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mark.bitterlich(at)navy.m
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 Posted: Tue Sep 12, 2017 10:28 am Post subject: [Non-DoD Source] Re: Baklan won't transmit |
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It's a good thought Rico, but if you read his posting carefully, you'll notice he said his Intercom was working perfectly. If the ICS is working with good microphone audio, it is not the headset or the plugs, sockets, etc. I've held off commenting on his predicament because troubleshooting it is not that easy unless you have some sort of equipment. That said, I'll give it a shot.
First, be darn sure it has good carrier output ... it would be nice to connect a watt-meter to it and actually check power output.
The easiest next step is to borrow a radio from another owner (YAK-52's use the same radio) plug it in and see if it fixes the problem. The issue is if that is not possible. There are many ways to figure out if microphone audio is getting to the radio itself. These run the gamut from Oscilloscopes, to low level audio meters, etc. Obviously the goal here is to verify that mike audio is getting to the radio itself properly. That is the logic tree split ... wiring/parts going to the radio, or the radio itself. The problem deals with how much training you have had, and your ability to use the tools.
With that in mind, if you can't get your hands on a borrowed radio R/T itself, take a look at the link below. This telephone troubleshooting tool includes an inductive pickup probe with speaker. There are different brand names for this tool, and last time I checked even Lowe's had them available.
https://www.amazon.com/Extech-40180-Generator-Amplifier-Circuit/dp/B00023RVNO
And much much cheaper on EBay:
https://www.ebay.com/p/Progressive-Tempo-200EP-Inductive-Amplifier-77hp-Probe-Kit/1107588415
This tool allows you to just stick the probe near the wire itself. You can stick it into the back shell of a cannon plug where the pins go (carefully) and listen to actual audio that is being carried through the wire. Yes, it gets much louder if you actually touch the metal of the pin itself, but just getting close to it will work. The other half of this device is a tone GENERATOR. It puts audio INTO a wire so that you can then check it with the Inductive Pickup Probe!
Besides checking for mike audio, this tool set has many other very powerful uses. If you put a tone into a wire that is in a bundle, you can pull the wires apart further down in the airplane and FIND that exact wire, without cutting and dicing. This was exactly the intent of the design, and although it was meant for telephone cable pairs, it works on ANY wire for ANY purpose and will accomplish the goal here with very little training.
Mark
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rocknpilot(at)hotmail.com
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| Posted: Tue Sep 12, 2017 10:42 am Post subject: [Non-DoD Source] Re: Baklan won't transmit |
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Great point, Mark. Well, that's what you get when a music teacher ventures out of his (narrow) area of expertise! :-/
Rico Jaeger
915 S. 11th Ave.
Wausau, WI. 54401
715.529.7426
//
1969 Cessna 150J ^/---//-X
N61333 // Hangar #35 / AUW
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //
Hangar #21 / AUW
From: owner-yak-list-server(at)matronics.com <owner-yak-list-server(at)matronics.com> on behalf of Bitterlich, Mark G CIV NAVAIR, WD <mark.bitterlich(at)navy.mil>
Sent: Tuesday, September 12, 2017 1:27:23 PM
To: yak-list(at)matronics.com
Subject: RE: [Non-DoD Source] Re: Baklan won't transmit
--> Yak-List message posted by: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich(at)navy.mil>
It's a good thought Rico, but if you read his posting carefully, you'll notice he said his Intercom was working perfectly. If the ICS is working with good microphone audio, it is not the headset or the plugs, sockets, etc. I've held off commenting on his predicament because troubleshooting it is not that easy unless you have some sort of equipment. That said, I'll give it a shot.
First, be darn sure it has good carrier output ... it would be nice to connect a watt-meter to it and actually check power output.
The easiest next step is to borrow a radio from another owner (YAK-52's use the same radio) plug it in and see if it fixes the problem. The issue is if that is not possible. There are many ways to figure out if microphone audio is getting to the radio itself. These run the gamut from Oscilloscopes, to low level audio meters, etc. Obviously the goal here is to verify that mike audio is getting to the radio itself properly. That is the logic tree split ... wiring/parts going to the radio, or the radio itself. The problem deals with how much training you have had, and your ability to use the tools.
With that in mind, if you can't get your hands on a borrowed radio R/T itself, take a look at the link below. This telephone troubleshooting tool includes an inductive pickup probe with speaker. There are different brand names for this tool, and last time I checked even Lowe's had them available.
https://www.amazon.com/Extech-40180-Generator-Amplifier-Circuit/dp/B00023RVNO
And much much cheaper on EBay:
https://www.ebay.com/p/Progressive-Tempo-200EP-Inductive-Amplifier-77hp-Probe-Kit/1107588415
This tool allows you to just stick the probe near the wire itself. You can stick it into the back shell of a cannon plug where the pins go (carefully) and listen to actual audio that is being carried through the wire. Yes, it gets much louder if you actually touch the metal of the pin itself, but just getting close to it will work. The other half of this device is a tone GENERATOR. It puts audio INTO a wire so that you can then check it with the Inductive Pickup Probe!
Besides checking for mike audio, this tool set has many other very powerful uses. If you put a tone into a wire that is in a bundle, you can pull the wires apart further down in the airplane and FIND that exact wire, without cutting and dicing. This was exactly the intent of the design, and although it was meant for telephone cable pairs, it works on ANY wire for ANY purpose and will accomplish the goal here with very little training.
Mark
--
| | - The Matronics Yak-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?Yak-List |
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mark.bitterlich(at)navy.m
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| Posted: Wed Sep 13, 2017 8:13 am Post subject: [Non-DoD Source] RE: Baklan won't transmit |
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If he has carrier output, then his PTT button is working.
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| | - The Matronics Yak-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?Yak-List |
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