[R-390] Panel meters

rbethman rbethman at comcast.net
Thu Apr 21 16:32:19 EDT 2011


Were it to be an "Ideal" world, we wouldn't have to make an opening in 
the case of the meter at all.

However, I don't really see a real way around it.

Good news is that the LEDs on the market today have a VERY long life!

Bob - N0DGN

On 4/21/2011 4:00 PM, Curt Nixon wrote:
> Yes.
>
> A very small section of 1/8 dia or smaller clear acetal rod can be 
> glued over the end after being "diffuesed" with some 400 grit wet or 
> dry so it is frosted.  Even one of those very small LED lenses could 
> be used..whatever will fit.
>
> Remember the 68-70 vintage corvettes that had fiber running into the 
> dash so one could see if all the lights outside the vehicle were working?
>
> Curt
>
> Tisha Hayes wrote:
>> You will probably need to add a blob of something to diffuse the 
>> light from the end of the fiber strand. That is a great idea, less 
>> intrusive, to use a small length of fiber to get illumination back 
>> there. After all a single strand is only 125 micrometers in size 
>> (with cladding, 62.5 micrometers when you bare it down to the glass 
>> strand). (most commonly used multimode fiber)
>>
>> On Thu, Apr 21, 2011 at 1:59 PM, Curt Nixon <cptcurt at flash.net 
>> <mailto:cptcurt at flash.net>> wrote:
>>
>>     Remember those little Christmas trees with a light in the bottom
>>     and all the branches are plastic fiber?  An LED with a couple of
>>     strands of FO on it will get into some pretty tight spots.  Makes
>>     changing the LED very easy also and only tiney holes required, if
>>     that, into the meter.
>>
>>     Curt
>>     KU8L 



More information about the R-390 mailing list