MFJ-422D/422DX Instruction Manual
Electronic Keyer Paddle
2
8. The
Iambic Type A/B
mode is also set inside the unit with a jumper. The unit is factory set
for Type "A" Iambic. If you prefer Type "B" Iambic, remove the paddle to access the jumper.
Locate jumper JMP3 behind the power jack (J1), between JMP1 and JMP8; set it to the "B" po-
sition. For Type "A" Iambic, set the jumper to the "A" position.
Note: Power must be off when changing the jumper settings.
When a squeeze is released during an element (dot or dash), type "B" adds the opposite ele-
ment. Type "A" just finishes the element in progress and does
not
produce a following alter-
nate element. For example, in Type "A" Iambic, a squeeze release during the "dah" in the letter
A will produce "dit dah" (A). In the Type "B" Iambic, a squeeze release during the "dah" in the
letter A will produce "dit dah dit" (R).
Paddle Installation for the MFJ-422DX
If you purchased the MFJ-422DX (keyer without paddle), you must install it onto your paddle. Fol-
low these instructions for installing the MFJ-422DX onto a MFJ-564 or Bencher type paddle:
1. Remove any cables from the paddle. Do not apply power to unit while it is disassembled.
2. Set up your MFJ-422DX now, using the four internal jumpers, to the type of output keying re-
quired, the desired Imabic mode, and the speed range. Refer to items 3, 7 and 8 of the pre-
vious section for locations and meanings of these jumpers; also, refer to the "Jumper Settings"
section on page 3 for the meanings of these jumpers.
3. If you wish to use a nine volt battery, install one now. A nine volt battery fits in the battery clip
located inside the case. MFJ suggests the use of a good long-life alkaline battery for longest
operation.
4. Remove the rubber foot from the bottom rear of the paddle.
5. Remove the plastic cable clamp from the bottom center of the paddle.
6. Slide the MFJ-422DX on the back of the paddle. Thread the cable through the slot on the bot-
tom of the MFJ-422DX. Secure the case with the rubber foot and new screws. The MFJ-564
Iambic Paddle has four additional holes to better secure the case of the paddle.
7. Connect the BARE wire of the cable to the middle terminal on the bottom of the paddle for
GROUND.
8. If you normally operate the paddle
right-handed
, then connect the DOT (white or clear col-
ored) wire to the
left
paddle terminal and the DASH (black) wire to the
right
terminal. Connect
the wires the opposite way if you operate the paddle
left-handed
.
9. Place the cable in the plastic cable clamp and secure it with a screw. Fold any excess cable into
the unit.