Morse Decoder AI vs PhosphorCalc

The Morse Decoder AI is an application for decoding Morse code signals using artificial intelligence. The application is designed for use by amateur radio enthusiasts for educational purposes. The Morse decoder listens to the audio stream through the microphone or line input and, upon detecting Morse code signals, decodes them into text. The neural network of the application is trained to decode signals with a speed ranging from 10 to 40 words per minute within a frequency range of 200 Hz to 900 Hz. The application supports two modes of operation: direct (default) and tone filtering mode. In direct mode, the neural network will attempt to decipher Morse code signals in the audio range of 250 Hz to 900 Hz. This mode is suitable for confident reception of Morse code at levels of 7db-9db on the S-meter. The tone filtering mode is ideal for decoding Morse code from noisy weak signals in the presence of radio interference. The audio input signal is first filtered using band-pass filters before being passed to the neural network for decoding. This mode allows for the decoding of faint signals, but it requires the accurate specification of the signal's tone frequency. Each radio amateur selects their own CW tone frequency in the transceiver settings, and it is important to tune precisely to the carrier frequency using the ZIN/SPOT button in YAESU transceivers, or the AUTOTUNE button in ICOM transceivers. There are 3 band-pass filter options available: 25Hz, 50Hz, 150Hz. If you can accurately determine the CW signal tone frequency, using the 25Hz filter, you can decode very faint Morse code signals. The application offers two neural network options: A and B, which can be easily switched in the interface. Network A is recommended for use with stable signal transmission with a constant duration of dots and dashes, while network B is recommended when using a straight key, where the duration of dots and dashes may vary. You have the ability to switch between these networks in real time and observe how each network hears and decodes Morse code. It is important to monitor the level of the incoming audio signal, for which the application provides a sound level indicator. Ensure that the signal is not too quiet or too loud. It is recommended to maintain the signal around -7db, which is sufficient for decoding. Keep in mind that higher audio frequencies are quieter than lower frequencies. Additionally, the application provides various color themes, allowing radio enthusiasts to customize the appearance of the application for comfortable use.

RF and antenna calculator for amateur radio operators. Ten standalone calculators on a clean, fast interface. Numbers in, numbers out. No network, no accounts, no subscriptions. DIPOLE Calculate half-wave dipole, quarter-wave vertical, and full-wave loop antenna lengths for any frequency. Adjustable velocity factor for different wire types. Results in both metres and feet. WAVELENGTH Bidirectional frequency and wavelength conversion. Enter either value and the other is derived instantly. Identifies standard amateur band allocations (ITU Region 1) automatically. PATH LOSS Free space path loss calculator with approximate S-meter reading context. Supports kilometres and miles. Result can be imported directly into the Link Budget calculator. COAX LOSS Feedline attenuation for seven common cable types: RG-58, RG-8X, RG-213, LMR-240, LMR-400, Aircell 7, and Ecoflex 15. Uses log-linear interpolated manufacturer data across frequency. Shows power delivered to antenna from a 100W transmitter. Result can be imported into the ERP calculator. ERP / EIRP Effective radiated power accounting for transmitter output, feedline loss, and antenna gain. Supports both dBi and dBd gain input. Shows feed power, EIRP, and ERP in watts and dBW. SWR Standing wave ratio from forward and reflected power readings, or direct SWR entry. Calculates return loss, mismatch loss, reflection coefficient, and power delivered. Colour-coded SWR indicator: green for good, amber for marginal, red for poor. POWER Ohm's law solver: pick any two of voltage, current, resistance, and power — the other two are calculated. Separate dB conversion section converts between watts, milliwatts, dBm, and dBW. LINK BUDGET Complete end-to-end signal path analysis. Enter TX power, feedline losses, antenna gains, and path loss to see received signal power in dBm and microvolts, S-meter estimate, and link margin above noise floor. Selectable receiver bandwidth: CW, SSB, FM, or Digital. LC RESONANCE LC tank circuit calculator. Solve for resonant frequency, inductance, or capacitance given the other two values. Displays inductive and capacitive reactance at resonance as a cross-check. IMPEDANCE L-network impedance matching calculator. Given source and load impedance at a target frequency, calculates component values for both low-pass and high-pass matching network topologies. Shows Q factor and network orientation. FEATURES All calculations update live as you type Tap any result to copy it to the clipboard Cross-tab import: pull coax loss into ERP, path loss into link budget Every calculator includes built-in reference notes explaining the formulae Clear and reset controls on every tab Decimal keypad input throughout No internet connection required — everything runs locally No tracking, no analytics, no data collection Part of the Phosphor radio suite alongside PhosphorRTTY, PhosphorCW, PhosphorHertz, and PhosphorSol.