Electronic morse-key:
DFM-3

• Electronic morse-key with squeeze facility
  
• Speed adjustable from the front-knob between approx. 40 ...400 lpm
  
• Additional high-speed mode for Meteorscatter between approx. 300 ... 4800 lpm
  
• Weight adjustable from the front-knob between 1:3 ... 1:5
  
• Tune facility with optimized tuning especially for tube linears. Keying ratio can be selected
  (25, 50, 75, 100 percent).
  
• Switchable pilot tone with low current consumption piezo buzzer (approx. 800 Hz)
  
• Included non-serviceable paddles with very high precision using special contact materials
  
• Paddle-distance and pressure-force can be adjusted after opening the enclosure
  
• Due to the various functions an external DC power supply (13,8Volt) is necessary.
• Current consumption is approx. 120 mA (without light fordisplay only 10 mA).
  Of course a protection against cross-polarity is included.
  

An additonal Accumulator-pack in a similar housing is availabe (DFM-3-accu).

1. Main menu

Softkey 1 -> SP = Speed adjustment using the front panel knob
Softkey 2 -> WG = Weight adjustment using the front panel knob
Softkey 3 -> off = switch off the DFM-3 - Restart by touching a paddle.
Softkey 4 -> Info = displays the info message

2. Write menu ->

Softkeys : W1 - W8 . Write to one of the 8 memories. The end of the memory can be after 12 dots automatically or after pressing the selected softkey again. This offers the possibility to program variable pauses (see also second Setup-Menu, 5.2 -softkey 7)

3. Read menu ->

Softkey: R1 - R8 . Read one of the 8 memories (can be stopped by touching a paddle).

 

4. Repeat menu ->

Softkey Rp1 - Rp8 . Continuously read one of the 8 memories (can be stopped by touching a paddle)

There are three setup menus available that can be toggled using
Softkey 4 (=next).

5.1. -> 1st Setup Menu:

Calls preadjustments "User1" (=US1) /"User2" (=US2)

Connection of paddles for right/left handed OP (=RH/LH)

Activate the output of the keyer (Out1=active,Out0=inactive)

Internal piezo buzzer (speaker) on (=SP1) or off (=SP0)

Dot memory on/off (=P0/P1), Dash memory on/off (=S0/S1)

5.2. -> 2nd Setup Menu:

• Saves "User1"/"User2" parameters tomemory (=U1/U2)
• Illumination of LCD display on/off
• Switches between HF- and VHF-Contest-Mode. In HF-Mode "9"="N" and "0"="T", in VHF-Mode "normal" operation
• End of the memory for programming:
• "12P0" = end after 12 dot lenghts automatically
• "12P1" = end has to be set manually for individual pauses
• Confirmation-beep on (QT1) or off (QT0).
  
  

5.3. -> 3rd Setup Menu (Pre-adjustments for Contest Menu)

• Edit report to be given in Contest mode (511-599 or 5nn).
• Edit the QSO number to start with (0000-9999).
  

6. Contest

• Read one of the memories 1-3 (R1 - R3) or repeat (Rp1 - Rp3)
  
• outputs the actual QSO-number and increases the number automatically
  
• outputs the present report and the actual QSO-number and increases the number
  
• Decrease / increase the actual QSO-number by "1" (for corrections)
  

7. Meteorscatter (MS) Menu

• Read one of the memories 5-8 (R5 - R8) or repeat (Rp5 - Rp8)
• Switch to MS mode (High Speed) and back to LO mode (Low Speed)

8. Tune

• Activates the tuning signal (Length of tuning can beset: 0-255 sec.)
• Keying ratio can be chosen with softkeys 5-8 (25, 50, 75 or 100 percent)
  

Additional:

• external keyer connection via 3.5mm stereo plug
• keying signal at rear cinch socket is isolated by optocouplers
• Instruction manual and power supply cables are included.
• Dimensions (without paddles) : 170 x 115 x 30 mm3