![]() The picture on the right shows the comparison between the original MH-31 PCB left and the first prototype PCB right while above left you can see the final PCB. Basically it is nothing else than the SBVK but with a few design changes concerning how the ISD 1760 voice chip is controlled (using the SPI interface) and how audio is transferred to the transceiver. So I could develop a replacement PCB containing all needed components for a voice keyer. And no additional weight as the used components weigh less than the original innards of the used microphone.Ĭhecking standard transceiver microphones available today I quickly discovered that the Yaesu MH-31 hand mic would be an ideal candidate for this project as it’s few components are soldered on a PCB that can be taken out. These where the reasons why I decided to develop something entirely new and not available on the market yet – a voice keyer completely integrated into a standard fist microphone! So no additional box as you need the microphone anyway. Even for home use some might prefer not to have an additional external box that needs to be wired and takes up precious space on the operating desk. ![]() ![]() But what to use when go hiking or being mobile? Due to weight (hiking) or security (mobile) reasons an external box is probably not the right solution. ![]() Especially the FA station manager with it’s 4 voice memories, built-in CW keyer and sequencer is a versatile tool but rather designed to be a fixed or table portable station accessory. The SBVK and FA-SM solutions featured on this website are good solutions to full-fill that task. Therefor many seek for external solutions. There are not many transceivers having such a nice feature built-in. Polish Youtube video presentation by SQ6NEJ. Short Spanish video by EC4TR.Īmateurs wanting to save their voice during CQ calls know the advantages of voice keyers, also called CQ parrots. Video review in Slovenian by S53K.ĭG2IAQ video test with FT-817. Features a 60 character memory, setup & message entry using a paddle and no battery is required to retain the memory.ģD Printed Projects Alternative Power Amplifiers Antenna Launcher Antenna Rotator Antenna Switch APRS Arduino Attenuators ATV Audio Batteries Beacon keyers Calculators CB Radios Coax Cables and Connectors Components Digital ATV projects DTMF Dummy Loads Duplexers Electronics Filters Frequency Counter Grounding Ham Radio Go Kits Headsets and Speakers HF Radios Homebrew Key Clicks Keyers* Lightning Protection Mic wiring Microphones Mircrowave Morse Code Decoder Morse Code Oscillator Morse Keys Pan Adapter Power Meter Power Supply Preamplifiers Programming Radio QRM Eliminator QRP Projects Radio Direction Finding Radio Frequency Interference Radio Mods Radio Programming Cable Raspberry Pi Receiver Front-End Protector Receivers Repeater RF Design RF Safety RF Signal Generators Scanners Software Defined Radio Soldering and Desoldering Sound Card Radio Interfacing Spectrum Analyzers Standing Wave Ratio SWR Meters Test Equipment Transverters TVI Filters Vacuum tube Vector Network Analyzer VHF Radios WiFi Search The DXZone.Now available stateside, too – click here!īuild review by G1YBB. Home made keyer with 8 memories, auto spacing, adjustable speed & weighting, separate paddle and key inputs, beacon mode, positive or negative keying, fuse, extremely low power requirements, and a bullet proof housing by AA5TB The circuit is very simple and takes power supply from the ACC port of the radioįunctional, easy, and cheap, all good Ham Radio characteristics by Terry Fletcher, WA0ITPĪ simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency. Homebrew it with the free firmware and public circuit diagram. OH7SV ultimatic type keyer with Dit priorityĪn external keypad for FT-817(ND), for the serious portable/field-day contester/operator. It is built with a microcontroller PIC16C711. The PIC-MORSE is an electronic iambic keyer, integrating a generator of Morse code and a sidetone. It can be used as a voice-keyer with Contest Voice Blaster and as a voice-keyer and CW-keyer with Writelog. This voice-keyer-interface connects between a Yaesu FT1000MP and a PC's sound card & COM port. This iambic keyer uses a PIC16C84 or PIC16F84 microcontroller to generate the dot/dash timing and key the transmitter. Although this circuit is not a true iambic keyer, it is capable of producing perfectly sounding CW. Based on the famous Curtis family of morse keyer chips and has a proven record of dependability.Ī simple keyer which can be built for as little as $6 with some junk box parts.
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