Yaesu FTDX560 notes. Increase microphone gain: Change R259 from 47K to 470K (grid bias on 12AX7) On page 4 of the PDF, some text is missing on the left side. CW OPERATION Using the two contact jack supplied with the accessory pack, connect key as shown in the illustration. Most relay and automatic keyers can be connected into the transciever for break-in operation without modification, but when using reed relay or transistorised automatic keyers place 390 ohm resistor in series with key line. TUNING PROCEDURE - CW Set up transciever as described in transmitter tuning guide adjusting CARRIER control to desired power output up to maximum. After completion of final tuning, install key jack in rear port of transciever. Set MODE switch to CW and VOX-GAIN switch to MOX. The transciever is now set up for manual CW operation. After completing a transmission the VOX-GAIN switch must be returned to STBY position for receive operation. For break-in operation, simply advance VOX-GAIN control. SIDETONE ADJUSTMENT CW sidetone level may be adjusted by rotating the tone level potentiometer (VR 203) located on the main circuit board under the top cover. NOTE: Do not disturb setting of adjacent paint marked controls.