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  #1  
Old 03-11-2018, 07:14 AM
dcatt dcatt is offline
 
Join Date: Feb 2017
Location: Banbury, UK
Posts: 2
Default Stall Warning Audio Board

Hi, I am installing the panel and wiring in my QB RV8 and am embarrassed to say that I don't understand what the ES Audio board supplied in the stall warning kit is for? Clearly I am missing something quite fundamental here but I would have thought some kind of buzzer connected directly to the stall switch in the wing would do the job without any need for the board. This is my first post but I love this forum and have used it extensively during what is now 3 years of building with a while to go yet. Thanks Dave
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Old 03-11-2018, 07:26 AM
Ron B. Ron B. is offline
 
Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
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I do not have mine working properly so hopefully some one else will chime in with the correct info. I think it's in order to connect the stall warning to your intercom. Mine only sounds with the buzzer and I only hear it with the engine at low RPM. I have it wired to the intercom but something is a miss as I do not hear it in the headphones. Hopefully some one will have help for me also.
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Old 03-11-2018, 02:19 PM
dcatt dcatt is offline
 
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Location: Banbury, UK
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Thanks Ron, I did wonder if it was something to do with the intercom
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  #4  
Old 03-11-2018, 02:55 PM
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RV6_flyer RV6_flyer is offline
 
Join Date: Jan 2005
Location: NC25
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From what I read when I installed the switch, the board is a Tone or Sound generator that ties into the headphone jack and or intercom.
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  #5  
Old 03-12-2018, 08:33 AM
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agirard7a agirard7a is offline
 
Join Date: Aug 2009
Location: Newport, RI
Posts: 638
Default Head phone jack

I wired mine into the headphone jack. It was very loud so I installed a resistor to tone it down a bit. I ended up removing the tone generator and installing a red light on the panel. Very easy to wire up. One lead to positive and the stall warn contact is connected to the negative lead.

I am concidering re-hooking up the tone as I think it is a more effective indicator.
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Old 03-12-2018, 08:58 AM
RV7ator RV7ator is offline
 
Join Date: Jan 2005
Location: Boise, ID
Posts: 962
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It's a tone generator that doesn't ramp up. Suddenly it's ON! BLATT! enough to scare the pucky out of any passenger just as you flare. Throw it away and pay attention to your AS/AOA.

John Siebold
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  #7  
Old 03-12-2018, 01:57 PM
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agirard7a agirard7a is offline
 
Join Date: Aug 2009
Location: Newport, RI
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Quote:
Originally Posted by RV7ator View Post
It's a tone generator that doesn't ramp up. Suddenly it's ON! BLATT! enough to scare the pucky out of any passenger just as you flare. Throw it away and pay attention to your AS/AOA.

John Siebold
Diagree. Wire it into the headset jack not the intercom. Your passenger wonít here it. Tone it down with a resistor. Itís a nice safety feature if you ask me.
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Old 03-25-2018, 03:58 PM
SgtZim SgtZim is offline
 
Join Date: May 2015
Location: Crittenden, ky
Posts: 186
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I think mounting the board inside keeps it in a more stable / dry environment. I wired mine into a GMA245 audio panel and also had to tone it down with a resistor. I had also briefly considered leaving it out since the Garmin G3X system has a nice AOA and stall warning setup with plenty of customization options, but thought better of it for two reasons. The Van's stall warn doesn't draw any current so you can wire it into a hot bus or essential bus (in my case) so that some day down the road when the excrement has hit the fan and you have to shut down much of your electrical systems including the G3X and you're really focused on a partial panel approach somewhere, you still have a warning if airspeed drops out of your crosscheck. The other reason is for the next guy to fly the plane. I'd like him/her to have another help to avoid the low altitude stall that still gets a lot of folks.
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Last edited by SgtZim : 03-25-2018 at 03:59 PM. Reason: a
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Old 03-25-2018, 05:55 PM
moosepileit moosepileit is offline
 
Join Date: Dec 2010
Location: Floyds Knobs, IN
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Mine works but is about 50% too loud. Can anyone suggest a resistor value and location? My board is behind my instrument panel.
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  #10  
Old 03-26-2018, 07:31 AM
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agirard7a agirard7a is offline
 
Join Date: Aug 2009
Location: Newport, RI
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Default Resistor

Quote:
Originally Posted by moosepileit View Post
Mine works but is about 50% too loud. Can anyone suggest a resistor value and location? My board is behind my instrument panel.
Canít remember the resistor value that I used. I located it close to the headset jack. Try different ones to find the one that works best. If you have it wired into the intercom, you will have to locate the signal output wire coming out of the sound board.
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