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  #151  
Old 05-11-2010, 12:11 PM
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DCat22 DCat22 is offline
 
Join Date: May 2009
Location: Houston, TX
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Quote:
Originally Posted by N999ZA View Post
Hey Rick,

Any change you've done any experimentation with adding bias voltage to your planetronics setup?

I've got my headset in hand and I'm ready to start in on the project, but don't want to build a headset that doesn't work well with the intercom.
Welll... I actually haven't been flying in months. Chasing getting back up for the last month, but the weather and I have been having a spat.

In theory, I'll be able to try again this Saturday... (Or more likely, the flight after that...as this is an FBO checkout/currency trip.)

I'll update if/when I turn up anything though. Despite the limitations, I've just dealt with them a number of times, as I really like the form factor. I wouldn't advise doing that -- but I think it's worth pursuing, so I haven't forgotten about it or given up.
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  #152  
Old 05-31-2010, 08:34 AM
chrisvt chrisvt is offline
 
Join Date: May 2010
Location: Montpelier, Vermont
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Hoping someone can help me with a wiring question. I don't fly but am helping my uncle with this headset project for his plane, so bear with me...

We're designing this for a passenger headset and the microphone isn't working for pilot/passenger communications. When I soldered the .206 connector, I soldered wires to the tip, ring and sleeve. As I've learned on this forum, the tip is for the push to transmit feature. There is a push to transmit feature on the plane, but for communications between the pilot and passenger, the mics are voice activated.

Should I de-solder that tip wire and only use the ring and sleeve connections? I'm guessing that by soldering the tip connection, the circuit was opened and can only be closed by the push to transmit button? Because inner-plane communications don't use push to transmit, the circuit does not close and the mic does not work?

Thanks.

Last edited by chrisvt : 05-31-2010 at 10:33 AM.
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  #153  
Old 06-01-2010, 09:14 AM
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pmccoy pmccoy is offline
 
Join Date: Jan 2006
Location: Orange County CA
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Quote:
Should I de-solder that tip wire and only use the ring and sleeve connections?
Yes. Do not run a wire to the Tip. Just use the middle ring and ground sleeve.
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  #154  
Old 06-18-2010, 07:51 PM
rkantor rkantor is offline
 
Join Date: Jun 2010
Location: Bunn, NC
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I have been researching on making an in ear headset for my wife. I come across this thread. A lot of great info. I have the plaintronics headset mentioned and a Sony ANR in ear. I also purchased the Comply tips that fit both. My plan was to get the small project box and put in the 1/8 in panel mount jacks and hardwire the .206 and 1/4 in plugs in the box terminated to plug into the plane. I found the parts even cheaper at allelectronics.com as far as the .206 plugs.
2 SWC-S267 (3/16� (0.206�) PHONE PLUG, 3-CONDUCTOR - (SWC-S267)) $4.00 $8.00
I was wondering about the bias voltage specifically, how does that part of the system work?

Thanks
Rick
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  #155  
Old 06-20-2010, 05:20 PM
docsalvage docsalvage is offline
 
Join Date: Nov 2008
Location: Dallas Texas
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This is a little different homemade one. A real rough setup so far. Peltor hearplug frame with a comply NR-10 ear phone. The Peltor frame is more rigid than most, that helps the microphone stay in place. Still to go is a small project box to hide
the microphone electronics, maybe an audio transformer for impedence matching, and a volume control pot. And heat shrinked for cable appearance.
Worked good in a Citation 550, and a King Air.
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  #156  
Old 02-05-2011, 12:02 PM
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Bullseye Bullseye is offline
 
Join Date: Sep 2009
Location: Wichita, KS
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Well, I finally splurged on the $15 at Radio Shack and did mine (well, plus a birthday present worth of Klipsch earbuds and an old Telex headset).

I decided to keep the end-to-end mic circuit from the old headset, and focus on the earbuds part for now. I had to do a little edumacation about potentiometers and audio transformers, but all the smoke stayed in the wires, and I didn't injure myself.

I also made them Mono. Version 2.0 will be stereo, and maybe have a switch selection for mono/stereo, and maybe another input for music.

Anyway, the whole build post is here (http://n999za.wordpress.com/2011/02/...n-ear-headset/), but here's a couple teaser pictures.

