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SPECIFICATIONS
DOT AND DASH MEMORIES
IAMBIC MODE FOR SQUEEZE KEYING
8 to 50 WPM SPEED RANGE
SELF-COMPLETING DOTS AND DASHES
INSTANT STARTING
BUILT-IN SIDETONE-GENERATOR
OPERATES WITH EITHER PADDLE OR
SQUEEZE KEY
DIMENSIONS 36×65×108 mm
Remove the rear panel by unscrewing two screws.
POWER INSTALLATION
Insert four standard size AA batteries (1.5 volts each) into the battery-holder. Check polar-
ity on both batteries and holder. The polarity in the holder is marked (+) and (–). Discharged
batteries will not operate keyer normally, so batteries should be checked for low voltage if at
any time the keyer appears to be operating abnormally. If the keyer is to remain unused for
longer time, you are recommended to remove batteries from the battery-holder.
The ETM-1C is CMOS equipped reducing the idling current below 1 µA. With such an ex-
tremely low drain it is not necessary to use an ON-OFF-switch.
KEY PLUG CONNECTION
Use a shielded Cinch-cable to connect the keyer to the transmitter. With a jumper on the
PCB you can choose between positive (transistor-TX) and negative Gridkeying (tube-TX).
The Dot and Dash Memories can be disabled by a slide switch on the circuit board.
PADDLE CONNECTION
Connect the key-lever with a 3.5 mm Stereo-Jack to the ETM-1C. The tip of the jack is for
the dots and the middle ring for the dashes.
SIDETONE
You can connect a headphone to pin 3 and 4 on the circuit board.
Digitalisierung und Bearbeitung von Text und Bildern durch DC7XJ im Dezember 2012
KEYING OUTPUT:
GRID BLOCK –300 V max., 20 mA max.
TRANSISTOR +65 V max., 50 mA max.
CONSTANT DASH-DOT-RATIO 1:3
POWER REQUIREMENTS 4× 1.5 V
IDLING CURRENT 1µA
KEYING CURRENT 14 mA
FRONT PANEL CONTROL SPEED
WEIGHT 190 g
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