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A200-Help

 
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nuckollsr(at)cox.net
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PostPosted: Sun Feb 12, 2006 12:37 pm    Post subject: A200-Help Reply with quote

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

PostPosted: Sun Feb 12, 2006 3:03 pm    Post subject: A200-Help Reply with quote

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
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PostPosted: Sun Feb 12, 2006 3:10 pm    Post subject: A200-Help Reply with quote

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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