Intercom Control Panel (INTER)
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Left console, lower section — beneath the UHF Radio Control Panel and adjacent to the IFF Mode Select Panel.
Manages internal and external communication channels, allowing the pilot to select and adjust audio sources such as intercom, radios, navigation aids, and datalinks. It also controls headset volume and provides a CALL function for crew communication.
INT, AIM, FM, IFF, VHF, UHF, ILS, TCN, HM Selector Knobs (8 total) — Individual rotary volume controls for each communication or navigation channel:
INT: Internal intercom system (crew/headset)
AIM: Airborne Intercept Missile tone audio
FM / VHF / UHF: Radio channels
IFF: Identification Friend or Foe audio
ILS: Instrument Landing System tones
TCN: TACAN navigation tone
HM: Homing beacon tone
MASTER Volume Knob (VOL) — Main audio level control for all channels.
MODE Selector Knob (INT / VHF / FM / HF) — Selects the primary transmit mode (intercom, VHF, FM, or HF).
CALL Button — Momentary pushbutton that activates the intercom call function for ground crew or internal communication.
8 × 10 kΩ linear pots (individual channel volumes)
1 × 10 kΩ for MASTER volume
1 × 4-position selector (INT / VHF / FM / HF)
1 × momentary pushbutton (CALL)
3 mm matte black acrylic faceplate, engraved white text.
Volume knobs 12–15 mm; spacing 15–18 mm for accessibility.
“INTER” engraved vertically on both edges for labeling consistency with cockpit layout.
Green LED backlighting for all text and scale marks.
Optional back-illumination behind knob markings for premium realism.
This panel interfaces directly with the A-10C’s Audio Management System, controlling which radio or navigation source is active and how audio is routed to the pilot’s headset.
In DCS-BIOS, most functions can be simulated using analog inputs for potentiometers, with digital mapping for the CALL button and mode selector.
When wiring multiple potentiometers to shift-register expanders, ensure proper ground isolation and decoupling capacitors (0.1 µF) to minimize analog noise.