I don't have the mic mounting yet, but I plugged them into the stereo last night, and they sounded just like my David Clarks...

Went from this...

...to this...
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  #157  
Old 04-29-2012, 09:02 PM
designerX designerX is offline
 
Join Date: Sep 2005
Posts: 147
Default Can't hear myself transmit on DIY headset

This is a great project and I'm pleased with how my DIY came out... except I can't hear myself transmit. Apparently I'm loud and clear to everyone else but would like to remedy this issue. I used the parts from an AvComm headset but supplemented the mic with a radioshack version.

Any thoughts on how to fix?

Thanks in advance,
Stan
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  #158  
Old 08-31-2012, 12:43 PM
wassupdude wassupdude is offline
 
Join Date: Aug 2012
Location: Rochester, NY
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Quote:
Originally Posted by DCat22 View Post
Flew with the straight through Plantronics today. (Mic without bias, ring NC.)

Was pretty awesome actually. I don't think I can ever go back to a headset... much quieter than my old Peltor's. Audio quality was superb. Mic seemed to work well on radio transmit. Seems like the "head footprint" is less than the Halo or CA's with no "wire" or "headset" and with the Comply tips I think they might even stay in place during light acro -- just make sure you squish them real good before putting them in. I wanted to keep talking to ATC just because...

HOWEVER, the intercom didn't work so well...not a squelch issue, but I have to talk very loud and steady. I'm going to try to add a battery powered mic bias and test again this weekend. But, solo, it was perfect.

This is what I used, from Amazon:

Plantronics 480 ($20.44 shipped)
Comply T-400 Tips ($14.95 for 3 pairs)

And from Mouser:

1x Small Case ($2.96)
2x 3.5mm Jack ($1.29)
1x Red 1/4" Audio Plug ($6.90)
1x Black .206" Mic Plug ($9.02)

...I swapped the red/black cases so the mic was the red jack. Also picked up a stereo "extender" cable locally so I could find one in-person with a good feel...nice flexible but tough 1/4" cable. Cut the ends off and in half to use for the "to plane" wire. Other than that, just drilled the case and soldered the wires to the jacks and plugs. (I didn't have a spare headset to use, and since the Plantronics 480 is a little delicate, wanted to be able to use it without modification...and build an "adaptor box", which could also work with any other PC headset too. I'll probably order two spares in case they become hard to find.)

I actually got 3 mini jacks, so I'm going to use the 3rd as an input for a battery back with a variable bias resistance and voltage to the mic's ring contact so I can experiment with the best mix for radio and intercom use (if it helps at all...). Will post what happens...and document the wiring if it works well. )

All in, less than $65. =)

this is great. Can you give a picture inside of the box?
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  #159  
Old 08-31-2012, 09:51 PM
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DCat22 DCat22 is offline
 
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Location: Houston, TX
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Quote:
Originally Posted by wassupdude View Post
this is great. Can you give a picture inside of the box?
If I can find it, sure. In it's last working form though, it's a straight pass-through though. ie. just:

1x Small Case ($2.96)
2x 3.5mm Jack ($1.29)
1x Red 1/4" Audio Plug ($6.90)
1x Black .206" Mic Plug ($9.02)
(wires from a broken headset)

....just to adapt the plugs, based on wiring examples here and around the web.

As I think there was discussion here since, the mic needs help to work well in a plane. If I stuck it "in my mouth" it would be okay.... And I've still used it since for some not-much-comms trips. But otherwise mic performance is not ideal out of the box.

I had started some experimentation using a portable intercom, that setup, and a normal headset so I could work on the handling the PC mic interface properly in the shop, and listen to the results...but haven't done much with it. I think some other folks here may have though...ie. an example above of using the mic guys from an existing aviation headset.

Once I fly more, I'll be getting it working or buying Halo's or CA's. It was enough I can't stand the clamps anymore.
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Last edited by DCat22 : 08-31-2012 at 09:54 PM.
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  #160  
Old 09-01-2012, 05:10 PM
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DCat22 DCat22 is offline
 
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Quote:
Originally Posted by wassupdude View Post
this is great. Can you give a picture inside of the box?
Here's a big image that shows how un-exciting that baseline version is: http://n95vv.com/images/headsetbox.jpg (white wire on the headset jack is not connected, yet, on purpose)

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