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GTX337 ON or OFF?

 
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bakerocb



Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

PostPosted: Fri Jan 01, 2010 11:49 am    Post subject: GTX337 ON or OFF? Reply with quote

1/1/2010

Hello Allen Fullmer, You wrote:

"........skip.....I have also noticed that the GTX337 transponder cannot be
set to remain off when power is supplied. It will remain in the standby
position but, once again, when I am playing and fiddling around I just hate
to see it go up and down unnecessarily. Haven't decided on a switch for it
or not."

I also can not program my GTX327 to remain OFF when power is applied or
reapplied to the avionics buss.** But the GTX327 has some options on which
pins electrical power can be supplied to. If you pick the correct pin(s) the
box will remain OFF until you push the ON button on the face of the box.

I suspect that the GTX337 may be built the same way. So if you desire, and
have the capability, you could rewire your GTX337 so that it would remain
OFF until you pushed the ON button on the face of the box.

'OC' Says: "The best investment we can make is the effort to gather and
understand knowledge."

**PS: I suspect that the person who wired my panel set it up that way so
that it would take a very deliberate OFF button action on my part in order
to take off with the transponder OFF. I am with you, I'd like to have total
ON - OFF control of the box with the buttons on the face of the box.


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sarg314(at)gmail.com
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PostPosted: Mon Jan 04, 2010 7:03 pm    Post subject: GTX337 ON or OFF? Reply with quote

The GTX-327 in my plane has the same undesirable behavior. I called Garmin who said it was due to harness wiring and I should call Stark Avionics, who I bought the thing from.  John Stark says they wire the connector assuming there is going to be an avionics master switch, which he strongly recommends.  I am convinced by Bob K. that the avionics master is not necessary.  John tells me that the fix (which I haven't tried yet) is to cut the wire to pin 1 on the connector and cover up the loose wire with heat shrink or something so it won't short to anything.

I wish I'd known this when the thing was easier to get at.  It's fully installed now.  Sigh.

On Fri, Jan 1, 2010 at 12:22 PM, <bakerocb(at)cox.net (bakerocb(at)cox.net)> wrote:
Quote:
--> AeroElectric-List message posted by: <bakerocb(at)cox.net (bakerocb(at)cox.net)>

1/1/2010

Hello Allen Fullmer, You wrote:

"........skip.....I have also noticed that the GTX337 transponder cannot be set to remain off when power is supplied.  It will remain in the standby position but, once again, when I am playing and fiddling around I just hate to see it go up and down unnecessarily.  Haven't decided on a switch for it or not."

I also can not program my GTX327 to remain OFF when power is applied or reapplied to the avionics buss.** But the GTX327 has some options on which pins electrical power can be supplied to. If you pick the correct pin(s) the box will remain OFF until you push the ON button on the face of the box.

I suspect that the GTX337 may be built the same way. So if you desire, and have the capability, you could rewire your GTX337 so that it would remain OFF until you pushed the ON button on the face of the box.

'OC' Says: "The best investment we can make is the effort to gather and understand knowledge."

**PS: I suspect that the person who wired my panel set it up that way so that it would take a very deliberate OFF button action on my part in order to take off with the transponder OFF. I am with you, I'd like to have total ON - OFF control of the box with the buttons on the face of the box.



--
Tom Sargent
[quote][b]


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