buttons to cause the radio to

transmit.  If so, it should have the wire running from

the radio to your TX buttons and then to a ground.



With the switches not activated and the radio off, it

should have some resistance at the point it comes out

of the radio to the TX switches.



Second thing to check is to disconnect the wire to

your transmit buttons right at the radio and see if it

stops transmitting when turned on.  Also check the

resistance between that wire to the buttons and

ground.  It should show open and not shorted to

ground.  Both checks are for a grounded TX wire.



If it still TXs with this wire disconnected, it is

most likely in the radio.  Bad do do and $ to repair

uness you have a friend or someone else here knows

what they are doing with it.



Of course if your radio is not triggered by "pulling

to ground" then you need to get into that diagram to

go further anyway.



Kurt S.  S-5



--- Alan Daniels <aldaniels(at)fmtcblue.com> wrote:



 	  Quote: 	
		   I have a KY-97a installed in my Fox. It has been

 working great, but 

 today it was stuck on TX. Not solid to start with,

 just flickering and 

 then off and them on full all the time. I thought it

 was a bad mic 

 button so wanting to fly I cut one of the wires and

 was just going to 

 use the passenger side PTT, but it made no

 difference. I pulled the seat 

 and undid a connection and it made no difference. I

 could not find 

 anything wrong with the wire and it indicated 0 ohms

 with the power off, 

 and 5.45 volts with the power on. Any ideas. Bad

 radio.

 

 Thanks

 

 Alan


	


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aldaniels(at)fmtcblue.com
Guest

Posted: Sat Apr 29, 2006 4:44 pm Post subject: KY-97a

It is a ground to TX with a PTT to each stick.  With the wires 

disconnected it is still on TX. The pilot button has no effect, but the 

co-pilot side clicks when pushed which leads me to believe that it is in 

the radio, but as with all things like this there is someone that knows 

more than me. It is almost new but out of warranty due to shop time. I 

will call the avionics shop on Monday to see what they say, but their 

solution will be expensive.

Thanks Kurt.

Alan

kurt schrader wrote:

 	  Quote: 	

 Hi Alan,

 Did you install it and do you have the wiring diagram?

 Not sure on that model, but the TX switch is usually

 grounded thru your TX buttons to cause the radio to

 transmit.  If so, it should have the wire running from

 the radio to your TX buttons and then to a ground.

 With the switches not activated and the radio off, it

 should have some resistance at the point it comes out

 of the radio to the TX switches.

 Second thing to check is to disconnect the wire to

 your transmit buttons right at the radio and see if it

 stops transmitting when turned on.  Also check the

 resistance between that wire to the buttons and

 ground.  It should show open and not shorted to

 ground.  Both checks are for a grounded TX wire.

 If it still TXs with this wire disconnected, it is

 most likely in the radio.  Bad do do and $ to repair

 uness you have a friend or someone else here knows

 what they are doing with it.

 Of course if your radio is not triggered by "pulling

 to ground" then you need to get into that diagram to

 go further anyway.

 Kurt S.  S-5

 --- Alan Daniels <aldaniels(at)fmtcblue.com> wrote:

> I have a KY-97a installed in my Fox. It has been

> working great, but 

> today it was stuck on TX. Not solid to start with,

> just flickering and 

> then off and them on full all the time. I thought it

> was a bad mic 

> button so wanting to fly I cut one of the wires and

> was just going to 

> use the passenger side PTT, but it made no

> difference. I pulled the seat 

> and undid a connection and it made no difference. I

> could not find 

> anything wrong with the wire and it indicated 0 ohms

> with the power off, 

> and 5.45 volts with the power on. Any ideas. Bad

> radio.

>

> Thanks

>

> Alan

>     

 __________________________________________________

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 Tired of spam?  Yahoo! Mail has the best spam protection around 

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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:

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avidsid(at)yahoo.com
Guest

Posted: Sat Apr 29, 2006 5:56 pm Post subject: KY-97a

aeroelectric site has the schematic is that might help chase down a shorted or bare wire...........not complicated.

  Sid

  ---------------

Alan Daniels <aldaniels(at)fmtcblue.com> wrote:

It is a ground to TX with a PTT to each stick. With the wires 

disconnected it is still on TX. The pilot button has no effect, but the 

co-pilot side clicks when pushed which leads me to believe that it is in 

the radio, but as with all things like this there is someone that knows 

more than me. It is almost new but out of warranty due to shop time. I 

will call the avionics shop on Monday to see what they say, but their 

solution will be expensive.

Thanks Kurt.

Alan

kurt schrader wrote:

 	  Quote: 	

 Hi Alan,

 Did you install it and do you have the wiring diagram?

 Not sure on that model, but the TX switch is usually

 grounded thru your TX buttons to cause the radio to

 transmit. If so, it should have the wire running from

 the radio to your TX buttons and then to a ground.

 With the switches not activated and the radio off, it

 should have some resistance at the point it comes out

 of the radio to the TX switches.

 Second thing to check is to disconnect the wire to

 your transmit buttons right at the radio and see if it

 stops transmitting when turned on. Also check the

 resistance between that wire to the buttons and

 ground. It should show open and not shorted to

 ground. Both checks are for a grounded TX wire.

 If it still TXs with this wire disconnected, it is

 most likely in the radio. Bad do do and $ to repair

 uness you have a friend or someone else here knows

 what they are doing with it.

 Of course if your radio is not triggered by "pulling

 to ground" then you need to get into that diagram to

 go further anyway.

 Kurt S. S-5

 --- Alan Daniels wrote:

> I have a KY-97a installed in my Fox. It has been

> working great, but 

> today it was stuck on TX. Not solid to start with,

> just flickering and 

> then off and them on full all the time. I thought it

> was a bad mic 

> button so wanting to fly I cut one of the wires and

> was just going to 

> use the passenger side PTT, but it made no

> difference. I pulled the seat 

> and undid a connection and it made no difference. I

> could not find 

> anything wrong with the wire and it indicated 0 ohms

> with the power off, 

> and 5.45 volts with the power on. Any ideas. Bad

> radio.

>

> Thanks

>

> Alan

> 

 __________________________________________________

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Jim Shumaker

Joined: 09 Jan 2006
Posts: 106

Posted: Sat Apr 29, 2006 9:38 pm Post subject: KY-97a

Alan

   

  The 5.45 volts...is that the voltage into the radio?  If the voltage into the radio is too low you will get all sorts of strange symptoms.  Like it may say transmit when it is not.  That would mean a loose power connection.

   

  Jim Shumaker



Alan Daniels <aldaniels(at)fmtcblue.com> wrote:

  



I have a KY-97a installed in my Fox. It has been working great, but 

today it was stuck on TX. Not solid to start with, just flickering and 

then off and them on full all the time. I thought it was a bad mic 

button so wanting to fly I cut one of the wires and was just going to 

use the passenger side PTT, but it made no difference. I pulled the seat 

and undid a connection and it made no difference. I could not find 

anything wrong with the wire and it indicated 0 ohms with the power off, 

and 5.45 volts with the power on. Any ideas. Bad radio.



Thanks



Alan

 	  Quote:

- The Matronics Kitfox-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?Kitfox-List

_________________
Jim Shumaker

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