KISS703: Digital Mode for HAMs

By SV3ORA

KISS703 is a 703 Hz narrowband digital mode for amateur radio, designed for simple, low-power operation without computers. A 500 Hz pilot tone ensures frequency alignment, replaced by unique tones for 37 symbols (letters, numbers, space). Built from common discrete components, it draws about 40 mA at 12 V, ideal for SOTA/IOTA use. The receiver uses amplification, wave shaping, and a pulse-counting frequency meter for manual decoding via a calibrated meter. Transmitter and receiver calibration involves marking meter positions for each tone, enabling fully self-contained messaging with minimal hardware in portable or fixed operations.

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Operating Modes/Digital Modes

The title of the main category is Digital Modes and it deals mainly with Operating with Amateur Radio Digital Modes. The link to this resource has been on our site since Friday Aug 22 2025, and it has been followed 44 times. So far no one has rated it yet. Be the first to rate it!
Last updated: 2025-08-22

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