I made my own backlight for my K1 before the Elecraft version came out.
It was actually more of a sidelight, but it works fine. I took a white
LED, sanded the plastic case to make it more diffusive, and fed it off
the 12 volt buss with a current source made from a gate-source connected
FET. It wasn't difficult to do.
I don't remember which FET I used, but an LM334 (very inexpensive TO-92
current source IC) and a 1/4 watt resistor would work even better, and
today's LEDs are certainly much brighter than the ones I had available
back when I did this. Better choice of colors as well. ;)
73,
Dave AB7E
On 12/4/2021 8:57 AM, Don Wilhelm wrote:
Ken,
The K1 LCD backlight is no longer possible. The original used half of
the K2 backlight strip which is no longer available and the new K2
strip is too thick to fit under the K1 LCD.
73,
Don W3FPR
On 12/3/2021 11:39 PM, Ken Brown wrote:
Need the best modifications for back lighting of the K1.
This version never had the K1 LCD Backlight Kit.
Ken
Elecraft K1 nr. 260
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