---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 03/29/18: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 ------------------------------------------------------------------------------------- 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.