[Elecraft] Diode Matrix for Band Out on K3

[Dave Hachadorian]

Here's a great inexpensive band decoder:
http://www.unifiedmicro.com/decoder.html

The outputs are open collector. If you need a 12vdc source 
instead, you will need to have a line driver or relay for each 
output.

Older K3's will require the External Band Data Pullup part of the
K3 Negative ALC and Ext Band Data Pull-up Mods in order to work 
with this unit. Or, you can buy a REMIOUPGD modified KIO3 Board 
from Elecraft for $20.

Newer K3's are good to go with no mods.

Dave Hachadorian, K6LL
Yuma, AZ