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A200-Help

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nuckollsr(at)cox.net
Guest

Posted: Sun Feb 12, 2006 12:37 pm Post subject: A200-Help

At 09:47 AM 2/12/2006 -0800, you wrote:



 	  Quote: 	
		  



Bob, very nice diagrams, much nicer than mine. Two comments.....



   "I'd  intended to show how to "dummy load" the speaker

output with an inset on page 2."



Regarding  comment about speaker dummy load -  I called ICOM and

they told me emphatically that it was not necessary to connect

anything to the speaker load, so your diagram is correct. Other than

that I think we had similar ideas.


	


        Very good. I've deleted that feature from Note 3.



 	  Quote: 	
		  

The second item is the internal back light. You show it connect to the

nav lights as ON and OFF deal. It does seem like this from the

text, like it is a ON/half/OFF deal from the text. Again a call to ICOM

says back lighting is affected by voltage. In other words light intensity

is variable and proportional when connected to a variable voltage.


	


      Hmmmm . . . it would be nice then if they'd included the

      the current draw of this lead for allowing one to size

      their dimmer requirements. If you or anyone else can

      provide a full-bright dimmer lead load value, I'd

      be pleased to add it to the drawings.



 	  Quote: 	
		  



   ICOM errata:

The previous post that ICOM shows the incorrect optional

switches for the Yoke mounted channel and frequency exchange

switches, I believe they have corrected it. They show spring

loaded DTSP toggle, normally in center open position and

momentary to ground pin L or 12. The optional switch choice is

two single momentary SPST switches to ground.


	


      Yeah, the ICOM data I found seemed to have the wiring

      right. I just showed the spring-loaded-center-off version.



      I'll hold off posting Rev -B- with hopes that someone can

      get a dimmer load current value.



      Bob . . .

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Bill Denton

Joined: 10 Jan 2006
Posts: 97
Location: Chicago, IL USA

Posted: Sun Feb 12, 2006 3:03 pm Post subject: A200-Help

Bob...



I'm not 1,000% sure of this but it seems like I read somewhere that the

actual current for the lighting comes from the +14 power lead, and the

voltage fed to the "dimmer" pin is just a small control voltage, with very

little current draw.



Again, not 1,000% sure on this...



--

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klehman(at)albedo.net
Guest

Posted: Sun Feb 12, 2006 3:10 pm Post subject: A200-Help

That would be 300 mA at 13.8 volts.

I ended up with a 3 position toggle switch and a couple of resistors for 

dim-off-bright on mine.

Ken



Robert L. Nuckolls, III wrote:

snip



 	  Quote: 	
		        I'll hold off posting Rev -B- with hopes that someone can

      get a dimmer load current value.



      Bob . . .

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