---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 12/15/22: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:46 PM - 12v to 9v converter (Jim Merrill) 2. 01:49 PM - Re: 12v to 9v converter (Alec Myers) 3. 03:15 PM - Re: 12v to 9v converter (Charlie England) 4. 03:31 PM - 2022 List of Contributors (LOC)... (Matt Dralle) 5. 08:15 PM - Re: 12v to 9v converter (Charlie England) ________________________________ Message 1 _____________________________________ Time: 01:46:44 PM PST US Subject: AeroElectric-List: 12v to 9v converter From: "Jim Merrill" I have 2 headsets that use 9v batteries for the noise canceling feature. I would like to eliminate the batteries with a converter wired to 12volts. A quick search found some really cheap ones such as this: https://www.amazon.com/dp/B07QGXL9XP/?coliid=IYLAXI7YVIXIG&colid=21QIC5UMRO2OL&psc=1&ref_=lv_ov_lig_dp_it Would this do the job without making noise in the headsets or radio (a handheld currently)? The plane is an Aeronca Champ with no electrical system. My ultimate plan is to use a small Earthx battery to power the headsets and a Garmin GTR200 radio . This radio also has a nice intercom. Thanks for any advice! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=509510#509510 ________________________________ Message 2 _____________________________________ Time: 01:49:33 PM PST US From: Alec Myers Subject: Re: AeroElectric-List: 12v to 9v converter You might investigate whether theyll happily run from 12V without any conversion. On Dec 15, 2022, at 4:46 PM, Jim Merrill wrote: I have 2 headsets that use 9v batteries for the noise canceling feature. I would like to eliminate the batteries with a converter wired to 12volts. A quick search found some really cheap ones such as this: https://www.amazon.com/dp/B07QGXL9XP/?coliid=IYLAXI7YVIXIG&colid=21QIC5UMRO2OL&psc=1&ref_=lv_ov_lig_dp_it Would this do the job without making noise in the headsets or radio (a handheld currently)? The plane is an Aeronca Champ with no electrical system. My ultimate plan is to use a small Earthx battery to power the headsets and a Garmin GTR200 radio . This radio also has a nice intercom. Thanks for any advice! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=509510#509510 ________________________________ Message 3 _____________________________________ Time: 03:15:14 PM PST US From: Charlie England Subject: Re: AeroElectric-List: 12v to 9v converter Good point, and a quick phone call to the mfgr would probably answer that question. On the converter, you really won't know until you try it. Some cheap buck converters are noise-free, others aren't, and some people have bought one that was noise-free, bought another from the same vendor and it wasn't. If you want total silence at the expense of some efficiency loss, you can roll your own linear regulator with some sort of small container & whatever wire/connectors you choose to make everything play together. I've used plastic film canisters (remember those?) and plastic prescription bottles. There are probably better, more modern options available these days, but my 5 decade old favorite for extremely low current demand stuff like GPS pucks and headsets is the LM78xx series 3 terminal regulator . With such low power consumption you shouldn't even need a heatsink; all you need is a wire from input to the battery, a pair of wires from the ground terminal to the battery ground and the device ground, and a wire from its output to the device's power input. For 9V, you want an LM7809; the last two digits denote the output voltage. Unsolicited advice: You can get equivalent results from the battery if you look almost anywhere else (scroll down for the smaller cheaper versions), for a 12V Lithium Iron Phosphate battery. And if you're comfortable with the battery in the cellphone in your pocket while flying, you could also go to Lithium Ion. They're actually making L-I 9V batteries now, or you really want a lot of capacity, you could forget about the linear regulator and just use a battery pack intended for remote controlled hobby a/c & cars . You'd need a charger, but that applies to any of the others as well. Charlie On Thu, Dec 15, 2022 at 3:53 PM Alec Myers wrote: > > You might investigate whether they=99ll happily run from 12V withou t any > conversion. > > > On Dec 15, 2022, at 4:46 PM, Jim Merrill wrote: > > glastar5901@gmail.com> > > I have 2 headsets that use 9v batteries for the noise canceling feature. I > would like to eliminate the batteries with a converter wired to 12volts. A > quick search found some really cheap ones such as this: > > https://www.amazon.com/dp/B07QGXL9XP/?coliid=IYLAXI7YVIXIG&colid=21QI C5UMRO2OL&psc=1&ref_=lv_ov_lig_dp_it > > Would this do the job without making noise in the headsets or radio (a > handheld