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General| Type | Electronic Keyer |
|---|---|
| Power Supply | 9V Battery |
| Connector | 1/4 inch phone jack |
| Material | Plastic |
| Weight | 0.5 lbs |
| Features | Built-in speaker, adjustable weight |
Details on powering the MFJ-401B with batteries or external supplies and connecting keys.
Instructions for connecting iambic or straight keys, including plug configuration.
How to connect for gridblock and solid-state transmitter keying.
Instructions for activating the unit, adjusting speed, volume, and tone controls.
Explanation of automatic, semi-automatic, and bug operation modes and dot memory.
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