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General| Brand | Ham radio |
|---|---|
| Model | HK5A |
| Category | Radio Communication Code Keyers & Keys |
| Language | English |
Describes the HK5A Keyer as a deluxe iambic keyer with dot/dash memory, sidetone, and versatile power options.
Instructions for opening the unit, installing 4 C cells, and reassembling.
Explains connecting a squeeze-type keyer paddle using a 3 CKT 1/4 Phone Plug for dot, dash, and common contacts.
Details fabricating a cable with RCA Phono Plug for grid block or direct keying connections to transmitters.
Removes power from the keyer, extending battery life when not in use.
Keyer is operational, but sidetone is disabled for use with external sidetone.
Activates built-in sidetone; volume and pitch adjustable via front panel controls.
Switches output plugs to ON position, enabling transmitter tuning.
Adjusts keying speed from approximately 8 to 50 WPM.
Adjusts dot/dash length for keying distinctiveness; over-advancing causes constant keying.
Controls the audible volume of the internal sidetone oscillator.
Controls the pitch (frequency) of the internal sidetone oscillator.
Connects a 6V battery eliminator; automatically disconnects internal batteries.
Allows manual operation and use as a code practice oscillator with sidetone.
Describes sending alternate dots/dashes by squeezing paddles; lists 'squeezable' letters.
Troubleshooting for erratic keying due to dirty contacts or RF interference.
Using shielded cables and positioning the HK5A away from RF sources.
Installing ferrite beads on leads to mitigate severe RF problems.
Details warranty coverage, exclusions, and purchaser responsibilities.
Instructions for furnishing model number, date, place, and proof of purchase for warranty.
Schematic diagram of the Curtis 8044 based HK5A Electronic Keyer circuit.
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