Da key intermittently failing

[hcarter333]

Since the attachment of the headphone jack and(?) the band/keyer-speed switch to the control RF-45 unit, the da key occasionally does not make das when closed. May be related to #10

[hcarter333]

The failing da tone was caused by a loose screw connection:

To fix this, solder both the da and di wire to the breakout board. There's a temporary fix that's already done of placing the wire back into the screw terminal.