[Elecraft] Amber display for the K2?

[Harry Yingst]

I have a Pace de-soldering tool so taking off the display is not really an issue,
but agreed it would have been easier before the display was installed.


As for the diffuser, If needed I have a CNC mini mill so I could cut a piece of Plexiglass and I have
a nice sample pack of photography gel filters that include many colors and some various defusing films.


I was trying to avoid having to build one from scratch, That being saig I may just use it as is for a while.
After all the face of the K2 is half grey so it does not quite match the K3 as it is.


Thank you

________________________________
From: David Woolley <forums at david-woolley.me.uk>
To: elecraft at mailman.qth.net 
Sent: Thursday, April 6, 2017 5:25 AM
Subject: Re: [Elecraft] Amber display for the K2?



I'd never really thought about the colour, but I think it is basically 

the natural colour of the combination of liquid crystal and polariser. 

It's not the narrowband green that you would get with a green LED.


Especially if you add in the fact that white "LED"s are really narrow 

band blue LEDs with broadband yellow phosphors, so are not peaking in 

the green, natural variations in colour vision, or colour vision 

defects, could easily cause the colour to be treated as a yellowish 

amber, rather than a reddish green.


I would have thought using green LEDs would have been a more efficient 

use of precious milliamps.


The display is just a seven segment array and has a manufacturer's part 

number, although it is possible it is end of line.  I don't think it is 

custom, or at least not at the time of the original design.


The real problems with making the change are that the LED's are 

integrated into the diffuser and the diffuser is behind the, unsocketed, 

display.  I doubt you could change the colour, except before the first 

build, without destroying the LCD panel.  It is also possible that the 

diffuser assembly is difficult to source; there is no manufacturer's 

part number for that.


-- 

David Woolley K2 06123