---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Sat 05/31/14: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:50 AM - Re: headsets (taildrags) 2. 04:12 PM - Re: Re: headsets (Ray Krause) 3. 08:01 PM - Re: headsets (taildrags) 4. 08:27 PM - Re: Re: headsets (Ray Krause) 5. 08:44 PM - Re: Re: headsets (Ned Lebens) ________________________________ Message 1 _____________________________________ Time: 09:50:49 AM PST US Subject: Pietenpol-List: Re: headsets From: "taildrags" Okay, so I may have a new best friend on this list (Ned, who gave me the idea to try this). I picked up a few bits at Radio Shack and cobbled up a little impedance matching setup to try with my headset. Pay no attention to the materials or workmanship... this is just a test. But wowza-! Yes indeed, it does boost the volume through the receivers! So it worked while sitting at my back patio waiting for the soldering pencil to cool off and it worked well enough that I had to crank the volume down a couple of notches. I hope to go flying today and see how it works in the air. News at 10... picture of the little homebrew box attached. -------- Oscar Zuniga Medford, OR Air Camper NX41CC "Scout" A75 power Read this topic online here: http://forums.matronics.com/viewtopic.php?p=424121#424121 Attachments: http://forums.matronics.com//files/img_3116_117.jpg ________________________________ Message 2 _____________________________________ Time: 04:12:05 PM PST US From: Ray Krause Subject: Re: Pietenpol-List: Re: headsets How about a schematic si I can build one? Thanks, Ray Krause Sent from my iPad > On May 31, 2014, at 9:50 AM, "taildrags" wrote: > > > Okay, so I may have a new best friend on this list (Ned, who gave me the idea to try this). I picked up a few bits at Radio Shack and cobbled up a little impedance matching setup to try with my headset. Pay no attention to the materials or workmanship... this is just a test. But wowza-! Yes indeed, it does boost the volume through the receivers! So it worked while sitting at my back patio waiting for the soldering pencil to cool off and it worked well enough that I had to crank the volume down a couple of notches. I hope to go flying today and see how it works in the air. News at 10... picture of the little homebrew box attached. > > -------- > Oscar Zuniga > Medford, OR > Air Camper NX41CC "Scout" > A75 power > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=424121#424121 > > > > > Attachments: > > http://forums.matronics.com//files/img_3116_117.jpg > > > > > > > ________________________________ Message 3 _____________________________________ Time: 08:01:21 PM PST US Subject: Pietenpol-List: Re: headsets From: "taildrags" Ray; there's really nothing to it, but I'll sketch up a schematic and post it. After giving it a little more thought, maybe instead of dismantling this ugly duckling impedance matcher, I'll mail it to anybody who is curious to try it out on their headset if you're using a handheld. It's less than $10 worth of Radio Shack parts, although the factory-made units are over $130. If you're using a panel-mount com, it's likely that the radio is already looking for the higher impedance of a headset and you don't need to do anything, but apparently handhelds and portable equipment use lower impedance audio output. I'm really curious to see if Mike Cuy's headset picks up some volume with it. Ray, if you'd like to try it out just send me your postal address and I'll mail it to you to play with. Find a continuously broadcasting station like ATIS, put on your headset as usual, note the headset volume, and then insert the matcher between your radio and headset to see if the volume increases. I flew with the setup today and I could hear Tower perfectly without leaning forward behind the windscreen or backing off the throttle! It's obvious that it needs shielded wiring and needs to be enclosed because I hadn't had any problem with ATC hearing me before, but now they say I'm scratchy and weak and the only thing that changed was me inserting the impedance matcher in line with the headset so it must be letting ignition noise or other interference in. I'll fabricate a proper one now, and see if the interference goes away if I use shielded wiring and an enclosed metal box for it. Ned: thanks again! -------- Oscar Zuniga Medford, OR Air Camper NX41CC "Scout" A75 power Read this topic online here: http://forums.matronics.com/viewtopic.php?p=424135#424135 ________________________________ Message 4 _____________________________________ Time: 08:27:59 PM PST US From: Ray Krause Subject: Re: Pietenpol-List: Re: headsets Oscar, You are a great guy! Thanks for such a generous offer. I will try my various headsets with my hand held in the next few days and see if there is any differences among them. Then, when I get the Aeronca back from its annual, I will try all that stuff in the plane. Nothing seems to work with the radio in the Aeronca! But my Clarity Aloft in-the-ear headset works great in the Aeronca with just the intercom. When the radio is in the loop, it is terrible. I just made a set of shielded ignition wires for the Aeronca by placing a piece of mesh shield covering (from ACS) over each wire, then covering it with heat shrink. The shielding is then grounded on the magneto end to the magneto. I will still be using the same non- shielded plugs (trying to stay as original as possible, at least original looking!). If this does not eliminate the ignition noise, I will go to an ACS shielded harness and shielded plugs. Whichever system works, I will use on the A-65 in my SkyScout when it is done. If all this fails, I will ask to barrow your "gender mender". And "Thanks, Ned"! I will be in contact. Hope you make it to Frazier Lake next Saturday. Thanks, Ray Sent from my iPad > On May 31, 2014, at 8:00 PM, "taildrags" wrote: > > > Ray; there's really nothing to it, but I'll sketch up a schematic and post it. After giving it a little more thought, maybe instead of dismantling this ugly duckling impedance matcher, I'll mail it to anybody who is curious to try it out on their headset if you're using a handheld. It's less than $10 worth of Radio Shack parts, although the factory-made units are over $130. If you're using a panel-mount com, it's likely that the radio is already looking for the higher impedance of a headset and you don't need to do anything, but apparently handhelds and portable equipment use lower impedance audio output. I'm really curious to see if Mike Cuy's headset picks up some volume with it. Ray, if you'd like to try it out just send me your postal address and I'll mail it to you to play with. Find a continuously broadcasting station like ATIS, put on your headset as usual, note the headset volume, and then insert the matcher between your radio and headset to see if the volume ! > increases. > > I flew with the setup today and I could hear Tower perfectly without leaning forward behind the windscreen or backing off the throttle! It's obvious that it needs shielded wiring and needs to be enclosed because I hadn't had any problem with ATC hearing me before, but now they say I'm scratchy and weak and the only thing that changed was me inserting the impedance matcher in line with the headset so it must be letting ignition noise or other interference in. I'll fabricate a proper one now, and see if the interference goes away if I use shielded wiring and an enclosed metal box for it. > > Ned: thanks again! > > -------- > Oscar Zuniga > Medford, OR > Air Camper NX41CC "Scout" > A75 power > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=424135#424135 > > > > > > > > > > ________________________________ Message 5 _____________________________________ Time: 08:44:12 PM PST US Subject: Re: Pietenpol-List: Re: headsets From: Ned Lebens Hello Oscar, Very glad to hear that it is working for you. The noise issue might be tougher to fix, but hopefully the shielding will do it. I'm sure you'll let us know. I've sketched up a schematic for Ray - it should be attached. Ned ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pietenpol-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pietenpol-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/pietenpol-list Browse Digests http://www.matronics.com/digest/pietenpol-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.