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A simple keyer which can be built for as little as $6 with some junk box parts. Although this circuit is not a true iambic keyer, it is capable of producing perfectly sounding CW.

Unified Microsystems presents a range of amateur radio products, notably the **XT-4 MK2 CW Memory Keyer**, a battery-powered iambic keyer designed for portable operations like Field Day, POTA, SOTA, and DXpeditions. It features four non-volatile memories, each storing approximately 240 Morse characters, and operates at speeds from 8-45 WPM. The XT-4 MK2 also includes an auto power save function and paddle reverse, making it adaptable for multi-operator setups. Beyond the XT-4 MK2, the site details the **W9XT Contest Card**, a PC plug-in board offering DVK and CW interface capabilities, allowing operators to record and playback CQs and contest exchanges. Other offerings include the BevFlex-4X RX Antenna System, RAS-4 RX Antenna Switch, VK-64 Voice CW Keyer, and various USB interfaces. Additional products cover electronic development, such as the ATS-1 Terminal Shield for Arduino™ and VR-X Power Supply Voltage Regulators, demonstrating a broader scope beyond just operating accessories. The XT-4Beacon MK2 / CW IDer is also highlighted for beacon projects, capable of storing messages up to 5 minutes at 25 WPM.

Iambic keyer with simple paddles and simple electronic circuit.

The PIC-MORSE is an electronic iambic keyer, integrating a generator of Morse code and a sidetone. It is built with a microcontroller PIC16C711. In French

Document explaning the differences between Iambic mode A and B

UK manufacturer of ham radio accessories, including TNX, SDR receivers, RF Diplexers Triplexers, bandpass filters, iambic memory keyers.

A home made iambic Squeeze electronic keyer

Lego MindStorms Iambic Keyer and Paddle Project by N9SSA

Very simple iambic keyer with only two chips

The m0xpd keyer project utilizes a PIC16F628A microcontroller, offering Iambic A and B modes, adjustable speed from 5 to 40 WPM, and variable weight control. It incorporates a sidetone generator with adjustable frequency and volume, along with a PTT output for transceiver control. The design includes a 16-pin DIL IC socket for the PIC, a 3.5mm stereo jack for the paddle, and a 3.5mm mono jack for the PTT output. Powering the keyer requires a 9V DC supply, which is regulated down to 5V for the PIC. The circuit board layout is designed for through-hole components, facilitating home construction. A detailed schematic and a parts list are provided, guiding builders through the assembly process. The project also discusses the firmware programming for the PIC16F628A, essential for the keyer's functionality. Construction details cover component placement and wiring, ensuring proper operation. The keyer's compact size makes it suitable for portable or shack use, providing a reliable CW interface.

Two cheap CMOS ICs and a few transistors was all that was required to rebuild an elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer.

Marshall G. Emm, N1FN, meticulously examines iambic keying, dissecting its historical introduction in the late 1950s with transistorized electronic keyers and its purported advantages. The resource defines keying systems, electronic keyers, and various paddle types, including single-lever and dual-lever paddles, clarifying the distinction between iambic keyers and the iambic sending technique itself. It details the two main types of squeeze keying: true squeeze for alternating dot-dash strings and character insertion for specific elements within a character. N1FN critically evaluates the actual efficiency gains of iambic keying, referencing Chuck Adams, K7QO's, keystroke analysis. While a straight key to bug transition yields a 34.1% reduction and a bug to non-iambic keyer offers 16.1%, iambic keying provides only an 11% theoretical improvement. However, considering typical QSO text and Morse code's inherent optimization for common letters, the practical efficiency gain is estimated at a modest 4-6%. The article also highlights how iambic keying's reliance on precise timing gates can impose a speed limit, making it less effective above 40 WPM, where many operators revert to non-iambic methods or single-lever paddles.

A project to implement a simple and efficient CW Keyer and a side tone generator with Arduino

Free Windows program intended to be used as a training aid for sending CW using an iambic Winkeyer from K1EL Systems. Iambic Master operates as a game. The objective of the game is to send the text in the Target box as accurately as possible.

Iambino is a Iambic Keyer for Arduino running hardware containing an ATmega328 or ATmega32u

Build your own 3-IC Iambic Electronic Keyer. Here, you will find schematics and operation descriptions. Includes Dot/Dash Memory, Progressive Element Weighting

The author recounts their journey in ham radio, including the initial experience with Morse code. Now retired, he has rekindled his interest in ham radio and CW. Here share his project of constructing an Iambic Keyer with Arduino. The project includes a memory keyer and speed adjustment. Additionally, the author provides resources for an Arduino enclosure available on Thingiverse, enhancing the project aesthetics and functionality.

SW Keyer for remote operations. This is a simple tool based on the Morse Code Iambic and Semi-Automatic Keyer from the Morse-Code-Tools projects. You can use your key, bug or Iambic Paddle stright connected to your personal computer without a hardware morse keyer.

Load Sensor add-on iambic paddles for Morserino-32 and K3NG keyer. Open source with aim to provide affordable high quality paddles without specialized mechanical skills.

Learn how to create a USB Keyer for PowerSDR to enhance your CW experience. This article provides a step-by-step guide using affordable materials like a USB to TTL Module (FT232RTL) and a Keyer iambic. The tutorial includes a detailed wiring diagram and instructions for configuring the Keyer in the PowerSDR menu. The author also shares a helpful video demonstration to ensure smooth operation. Whether you're a seasoned ham operator or new to CW, this DIY project can improve your radio setup. Follow these instructions to build your USB Keyer and elevate your PowerSDR experience.