Matronics Email Lists :: View topic - Radio battery voltage?

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Radio battery voltage?

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

ronburnett(at)charter.net
Guest

Posted: Mon Sep 14, 2015 4:55 pm Post subject: Radio battery voltage?

I have a Luscombe and use an ICOM radio/VOR on a Quantum rechargeable battery.  On the radio I also use a 10 cell AA attached battery which measures 16 volts with new cells in it.



My question is does this high battery voltage "trump" my 12.6 rechargeable?  It seems to as my batteries keep needing to be replaced and I rarely need to charge the rechargeable.



Inquiring minds want to know.



Thanks,



Ron Burnett N1131B Luscombe 8A

N524RB RV-6A



Sent from my iPad

May you have the blessings of the Lord today.

- The Matronics AeroElectric-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?AeroElectric-List

ceengland7(at)gmail.com
Guest

Posted: Mon Sep 14, 2015 6:03 pm Post subject: Radio battery voltage?

On 9/14/2015 7:53 PM, Ron Burnett wrote:

 	  Quote: 	
		   



 I have a Luscombe and use an ICOM radio/VOR on a Quantum rechargeable battery.  On the radio I also use a 10 cell AA attached battery which measures 16 volts with new cells in it.



 My question is does this high battery voltage "trump" my 12.6 rechargeable?  It seems to as my batteries keep needing to be replaced and I rarely need to charge the rechargeable.



 Inquiring minds want to know.



 Thanks,



 Ron Burnett N1131B Luscombe 8A

 N524RB RV-6A




	


Are you saying that you're using an Icom portable, with a 10 cell 

internal battery pack, and you're supplying 12V to the same portable 

through its external power jack?



If so, then 'it depends'. Some portables will charge the internal pack 

from the external power jack; some won't. But 12V won't charge a 16V 

battery pack, in any case. Some portables actually disconnect the 

internal battery pack when powered off the external power jack.



Why not simply remove the battery pack & run off the 12V battery. If you 

lose the battery, reinstall the internal pack.

- The Matronics AeroElectric-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?AeroElectric-List

user9253

Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan

Posted: Mon Sep 14, 2015 6:29 pm Post subject: Re: Radio battery voltage?

If two power sources are connected to a load, the load will draw all current from the higher voltage source and draw no current from the lower voltage source.

- The Matronics AeroElectric-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?AeroElectric-List

_________________
Joe Gores

jimkale(at)roadrunner.com
Guest

Posted: Mon Sep 14, 2015 8:16 pm Post subject: Radio battery voltage?

The explanation below is true, but too simplistic.    Most battery devices

have a diode built in so that if a higher voltage is applied, the device

will use power from the higher voltage source, but the diode will prevent

current from flowing into the battery (lower voltage source in this case)

If the battery is rechargeable, there may be a path to charge the battery

while the device is using the higher source.    However, with regard to

non-rechargeable batteries, that would be bad news.



Bottom line it all depends on how the device circuitry for using outside

sources, and internal batteries.   Let the user beware with regard to

devices where the circuitry is not known.



I once used an ICOM IC A-23 handheld radio.  The instructions were unclear

about recharging the rechargeable battery while using the external plug.   I

finally experimented at the risk of the handheld smoking.    Turned out that

my rechargeable batteries did charge while the radio used the higher

external source voltage, and I did no harm to my handheld.   However, the

results may have been much less desirable.



Jim Kale



--

- The Matronics AeroElectric-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?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum