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
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| Subject: | 12v to 9v converter |
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
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| Subject: | Re: 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 <glastar5901@gmail.com> 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
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| Subject: | Re: 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
<https://www.google.com/search?q=lm7809&oq=lm7809&aqs=chrome..69i57.8
248j0j7&sourceid=chrome&ie=UTF-8>.
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
<https://smile.amazon.com/s?k=lithium+iron+phosphate+battery&crid=1K8U9
86AGUPK9&sprefix=lithiu+iron%2Caps%2C115&ref=nb_sb_ss_sc_1_12>
(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
<https://www.google.com/search?q=9v+lithium+ion+rechargeable+battery&sxsr
f=ALiCzsZfkxFOhHI-bDVa4BN3oXdBQEoJ9g%3A1671145281860&ei=QaebY9eCNJWYptQ
P6rG_gAo&oq=9v+lithium+ion+battery&gs_lcp=Cgxnd3Mtd2l6LXNlcnAQARgBMgcIA
BCABBANMgYIABAHEB4yBwgAEIAEEA0yBAgAEB4yBAgAEB4yBggAEAUQHjIGCAAQBRAeMgYIABAF
EB4yCQgAEAgQHhDxBDIJCAAQCBAeEPEEOgoIABBHENYEELADOgcIABCwAxBDOg0IABDkAhDWBBC
wAxgBOg8ILhDlBBDIAxCwAxBDGAI6BAgjECc6BwguEOUEEEM6BAgAEEM6BQgAEIAEOggIABAIEA
cQHjoLCAAQCBAHEB4Q8QQ6CAgAEAUQBxAeSgQIQRgASgQIRhgBUMgDWMITYK8oaAFwAXgAgAGGA
YgBmQOSAQMyLjKYAQCgAQHIARHAAQHaAQYIARABGAnaAQYIAhABGAg&sclient=gws-wiz-se
rp#ip=1>
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
<https://www.amazon.com/Tenergy-Capacity-Rechargeable-Standard-Connector/dp
/B001BA292A/ref=sr_1_6?crid=313SS6ZR9TSI5&keywords=9v+lithium+ion+rc+
battery+pack&qid=1671145806&sprefix=9v+lithium+ion+rc+battery+pack%2Cap
s%2C135&sr=8-6>.
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 <alec@alecmyers.com> 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 <glastar5901@gmail.com> 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
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| Subject: | 2022 List of Contributors (LOC)... |
Dear Listers,
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It is the people on this list that directly make these Email Lists and Forums
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Or, by dropping a personal check in the mail to:
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And finally, I'm proud to present The 2022 Fund Raiser List of Contributors:
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Thank you again to everyone that made a Contribution this year!!
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Matronics Email List & Forum Administrator
Message 5
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| Subject: | Re: 12v to 9v converter |
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 <ceengland7@gmail=2Ecom> 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
><https://www=2E
google=2Ecom/search?q=lm7809&oq=lm7809&aqs=chrome=2E=2E69i57=2E8248j0
j7&sourceid=chrome&ie=UTF-8>=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
><https://smile=2Eamazon=2Ecom/s?k
=lithium+iron+phosphate+battery&crid=1K8U986AGUPK9&sprefix=lithiu+iro
n%2Caps%2C115&ref=nb_sb_ss_sc_1_12>
>(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
><https://www=2Egoogle=2Ecom/search?q=9v+lithium+ion+rechargeable+batte
ry&sxsrf=ALiCzsZfkxFOhHI-bDVa4BN3oXdBQEoJ9g%3A1671145281860&ei=QaebY9eC
NJWYptQP6rG_gAo&oq=9v+lithium+ion+battery&gs_lcp=Cgxnd3Mtd2l6LXNlcnAQAR
gBMgcIABCABBANMgYIABAHEB4yBwgAEIAEEA0yBAgAEB4yBAgAEB4yBggAEAUQHjIGCAAQBRAeM
gYIABAFEB4yCQgAEAgQHhDxBDIJCAAQCBAeEPEEOgoIABBHENYEELADOgcIABCwAxBDOg0IABDk
AhDWBBCwAxgBOg8ILhDlBBDIAxCwAxBDGAI6BAgjECc6BwguEOUEEEM6BAgAEEM6BQgAEIAEOgg
IABAIEAcQHjoLCAAQCBAHEB4Q8QQ6CAgAEAUQBxAeSgQIQRgASgQIRhgBUMgDWMITYK8oaAFwAX
gAgAGGAYgBmQOSAQMyLjKYAQCgAQHIARHAAQHaAQYIARABGAnaAQYIAhABGAg&sclient=gws
-wiz-serp#ip=1>
>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
><https://www=2Eamazon=2Ecom/Tenergy-Cap
acity-Rechargeable-Standard-Connector/dp/B001BA292A/ref=sr_1_6?crid=313
SS6ZR9TSI5&keywords=9v+lithium+ion+rc+battery+pack&qid=1671145806&spref
ix=9v+lithium+ion+rc+battery+pack%2Caps%2C135&sr=8-6>=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 <alec@alecmyers=2Ecom> wrote:
>
><alec@alecmyers=2E
com>
>>
>> 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 <glastar5901@gmail=2Ecom>
>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
>>
>>
>>
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