This link discusses doing a switch http://www.elecraft.com/K1/k1_backlight_mod_kit.htm Phil W7OX On 7/16/14, 9:59 AM, George Averill wrote: > Does anyone have suggestions for installing the backlight mod in the K1? Which is best, 2 ma or 6 ma configuration? Has anyone installed a switch to turn it on or off? > > George