Note
The Logikey K-3 is the successor to the K-1, representing a significant evolution in Idiom Press's lineup. While it retains the core "Super Keyer" CMOS logic and the paddle-entry command system, the K-3 was specifically designed to handle the more demanding requirements of modern amateur radio contesting and complex station integration.
If the K-1 was the "minimalist workhorse," the K-3 is the "advanced controller."
Key Features of the Logikey K-3
The K-3 maintained the same rugged, black metal aesthetic but expanded the internal capabilities significantly. It introduced more sophisticated memory management and enhanced the ability to interface with external equipment.
– Expanded Memory: The K-3 increased the number of message buffers to six (compared to the K-1's four). These are non-volatile, meaning they survive power loss without a backup battery.
– Enhanced Contest Functionality: It introduced more robust automated serial numbering, including the ability to decrement numbers (for correcting errors during a run) and "leading zero" suppression or insertion.
– User Profiles: The K-3 allowed for multiple "user" configurations, which was a boon for multi-operator contest stations where different hams preferred different speeds, weights, or keying modes.
– Push-to-Talk (PTT) Loop: One of the most critical additions was a dedicated PTT line with programmable delay. This ensures the amplifier or rig is fully switched before the first RF pulse is sent, preventing "hot switching."
After power is applied, the keyer responds with "OK" and is ready for operation. It is initialized as follows:
– Speed range: 5-40 WPM
– Load mode: character
– Weight: 50%
– Input queue: on
– Monitor: On
– Serial number: 001
– Auto-space: Off
– Emulation: Logikey K1, K3
– Function speed: Equals Paddle speed
– Monitor Tone: 700 Hertz
Note: At start-up the first time, the speed control knob should be turned fully clockwise and a few dots sent, then turned fully counterclockwise and a few more dots sent. This allows the keyer to calibrate the speed range.
Basic differences between the K-1 and the K-3:
Logikey K-1 Logikey K-3
Message Slots 4 Slots 6 Slots
Total Memory ~1,500 bits ~1500 bits
PTT Delay No Yes
Serial Numbers Basic Advanced
User Settings Single Multiple
Remote Control No Yes
Features
– Iambic keyer with dot and dash memories.
– Six active messages plus 12 "banked" messages, 1530 characters total.
– Messages may 'call' others and contain programmed functions.
– Input queue to store multiple message activations.
– Contest serial number - 001 to 9999.
– Digital and linear analog speed control - 5 to 60 WPM.
– Adjustable weight on code elements - 25% to 75%.
– Built-in adjustable frequency sidetone monitor.
– Tune function for transmitter adjustment.
– Selectable automatic character spacing.
– Timed pauses within messages.
– Message loop capability for continuous replay.
– Messages can allow break-in for paddle-inserted text.
– Emulation available for other keyers, including Curtis "A" timing.
– Ultra Speed mode allows messages at speeds to 990 WPM!
– Full beacon capability.
– Message editing capability.
– Messages and keyer configuration saved when power is lost.
– Keyer can compensate transmitter character shortening
– Requires external 12 VDC supply
