Firmware Version 1.21
2/2/2010
6
Setup and Installation
Figure 1 - Rear panel
Power
Power is supplied via the
POWER
jack on the rear panel. This can be connected to a
source of DC power commonly used in the ham shack – 12V to 13.8V DC is fine.
However, the power supply will handle any DC or AC power source producing at least
9V, but not more than 20V, with current capacity of 300 milliamperes or more. When
using a DC power source, the polarity of the connector is not important. A power cable
with the correct power plug is included with your MK-1 keyer.
When power is connected and the
ON/OFF
switch in the ON position, the red front panel
POWER
LED should illuminate.
Paddle and Optional Straight Key Connections
For normal use, a paddle is plugged into the 3.5mm stereo jack on the rear panel marked
PADDLE
. Either a single- or dual-lever paddle may be used. The normal method of
wiring the paddle is with the dot contact wired to the tip of the stereo plug, dash contact
to the ring, and the common or ground connection wired to the sleeve. The dot contact is
normally that which closes when you move the paddle with your thumb – toward the
right for right handed people, or to the left if wired for left handed operation.
If your paddle has its dot and dash contacts wired the opposite way, or if you wish to
swap the paddles for opposite handed operation, the paddles can quickly and easily be
swapped without re-wiring the plug. This is done from the command interface using the
‘
P
’ command (see the PADDLE COMMAND MODE section).
