tone circuit

tone circuit

Manufacturers : Parts and Surplus

• Sunstone Circuits - Sunstone Circuits is your easiest source for quoting and ordering printed circuit boards online. We are three respected brands in one: PCBexpress quickturn boards, PCBpro.com full-featured and design-checked boards, and PCB123 design software.
  [ Hits: 691 | Votes: 3 | Rating: 8 ]

• Evolution of Car Radios: From Marconi to Motorola - his historical account traces the development of car radios from Marconi's mobile wireless telegraph station on a steam engine vehicle in 1901 to Motorola's iconic car radio models in the 1930s. It highlights key milestones such as Alfred Grebe's radio-telephone experiments on Long Island and the introduction of Marconi-Phone 8 radios by the Daimler Company in England. The narrative explores technological advancements, including the transition from TRF to Super-Heterodyne circuitry and the integration of push-button controls. The evolution from vacuum tubes to transistors and compact discs is also documented, showcasing the continuous innovation in automotive entertainment systems.
  [ Hits: 51 | Votes: 1 | Rating: 1 ]

• TCube - TCUBE is a combination of a Spectrum Analyzer and a Two Tone Generator, with optional quadrature outputs. It can be used for measuring the intermodulation behavior of an audio circuit, and as a general purpose tool
  [ Hits: 8517 | Votes: 11 | Rating: 5.91 ]

• CTCSS DTMF Tone Decoder and Encoder - CTCSS Decoder and Encoder, DTMF Decoder projects
  [ Hits: 1833 | Votes: 5 | Rating: 3.4 ]

• DRAKE TR7 Downloads - Circuit diagrams drake tr7, Schaltbilder Drake Tr7, antenna tuners, baluns, and home brew power supplies, dual tone ssb test generator, zweiton ssb test generator, zweiton testgenerator, dual tone test generator by DK4DDS
  [ Hits: 1757 | Votes: 4 | Rating: 7.25 ]

• A CW Sidetone Bypass - A CW sidetone bypass for the NESCAF audio filter, a small and low cost circuit that works great.
  [ Hits: 482 | Votes: 0 | Rating: 0 ]
• Automatic Roger Beep for VHF/UHF Contests  ^new - This project details an automatic roger beep circuit for VHF/UHF contests. Built around a Microchip PIC microcontroller, the design detects PTT (Push-To-Talk) activation and generates a brief tone upon release, mimicking a "roger beep" to signal the end of transmission. The circuit utilizes readily available components and includes downloadable resources for PCB layout and firmware.
  [ Hits: 23 | Votes: 0 | Rating: 0 ]

• FM Morse Code Keyer - A 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.
  [ Hits: 2136 | Votes: 3 | Rating: 3.33 ]

• Sound Card Interface with Tone Keyer - An improved version of the audio interface commonly used to connect a computer soundcard to a transceiver\'s receive and transmit audio circuits
  [ Hits: 402 | Votes: 0 | Rating: 0 ]