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icubob(at)newnorth.net
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 Posted: Fri Jan 12, 2007 2:40 pm Post subject: icom radio |
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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
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| Posted: Fri Jan 12, 2007 3:12 pm Post subject: icom radio |
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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
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nuckollsr(at)cox.net
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| Posted: Fri Jan 12, 2007 3:57 pm Post subject: icom radio |
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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
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| Posted: Fri Jan 12, 2007 4:26 pm Post subject: icom radio |
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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
|
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icubob(at)newnorth.net
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| Posted: Fri Jan 12, 2007 7:18 pm Post subject: icom radio |
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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]
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DC supply cable from my ham radio toolkit, good for at least 8 Amps.