[Elecraft] Re: K1 backlight on/off using AGC menu entry
wayne burdick
n6kr at elecraft.com
Thu Sep 15 19:27:52 EDT 2005
Sandy, W5TVW wrote:
> Wayne,
> Where is the info on using AGC on/off for turning light on and off?
> Nothing on my modification sheet about it. Also nothing on sheet
> currently at Elecraft website.
Sorry about that, Sandy. This information was actually in the e-mail I
sent announcing the backlight, not in the instruction sheet. Here it
is:
ON/OFF Control
The backlight draws only 6 to 10 mA, but you can add on/off control if
desired. One possibility is to use a switch mounted on the left side
panel. However, since most K1 owners never turn off AGC, it may be
preferable to use the AGC menu entry to control the backlight. To do
this: (1) cut the RF board trace running from pin 8 of J6 to C31; (2)
add a jumper on the bottom of the RF board from J6 pin 8 to P1 pin 18;
(3) use another jumper to connect the cathode (K) lead of the backlight
LED to pin 18 of J1 on the front panel board.
The AGC menu entry can be assigned to PFn if you don't use this switch
for XIT or some other function.
73,
Wayne
N6KR
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