[Elecraft] Using the 10th LED of the S-meter for CW Tuning Indicator

[Tom Hammond]

Hi Folks:

Although I've been making and selling two different designs of LED CW 
Tuning Indicator (both the KR5L and K6XX designs) for several years, I've 
never installed one myself, so I have little experience along that line.

I'd appreciate hearing from those of you who HAVE installed one of these 
devices, and more specifically those of you who have implemented use of the 
right-most (10th) LED of the K2's 10-segment LED S-meter as the tuning 
indicator LED.

 From looking at the schematic, and the PC board layout, it appears that 
such an implementation should only require that the indicator PC board be 
grounded and that the LED line (pin 8 of the NE567 in the KR5L 
implementation, and pin 5 of the XR-2211 of the K6XX design) from the 
decoder be connected to pin 20 of the LED array. I'd greatly appreciate a 
confirmation on this wiring 'theory' before I attempt to draw up a set of 
installation docs.

Also, please indicate where you went to connect to the AF output of the K2 
and whether you made any attempt to obtain a fixed-level output to drive 
the tuning indicator.

Thanks for your time and assistance.

73,

Tom Hammond    N0SS