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icubob(at)newnorth.net
Guest

Posted: Fri Jan 12, 2007 2:40 pm Post subject: icom radio

hi all, i am getting started on the wiring of my  ic-a200 icom radio. i would use an 18 ga wire to the ''power '' pin and an 18 ga  wire to the ''ground'' pin of the radio . the enclosed wiring instructions say  this.........POWER CABLE WIRING...

  use 2 pairs of 18 ga wires for power and  power grounding.

     what the heck? the diagram is  very simple and if it werent for the printed statement above i would just  proceed. anyone wired one of these radios? what do their instructions mean?  thanks for any info.

       

                            bob noffs

    [quote][b]

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larry(at)macsmachine.com
Guest

Posted: Fri Jan 12, 2007 3:12 pm Post subject: icom radio

Hi Bob,

The Molex connector has multiple grounds and there are also power inputs 

at B, M and 11. 

I'm sure that's all they're referring to.  I remember going thru the 

same ?? when wiring the A200.



Larry McFarland -601HDS at www.macsmachine.com



bob noffs wrote:

 	  Quote: 	
		   hi all, i am getting started on the wiring of my ic-a200 icom radio. i 

 would use an 18 ga wire to the ''power '' pin and an 18 ga wire to the 

 ''ground'' pin of the radio . the enclosed wiring instructions say 

 this.........POWER CABLE WIRING...

  use 2 pairs of 18 ga wires for power and power grounding.

     what the heck? the diagram is very simple and if it werent for the 

 printed statement above i would just proceed. anyone wired one of 

 these radios? what do their instructions mean? thanks for any info.

      

                           bob noffs

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wrmaxwell(at)bigpond.com
Guest

Posted: Fri Jan 12, 2007 3:18 pm Post subject: icom radio

The instructions are simply aiming to ensure that  the radio can access sufficient current once you hit PTT, Bob.  A single 18  ga wire would presumably run the risk of supplying inadequate current.  I  have wired up several A200 but have used a single run of conventional  multistrand twin (figure  DC supply cable from my ham radio toolkit, good for  at least 8 Amps.

  

 Bill

  

 [quote]   ---

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nuckollsr(at)cox.net
Guest

Posted: Fri Jan 12, 2007 3:57 pm Post subject: icom radio

At 04:38 PM 1/12/2007 -0600, you wrote:



 	  Quote: 	
		  hi all, i am getting started on the wiring of my ic-a200 icom radio. i 

would use an 18 ga wire to the ''power '' pin and an 18 ga wire to the 

''ground'' pin of the radio . the enclosed wiring instructions say 

this.........POWER CABLE WIRING...

  use 2 pairs of 18 ga wires for power and power grounding.

     what the heck? the diagram is very simple and if it werent for the 

 printed statement above i would just proceed. anyone wired one of these 

 radios? what do their instructions mean? thanks for any info.


	


    I'm mystified about this trend in the newer radios

    to suggest not only multiple power and ground leads but

    the suggested sizes are very generous too. For a radio

    that draws a couple of amps, 18AWG wire is certainly

    plenty big for the job.



    Looking over the installation instructions, the only

    rationale I can deduce for multiple wires is redundancy.

    Their choice of I/O connectors for this radio is highly

    suspect. We quit using board edge fingers and large-area,

    low-pressure connectors in new products years ago where

    I work. MUCH better that they would choose to use at least

    a d-sub connector. Given the poor history of the card-edge

    fingers in aircraft, I suppose someone might have thought

    they were increasing system reliability with multiple

    power wires . . . but that idea works only if there are

    no other single wires that would disable the radio.



    As to oversized wire, I can't guess. I've been a great

    fan of Icom Ham equipment for years. I've not heard

    any complaints about the A200 performance but their

    packaging leaves something to be desired.



    My suggestion is that single, 20AWG power and ground

    feeders will suffice and probably be more reliable

    because this gage actually FITS the pins you're trying

    to crimp onto the wires.



    Bob . . .

      ---------------------------------------------------------

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

      ---------------------------------------------------------

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harvey4(at)earthlink.net
Guest

Posted: Fri Jan 12, 2007 4:26 pm Post subject: icom radio

Bob....I got held up by the same stupid instructions. Just wire it as you would think - one wire for ground, one for power.

 Neil



 



 At 05:38 PM 1/12/2007, you wrote:



  	  Quote: 	
		  hi all, i am getting started on the wiring of my ic-a200 icom radio. i would use an 18 ga wire to the ''power '' pin and an 18 ga wire to the ''ground'' pin of the radio . the enclosed wiring instructions say this.........POWER CABLE WIRING...

  use 2 pairs of 18 ga wires for power and power grounding.

     what the heck? the diagram is very simple and if it werent for the printed statement above i would just proceed. anyone wired one of these radios? what do their instructions mean? thanks for any info.

       

                           bob noffs

- 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

icubob(at)newnorth.net
Guest

Posted: Fri Jan 12, 2007 7:18 pm Post subject: icom radio

hi all, thanks to everyone that responded to my  question. after getting thru the confusing written instructions the rest should  be easy!

                                 bob noffs

    [quote][b]

- 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:

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