"Dual Monitor" (monitor standby frequency if nothing is being received on main frequency)
Yes
No
Yes with independent volume for main and standby frequencies
Built-in Intercom
Yes
Yes
Yes
"Say Again" Digital Playback of recent received transmissions
No
No
Yes
Minimum Voltage
9 VDC
9 VDC
8 VDC (receive) 9 VDC (transmit)
Current Draw on Standby
85 mA
50 mA
120 mA
Memory Channels
?
20
15
Speaker (standard)
4 Ohm, 6 Watt
4 Ohm, 30 Watt
4 Ohm
Microphone Type
Dynamic or Electret
Dynamic
Dynamic or Electret
Alpha Memory Description
Yes
No
Yes
Instrument panel hole size required
57 mm
57 mm
57 mm
Length (behind panel, not including connectors)
168.4 mm (6.631 in)
173 mm (6.81 inches)
138 mm (5.4 inches)
2nd Seat Repeater Available
Yes
No
Yes (ACD-57)
Antenna Connector
BNC
BNC
BNC
Stuck Microphone Timer
No
Yes
Unique Features
This is a great radio with high quality and great features. The with high quality and great features. The dual monitor mode that allows scanning of two different channels is a great feature. It has low power usage and operates down to only 9V. The RCU6201 remote head can be connected to it for use in 2 seat aircraft that allows scanning of two different channels is a great feature. It has low power usage and operates down to only 9V.
The RCU6201 remote head can be connected to it for use in 2-seat aircraft.
Extremely reliable radio with extremely low current drain. Large text display for easy in-flight reading. Extremely clear sound from standard speaker.
The "Say Again" digital replay feature is super cool! If you press it once, you hear the last incoming transmission. If you press it twice, you hear the one before that.
The optional FAA and EASA approved digital altimeter is also unique.
The ACD-57 display can also (optionally)
control a transponder like the Trig TT22.
So you get radio, transponder control, and altimeter in a single 57 mm instrument hole!
