https://www.ebay.com/itm/Morse-code-codec-instrument-54-code-Morse-Morse-code-CW-trainer-/182963522933 https://www.ebay.com/itm/NEW-CW-exerciser-Short-wave-radio-Morse-code-exerciser-/183021276086 i sporo podobnych na jebaju.
M
M
You can't have too many antennas...
