TX Controls

TX Controls

TX Applet

• Fwd Power gauge (0-200W barefoot, 0-2000W with PGXL)
• SWR gauge (1.0-3.0)
• RF Power slider (0-100%)
• Tune Power slider (0-100%)
• TX Profile dropdown — select saved TX profiles
• TUNE — transmit a steady carrier for antenna tuning
• MOX — manual TX (push-to-talk via GUI)
• ATU — activate internal antenna tuner
• MEM — use ATU memory
• APD — Adaptive Pre-Distortion (Active/Cal/Avail indicators). On FLEX-8000-series radios running fw 4.2.18+, APD also supports External APD: pick a sampler-port input via the sub-menu so the radio can train its predistortion against the output of an external linear amplifier rather than its own internal PA.

P/CW Applet (Phone/CW)

• Mic level gauge (-40 to +10 dB) with peak hold
• Compression gauge (reversed red fill with slow decay)
• Mic profile dropdown — select mic profiles
• Mic source — MIC, BAL, LINE, ACC, PC
• Mic level slider (0-100)
• +ACC — accessory input toggle
• PROC — speech processor (NOR/DX/DX+)
• DAX — DAX audio toggle
• MON — monitor + volume slider

PHONE Applet

• AM Carrier slider (0-100)
• VOX toggle + level + delay
• DEXP — downward expansion (not functional on fw v1.4.0.0)
• TX Filter — Low Cut / High Cut step buttons

EQ Applet

• 8-band graphic equalizer (63 Hz – 8 kHz)
• ±10 dB vertical sliders per band
• Independent RX and TX views
• ON toggle + reset button

TX During Operation

• Press TX button (or use MOX) to transmit
• The VFO marker turns orange/red during TX
• Waterfall automatically switches to FFT-derived rows during TX
• The waterfall resumes native tiles when returning to RX

Aetherial Audio Channel Strip

The full TX (and RX) DSP stack — gate, EQ, de-esser, compressor, tube saturator, AetherVoice exciter (EVO), reverb (TX-only), and final output stage with brickwall limiter, DC block, test tone, and Quindar tones — lives in the Aetherial Audio Channel Strip window. Open it from Settings → Aetherial Audio Channel Strip or by double-clicking any tile in the CHAIN applet.

See Aetherial Audio for the full stage reference, parameter guide, and per-side chain ordering.

Quindar Tones

The Final Output stage (TX side) includes a QUIN chip that emits the Apollo-era K/BK chirp on PTT engage and disengage — 2525 Hz "intro" → operator audio → 2475 Hz "outro" → unkey.

Right-click the chip to open the editor:

• Style — Tone (classic chirp) or Morse (keyed K / BK)
• Level — -20 to 0 dBFS
• Tone fields — Intro / Outro frequency (2400–2700 Hz), duration (100–500 ms)
• Morse fields — WPM (20–60), pitch (400–1200 Hz)
• Test intro / Test outro — audition through a dedicated local sink without flipping MOX