Morse TX

Morse TX encodes a text message into Morse code and transmits it in either CW (carrier on/off keying) or FM (tone-modulated) mode.

Controls

• Foxhunt (checkbox): When enabled, disables the custom message field and instead uses one of 11 pre-defined fox hunt identification codes, selected with the adjacent number field (1–11). The codes are standard ARDF (Amateur Radio Direction Finding) sequences:

  #	Code	Pattern
  1	MOE	– – – – – ·
  2	MOI	– – – – – · ·
  3	MOS	– – – – – · · ·
  4	MOH	– – – – – · · · ·
  5	MO5	– – – – – · · · · ·
  6	MON	– – – – – – ·
  7	MOD	– – – – – – · ·
  8	MOB	– – – – – – · · ·
  9	MO6	– – – – – – · · · ·
  10	MO	– – – – –
  11	S	· · ·

• Speed (10–45 wpm): Transmission speed in words per minute. The time unit per dot/dash is calculated as 1200 ÷ wpm ms. Default: 15 wpm.

• Tone (100–9999 Hz, step 20): The audio tone frequency used in FM mode. In CW mode the tone determines the sidetone pitch only. Default: 700 Hz.

• Modulation: CW (carrier keying, default) or FM (tone-modulated carrier).

• Loop: Automatically retransmits the message after the selected interval: Off, 5 sec, 10 sec, 30 sec, 1 min, 3 min, 5 min

• Set message: Opens the text keyboard to enter a custom message. The message is shown on the line above. Default message: PORTAPACK.

• Frequency / Gain / AMP: Standard TX controls in the bottom bar. Frequency is stored in persistent memory.

• TX will last: Displays the calculated transmission duration in seconds based on the current message, speed, and tone settings, updated live.

• Progress bar: Shows transmission progress. When Loop is active, shows the countdown to the next retransmission.

• Start / Stop: Starts transmission. Press again to abort.

Known Issue

Due to a timing issue in the transmitter, the first 1–2 characters of a message may be clipped or not transmitted correctly. As a workaround, prefix the message with two short characters, for example E (letter E followed by a space), before the actual content.

Settings Persistence

Settings are saved to tx_morse.ini, including message text, foxhunt selection, speed, tone, modulation, and loop interval.