Stall warner problem

[echoooo]

Hi all.

I have bought a Stall warner 7/8/9 from Van?s on my RV-7. For a reason I ignore, it don?t work! I am sure it?s a simple issue, but cannot figure it.

I have connected the wires coming from the the wire connector of the stall warning plate as following:
- Left one: to a 2A breaker;
- Second from left: to ground;
- Thirdth from left : to the micro-switch;
- Right one : directly to one wire of the earphone jack of my headset as mentioned in the ordering information:

?Description
Kit allows simple installation, either to retrofit flying RVs, or during initial wing construction. Simple vane type stall warning device as installed on Van's demo airplanes. Includes a tone generator that can be connected directly to headset jacks for audible stall warning.?

When I trigger the vane, I hear a click out of the stall warning plate, but nothing in my headset.

The figure 2 of page OP46-06-RV-7,8,9, 08/06/09 of the installation sheet says to connect the right wire to the ?Audio mixer/Audio input?.

I suppose my problem is there? Do I have to connect this 4th wire elsewere?

Alain

[rv7charlie]

Can you publish a link to the manual/schematic?

[wirejock]

The fourth need to go to the input on your audio system. The headset can't amplify the low signal. My guess. YMMV

[rvbuilder2002]

Originally Posted by echoooo

I have connected the wires coming from the the wire connector of the stall warning plate as following:
- Left one: to a 2A breaker;
- Second from left: to ground;
- Thirdth from left : to the micro-switch;
- Right one : directly to one wire of the earphone jack of my headset as mentioned in the ordering information:

Use a temporary test wire and connect the third wire connection to ground and see if it works.
If it does, check to make sure you have a wire connecting the common terminal of the stall sensor switch to ground. The tone activates when the activation wire becomes connected to ground.

[Taildrgr]

Mine is wired to my audio panel.
However, when I finished my wiring and tested it, it did not work.
I bypassed the stall switch and wired the contact to ground and it still did not work.
I ordered a new circuit board and now it works.
Apparently, I received a bad board in the kit.

The board is not listed separately on their online store, but I gave the part number from the drawing and was able to purchase one for $45.

Note that the warning sound is painfully loud. Luckily I wired it to an adjustable input on my audio panel. There is a thread here on VAF that discussed adding a resistor or pot to the circuit to control the sound level.

[echoooo]

« The fourth need to go to the input on your audio system. The headset can't amplify the low signal. My guess. YMMV »

I think you could be right, but why Van’s site announces that one can connect the tone generator directly to the headset jacks?

http://www.vansaircraft.com/cgi-bin/...t=stall-warner

“Use a temporary test wire and connect the third wire connection to ground and see if it works.
If it does, check to make sure you have a wire connecting the common terminal of the stall sensor switch to ground. The tone activates when the activation wire becomes connected to ground.”

I have checked the continuity of the wire that connects the sensor switch to the tone generator and it was correct. And when I trigger the sensor vane, I hear a click out of the stall warning plate, but nothing in my headset. So I think the problem is not with the ground of that sensor switch, or with the sensor switch itself, or with the wire that connect it to the tone generator.

I have also bypassed the sensor switch of the vane with a jumper wire that I connected directly from ground to the «sensor» connection on the tone generator and heard a click out of the stall warning plate, but still nothing in my headset.

I have connected the other end of the wire that is connected to the «Audio mixer/Audio input» connection on the tone generator, to each spring blades of the earphone’s jack, one after the other, and still no sound in my headset. I did same with the spring blades of the micro’s jack without any result.

Unless Van is wrong when it says that I can connect the tone generator directly to the headset jacks, I think that, as taildrgr wrote, the problem is with the tone generator itself.

Before I order a new tone generator, could you tell me were I should connect the «Audio mixer/Audio input» wire of the tone generator to make a last test? I have no audio mixer. The only radio I have is a Garmin SL40.

Thanks for your help. Alain