Radio & Audio Streaming Tools

Enter an amateur radio callsign prefix to see which country or region it belongs to. Includes the ITU and CQ zones for radio operators.

Radio callsign ham radio lookup

Select a common coaxial cable type and frequency to see the signal loss in dB per 100 feet or meters. Plan your feedline with confidence.

Calculator attenuation calculator coax

Practice sending Morse code using a virtual straight key. Visual feedback and audio tone. Learn timing and proper fist.

Educational key Morse practice trainer

Use your keyboard or mouse as a straight key. Hear the tone and see the dots/dashes. Perfect for learning CW. Local.

Educational key Morse oscillator practice