[Elecraft] Amber display for the K2?

[David Woolley]

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

On 05/04/17 22:15, Don Wilhelm wrote:
> Tom,
>
> The LCD display on the K2 has "been what it was" from the beginning
> (even for Field Test units).
> The backlighting is white (LEDs, not incandescent), but the color of the
> actual display is green when backlighted.  Actually, it is green when
> frontlighted (without the backlight) as well, but more gray than green.
>
> There is no amber LCD for the K2, never has been.  I think some posters
> confused K2 with the KX2 (which does have an amber LCD - same LCD as the
> K3/K3S and the KX3).
>
> The LCD display is a custom display, so duplicating that custom display
> for someone who wants an amber display would be quite an expensive
> proposition.  In other words, an amber LCD for the K2 is not practical.
>