Submarine Manufacturing & Products Limited

The Amcom™ II Series 2820A diver communication radio system is a full featured hard wire, two diver communicator. The 2820A models have a single earphone volume control for diver's volume (down-link) and a single volume control for the tender (up-link).

This hard-wire 2 diver communicator has push-to talk and separate isolated inputs for each diver. It is a portable system delivering 20 watts "voice power"; operating from internal batteries or external 12 VDC power source. Models with the /24 option can be operated from either a 110/220 VAC , external 12 VDS power source or an internal 12 VDC battery. This radio has the capability of 2-wire and/or Simulcom (4-wire) communication modes. 2-Wire and Simulcom (4-wire) modes can be used simultaneiously. This portable diving radio has the ability to work with both dynamic and pre-amplified microphones in either 2-wire or 4-wire modes. The circuit detects the type of microphone that each diver is using then automatically switches from the preamp mode to dynamic mode, adjusting the specific diver's gain (volume). The tender's volume is set louder than the diver's volume. This allows the tender to hear the diver in a noisy environment while maintaining the diver's volume at a comfortable level.

• Single volume control for both divers
• Both divers can be set up on 4-Wire Mode or 2-Wire Mode or any combination of the two modes
• Ability to use both dynamic and preamplified diver microphones with a unique circuit that detects microphone type and automatically adjusts volume levels
• The divers connections consist of cross-talk and separate speaker and microphone inputs
• Weatherproof panel microphone for greater voice intelligibility
• Communicator can be left on charge indefinitely without damage to the batteries or communicator (/23 and /24 versions only)
• Communicator can be operated directly from the charger where AC power is available (/23 and /24 versions only)

Non-Rechargeable: Part Number 2820A Includes

• (4) 6VDC Spring-Top Dry Cell Non-Rechargeable Batteries: Part Number 2890-03 - Expected life: 40 Hrs
• User Manual

Rechargeable with External Charger: Part Number 2820A/23 Includes

• (4) 6VDC Gel-Cell Spring-Top Rechargeable Batteries: Part Number 2890-04 - Expected life: 40 Hrs
• External Battery Charger: Part Number 2823-602
• User Manual

Rechargeable with Internal Charger: Part Number 2820A/24 Includes

• (1) 12VDC Slide Terminal Gel-Cell Rechargeable Battery: Part Number 2890-05 - Expected life: 20 Hrs
• User Manual

• Audio Power Output: 22 Watts per channel
• Frequency Response: 300Hz to 12kHz
• Isolation Transformer: Split Bobbin Medical Grade
• Dimensions: 10 in. H x 9 in. W x 14.5 in. L (25.4 cm x 22.9 cm x 36.8 cm)
• Weight: 20.3 lbs (9.2 kg)
• Power: 110/220VAC 50/60 Hz (automatic sensing), or Internal/External Batteries 12VDC

Tech Note

All communicators will transfer topside noise to the diver when using the radio speaker only. To eliminate background noise and achieve clear concise communications, use a push-to-talk microphone or a headset or a remote walk & talk with a headset.