pl tone
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Operating Aids : History- 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: 47 | Votes: 1 | Rating: 1 ]
- Domino DF mode
- DOMINO DF is a sensitive mode which, due to its incremental frequency keying and thanks to its interleaved multiple tones sets, is easy to tune and is few sensitive to interference and ionospheric effects.
Domino faeture a great signal to noise ratio.
[ Hits: 222 | Votes: 0 | Rating: 0 ]
- NanoVNA Saver
- This software connects to a NanoVNA and extracts the data for display on a computer, and for saving to Touchstone files.
[ Hits: 361 | Votes: 1 | Rating: 9 ]
- CW Decoder
- This free windows program allows CW operators to copy CW code with a computer. The decoded CW is displayed as text or can generate a side tone. There is a spectrum display of the audio with a sliding cursor to select a particular audio for decoding. The program also allows for keying a transmitter from the keyboard with full CW break-in operation.
[ Hits: 3367 | Votes: 9 | Rating: 5 ]
- The HotPaw Morse Code Decoder
- The HotPaw Morse Code Decoder decodes the tones of Morse Code characters from audio input, and transcribes the results into text. Commercial App for MacOS X. Price USD 19.99
[ Hits: 914 | Votes: 0 | Rating: 0 ]
- DMR Contact Manager
- DMR Contact Manager is a Free software package designed to make it easy to maintain channel, zone, contact and call group information in these radios. It is fully compatible with the Ham-Digital and RadioID database systems and allows instant codeplug updates from a wide variety of sources.
DMR Contact Manager is designed for use with Connect Systems CS700/CS701/CS750/CS800/CS801/CS800D radios, as well as the Tytera MD-380/390/390GPS, TYT MD2017/MD9600, AnyTone AT-D868UV and AT-D858, Retevis RT3, and similar radios that use the RDT/RDB file formats.
[ Hits: 352 | Votes: 2 | Rating: 9 ]
- 16 DTMF Tone Generator Keypad App
- This app will give you a 16 tone DTMF keypad and the ability to generate custom DTMF sequences, and set the duration and tone to silence ratio. Includes the characters 1234567890*# and the menu tones ABCD. You may enter a custom sequence via the keypad, soft keyboard, or speech if your device already has speech-to-text capability.
This is basically a touch tone telephone keypad, which may be of interest to amateur ham radio repeater operators
[ Hits: 723 | Votes: 4 | Rating: 7.75 ]
- Stone Creek Special 600 HF RF Amplifier
- This is a Solid State Amplifier Project. It uses 4 MRF150 MosFet Power Transistors. The Power Supply Voltage is 50 VDC at 21.5 Amp. The max power available is 1,075 Watts. The Efficiency is about 65% +/- and runs Class AB Solid State.
[ Hits: 270 | Votes: 0 | Rating: 0 ]
- Arduino Iambic Keyer and Side Tone Generator
- A project to implement a simple and efficient CW Keyer and a side tone generator with Arduino
[ Hits: 610 | Votes: 0 | Rating: 0 ]
- Connect a Morse key to the Raspberry Pi
- This tutorial will show you how to connect a Morse key to the Raspberry Pi GPIO pins, and how to write code to play tones when you hold the key down. You will also decode the Morse that you're keying so that it comes up on the screen.
[ Hits: 1025 | Votes: 3 | Rating: 6 ]
- USB Rig Interface
- This project is a USB Audio, Serial and PTT interface for rigs that does not directly support digital modes provided by applications such as FLDIGI, WSJT-X and JS8CALL. Plug these interface devices into your Windows or Linux laptop or Raspbian Raspberry Pi and you can send and receive digital tones to/from your rig and automate the frequency and mode control and PTT control.
[ Hits: 319 | Votes: 1 | Rating: 1 ]
- Two Tone Generator
- A two tone generator is an essential test gear made with just four transistors that helps you evaluate your amplifiers, mixers, receivers for distortion. Distortion makes all the difference between a pleasant receiver and a horrible sounding one, between a clean transmitter and bad, splattering one on air.
[ Hits: 81 | Votes: 0 | Rating: 0 ]
- Simple 2-tone generator
- A simple 2-tone-generator for testing the linearity of SSB transmitters. This device is as simple as useful. With 2 transistors and an oscilloscope, it is fairly easy to test the linearity of your SSB transmitter. The 2-tone-method is a standardized test method that can be used to determine the maximum output and the amplification characteristics of a sideband transmitter.
[ Hits: 109 | Votes: 0 | Rating: 0 ]
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