SkyBound Posted August 31, 2015 Report Posted August 31, 2015 I recently discovered that my stall warning and gear warning both sound the same on my 1979 M20K 231. On my previously owned M20C the gear warning would sound as a short "beep beep beep beep" and stall warning as a constant "beeeeeeeep". In my K both sound as a constant "beep". Could other M20K owners confirm if that's an issue with my airplane or are the two sounds the same and everything is working as designed? Thanks in advance. --Alex Quote
Jeff H. Posted August 31, 2015 Report Posted August 31, 2015 '81 M20K 231 - the "B!tch!n Betty" and Stall Warning are distinct sounds and will not be confused. Stall warning as constant high tone, gear warning as more buzzing sound, lower tone. Quote
Seth Posted August 31, 2015 Report Posted August 31, 2015 Alex - install an audio gear warning with the lady telling you to put the gear down! My two sounds are different in my 1983, and I have not yet installed the lady yelling in my ear. -Seth Quote
chrisk Posted August 31, 2015 Report Posted August 31, 2015 My '81 231 had the same sounds until the sonalert was replaced. As I recall there are 3 of them located on the ceiling above your right shoulder. In airplane terms, they were not much money. The replacement started because the stall warning became intermittent. I assume the gear warning part was aged out too. I believe the part numbers were SC628 for the stall warning. SC628PR for the gear. Less than $50 for both including shipping from Alied Electronics http://www.alliedelec.com/mallory-sonalert-sc628pr/70186622/ http://www.alliedelec.com/mallory-sonalert-sc628/70186814/ Quote
SkyBound Posted August 31, 2015 Author Report Posted August 31, 2015 Thanks for the quick responses! Seth - where do I find the lady? Is it just a replacement sonalert that has voice instead of a beeping sound? Quote
SkyBound Posted August 31, 2015 Author Report Posted August 31, 2015 I think I found the Voice Alert - is this the right part? http://www.aircraftspruce.com/catalog/avpages/voicegearalert.php I believe the one I need is Part # 10-00394 - VOICE ALERT 2040-1-2 produces stall and gear voice messages in the pilot's headset. Supplemental system only. Quote
Houman Posted August 31, 2015 Report Posted August 31, 2015 I recently discovered that my stall warning and gear warning both sound the same on my 1979 M20K 231. On my previously owned M20C the gear warning would sound as a short "beep beep beep beep" and stall warning as a constant "beeeeeeeep". In my K both sound as a constant "beep". Could other M20K owners confirm if that's an issue with my airplane or are the two sounds the same and everything is working as designed? Thanks in advance. --Alex I have a 1979 M20K and I think they sound different, weill I think, I will listen more carefully on next flight... Quote
kortopates Posted August 31, 2015 Report Posted August 31, 2015 They should sound differently and all models use the same two: Stall - continuous tone from Sonalert SC628 Gear - pulsating tone from Sonalert SC628P (P stands for pulsating) The King autopilots add another SC628 for the autopilot they are listed in your IPC Quote
SkyBound Posted August 31, 2015 Author Report Posted August 31, 2015 Thank you Kortopates - I will confirm that I have the right Sonalerts and the wiring. I have a Century 41 autopilot. Quote
Piloto Posted September 2, 2015 Report Posted September 2, 2015 Even if the alarms sound different you will not know which is which when they come up. That is why I installed the Voice Alert alarm. Turning into final on base leg either one can come up and you may end up not extending the gear thinking it was the stall alarm. That is why I installed the Voice Alert. Well worth it José Quote
SkyBound Posted September 2, 2015 Author Report Posted September 2, 2015 Jose, I could not agree with you more, the Voice Alert is definitely worth while. Could you provide me with more information on the part number and how you went about getting it installed? Were there any lessons learned that you could share? Thank you. --Alex Quote
DonMuncy Posted September 2, 2015 Report Posted September 2, 2015 Alex, My Voice Alert is p/n 2040. Got it from Aircraft Components Inc. About $500. Installation was not too bad, as it ties into and is activated by the existing stall warning system and gear warning system. It is great, as that voice saying "stall" or "check landing gear" can't be misunderstood. 1 Quote
