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                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Thu 03/29/18: 2
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Today's Message Index:
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     1. 09:43 PM - Hardwire an old ICOM IC-A21 handheld radio  (David)
     2. 10:03 PM - Re: Hardwire an old ICOM IC-A21 handheld radio  (Charlie England)
 
 
 
________________________________  Message 1  _____________________________________


Time: 09:43:48 PM PST US
From: David 
Subject: AeroElectric-List: Hardwire an old ICOM IC-A21 handheld radio

I would like to provide power to an older ICOM A21 handheld radio in my
plane outfitted with an B&C SD-8, in the case of radio battery failure.
The radio came with a wall plug AC to DC adapter that puts out 13.5v at
1000mA.  How can I hardwire power to the radio and make sure it limits the
current so I don't smoke my radio?  Can I just cut the cord off the AC-DC
adapter and run it to a fuse block with a 1 amp fuse?

Thanks,  David

________________________________  Message 2  _____________________________________


Time: 10:03:29 PM PST US
Subject: Re: AeroElectric-List: Hardwire an old ICOM IC-A21 handheld radio
From: Charlie England 

The radio will only draw the current it needs, as long as the voltage isn't
 too high=2E The fuse protects=C2- the wire=2E 1A fuse would be marginal,
 since you can expect the radio to draw somewhere near the design output cu
rrent of the supply=2E 

Cut the wire off the adapter, connect through a 2A
 fuse to the a/c bus=2E Or better, just buy the proper connector and some w
ire, and keep the existing power supply intact=2E

=81=A3Charlie
=8B

On Mar 30, 2018, 12:48 AM, at 12:48 AM, David  wrote:
>I would like to provide power to an older ICOM A21 handheld radio
 in my
>plane outfitted with an B&C SD-8, in the case of radio battery fail
ure=2E
>The radio came with a wall plug AC to DC adapter that puts out 13
=2E5v at
>1000mA=2E  How can I hardwire power to the radio and make sure it
 limits
>the
>current so I don't smoke my radio?  Can I just cut the cord o
ff the
>AC-DC
>adapter and run it to a fuse block with a 1 amp fuse?
>
>Tha
nks,  David

 

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