currently)? The plane is an Aeronca Champ with no electrical > system. My ultimate plan is to use a small Earthx battery to power the > headsets and a Garmin GTR200 radio . This radio also has a nice intercom. > Thanks for any advice! > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=509510#509510 > > ________________________________ Message 4 _____________________________________ Time: 03:31:16 PM PST US From: Matt Dralle Subject: AeroElectric-List: 2022 List of Contributors (LOC)... Dear Listers, The 2022 Matronics Email List and Forum Fund Raiser officially ended a couple of weeks ago and it's time that I published this year's List of Contributors. It is the people on this list that directly make these Email Lists and Forums possible! Their generous Contributions keep the servers and Internet connection up and running! You can still show your support this year and pick up a great gift at the same time. The Contribution Web Site is fast, easy, and secure: http://www.matronics.com/contribution Or, by dropping a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 And finally, I'm proud to present The 2022 Fund Raiser List of Contributors: https://matronics.com/loc Thank you again to everyone that made a Contribution this year!! Matt Dralle Matronics Email List & Forum Administrator ________________________________ Message 5 _____________________________________ Time: 08:15:49 PM PST US Subject: Re: AeroElectric-List: 12v to 9v converter From: Charlie England Well, duh=2E Just noticed the need to power the radio in the original post =2E The regulator advice still applies,=C2- as does the choice for 12v ba tteries=2E Apologies for my careless reading=2E Charlie =81=A3Get BlueMail for Android =8B On Dec 15, 2022, 5:13 PM, at 5:13 PM, Charl ie England wrote: >Good point, and a quick phone c all to the mfgr would probably answer >that >question=2E > >On the converte r, you really won't know until you try it=2E Some cheap >buck >converters a re noise-free, others aren't, and some people have bought >one >that was no ise-free, bought another from the same vendor and it wasn't=2E > >If you wa nt total silence at the expense of some efficiency loss, you >can >roll you r own linear regulator with some sort of small container & >whatever >wire/ connectors you choose to make everything play together=2E I've used >plasti c film canisters (remember those?) and plastic prescription >bottles=2E >Th ere are probably better, more modern options available these days, >but my >5 decade old favorite for extremely low current demand stuff like GPS >puc ks >and headsets is the LM78xx series 3 terminal regulator >=2E >With such low power consumption you sh ouldn't even need a heatsink; >all >you need is a wire from input to the b attery, a pair of wires from the >ground terminal to the battery ground and the device ground, and a wire >from its output to the device's power input =2E For 9V, you want an >LM7809; >the last two digits denote the output vol tage=2E > >Unsolicited advice: You can get equivalent results from the batt ery if >you >look almost anywhere else > >(scroll >down for the smaller cheape r versions), for a 12V Lithium Iron >Phosphate >battery=2E And if you're co mfortable with the battery in the cellphone in >your pocket while flying, y ou could also go to Lithium Ion=2E They're >actually making L-I 9V batterie s > >now, or you really want a lot of capacity, you could for get about the >linear regulator and just use a battery pack intended for re mote >controlled >hobby a/c & cars >=2E >You'd need a charger, but that applies to any of the others as well=2E > >Charlie > > >On Thu, Dec 15, 2022 at 3:53 PM Alec Myers wrote: > > >> >> You might investigate whether they=99ll happily run from 1 2V without >any >> conversion=2E >> >> >> >> On Dec 15, 2022, at 4:46 PM, J im Merrill >wrote: >> >> --> AeroElectric-List me ssage posted by: "Jim Merrill" < >> glastar5901@gmail=2Ecom> >> >> I have 2 headsets that use 9v batteries for the noise canceling >feature=2E I >> wo uld like to eliminate the batteries with a converter wired to >12volts=2E A >> quick search found some really cheap ones such as this: >> >> >https:// www=2Eamazon=2Ecom/dp/B07QGXL9XP/?coliid=IYLAXI7YVIXIG&colid=21QIC5UMRO 2OL&psc=1&ref_=lv_ov_lig_dp_it >> >> Would this do the job without maki ng noise in the headsets or radio >(a >> handheld currently)? The plane is an Aeronca Champ with no electrical >> system=2E My ultimate plan is to use a small Earthx battery to power >the >> headsets and a Garmin GTR200 radio =2E This radio also has a nice >intercom=2E >> Thanks for any advice! >> > > >> >> >> Read this topic online here: >> >> http://forums=2Ematronics=2Ec om/viewtopic=2Ephp?p=509510#509510 >> >> >> ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.