Houman Posted September 2, 2015 Report Posted September 2, 2015 Are they installed instead of the speakers, if it would just be that it would be amazing... if not, may I ask how much was the installation ??? Quote
DonMuncy Posted September 2, 2015 Report Posted September 2, 2015 To be truthful, I don't know whether the horns are disconnected or not. Perhaps the Voice Alert just overrides the horn. but with my ANR headset I never hear the horns. But in essence, the power that used to go to the horn now goes to the VA box which turns on the voice. My avionics guru did some more stuff at the time of the installation, but I think the VA installation was about $650. Quote
Jack Burson Posted September 2, 2015 Report Posted September 2, 2015 Try this one: Electronics International AV-17. Quote
kortopates Posted September 5, 2015 Report Posted September 5, 2015 I much prefer the P2 Audio Advisory system. Google it and check it out. It is plumbed into your pitot system as well as stall and gear warning systems and is much more helpful in that it will give you a voice alert at Vref+10. Sent from my iPhone using Tapatalk Quote
Piloto Posted September 6, 2015 Report Posted September 6, 2015 My Voice Alert audio is connected to the un-switch input (pin T) of the KMA-24. This way I get the voice warnings in the headphones and on the speaker irrelevant of the KMA-24 switches position. BTW a week ago we tested an IFD-540 from a friend in my M20J. Just slide the IFD-540 into the 530 tray and it worked very well, it even showed traffic from the ATD-300. My friend had some problems with it on his M20K and though it was the 540, but we flight tested all the functions and it works just like the 530. To my surprise the IFD540 gives voice warnings when approaching airspaces and terrain. The female voice had some Asian accent. We concluded that there were some problems with his installation and not with the unit. José Quote
SkyBound Posted September 19, 2015 Author Report Posted September 19, 2015 Many thanks to everyone who posted and responded. I have replaced both of my Sonalerts (special thanks to ChrisK and Paul K for the links and the part numbers - they matched what I had installed). I performed a gear swing with the aircraft raised and the gear alert and stall warning sounded differently as designed. Thus far the stall warning sound has also been consistent. I am looking into getting the Voice Alert audio installed and will update the group on my experience. --Alex Quote
carusoam Posted September 19, 2015 Report Posted September 19, 2015 Great follow-up, Alex! best regards, -a- 1 Quote
swierchris Posted August 1, 2019 Report Posted August 1, 2019 I have been looking at the Voice Alert 2040-1-1-P combined with a JPI-930 Engine Monitor because one can have additional voice alarms beyond gear and stall. I think it would be nice to have the following audio alarms to help prevent issues. Under-voltage CHT overtemp Oil Pressure low Fuel Level Low Fuel Pressure Low Gear Up Stall Quote
carusoam Posted August 2, 2019 Report Posted August 2, 2019 Welcome aboard Chris. Best regards, -a- Quote
KB4 Posted August 2, 2019 Report Posted August 2, 2019 On 8/31/2015 at 12:48 PM, SkyBound said: I think I found the Voice Alert - is this the right part? http://www.aircraftspruce.com/catalog/avpages/voicegearalert.php I believe the one I need is Part # 10-00394 - VOICE ALERT 2040-1-2 produces stall and gear voice messages in the pilot's headset. Supplemental system only. I also had this installed. This Bitchin Betty is awesome-- Check gear check gear check gear. No mistaking the sound and install was around 800. Quote
PT20J Posted August 3, 2019 Report Posted August 3, 2019 On 8/31/2015 at 2:37 PM, kortopates said: They should sound differently and all models use the same two: Stall - continuous tone from Sonalert SC628 Gear - pulsating tone from Sonalert SC628P (P stands for pulsating) The King autopilots add another SC628 for the autopilot they are listed in your IPC My ‘94 J has an electronic tone generator and an overhead speaker for gear and stall warning. The only sonalert is for the autopilot disconnect. Skip 2 Quote
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