Request a Quote

Please fill out the following form below.

AMCOM II 2820A 2-Diver Standard Non-Rechargeable Portable Communicator REFERENCE ONLY

SKU: OBS-2820A Rate this product

    Availability: Not Available

    Click to Enlarge Image


    This item number has been replaced by 2820A-01



    • 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 pre-amplified 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)


    • Audio Power Output 20 Watts per channel
    • Frequency Response 500 Hz to 3 kHz
    • 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 110/220 VAC 50/60 Hz (automatic sensing), or Internal/External Batteries 12 VDC

    Amcom ™ II 2-Diver Standard Non-Rechargeable Portable Communicator - P/N: 2820A Includes:

    • (4) 6 VDC Spring-Top Dry Cell Non-Rechargeable Batteries - P/N: 2890-03 - Expected life: 40 hrs
    • (1) User Manual

    Tech Note:

    All communicators will transfer topside noise to the diver when using the radio speaker only. To eliminate background noise and achieve clear communications, use a Push-to-Talk microphone, headset, or a Remote Walk-and-Talk with a headset.

    2 and 3 Year Extended Warranties are available for this product. Please refer to the Attachments tab for further information on the warranty programs.

    Note: Amron reserves the right to change the battery brand at any time without notice.


    This item number has been replaced by 2820A-01


    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).

    All Amcom ™ II series communicators have Push-to-Talk and separate isolated inputs for each diver. The Amcom ™ II Series portable communications system delivers 20 watts "voice power"; operating from internal batteries or external 12 VDC power source. Models with the /23 or /24 option can be operated from either a 110/220 VAC, external 12 VDC power source, or an internal 12 VDC battery. All Amcom ™ II Series communicators have the capability of 2-wire and/or 4-wire communication modes. 2-Wire and 4-wire modes can be used simultaneously.

    The Amcom ™ II Series communicator 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 pre-amp 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.

    Note: Amron reserves the right to change the battery brand at any time without notice.


    Additional Information

    Search Weight 75
    Brand AMCOM II
    GSA No
    DOD No
    Clearance Item No
    Communication Mode 2-wire/4wire
    Video No

    Product FAQ's

    Ask a Question

    • Can you stack the banana plugs from the diver's communicator cable so you can have two divers on each diver channel?

      Although it may be possible, we strongly discourage such operation. The added workload would cause overheating and stress to the amplifier card. Prolonged use in this condition will eventually cause permanent damage and failure to the amplifier card.

      How helpful was this information?

    • What type of cable do I need to connect my Amron communicator to my Outland video system?
      Amron communicators and Outland Technology’s video systems have a RCA Phono Jack. To connect the two systems together, you will need an audio cable with RCA Plugs on each end.
      How helpful was this information?

    • Should I use a GFI when operating my radio off AC power?

      When operating your Amron Diver Communicator on AC, it is critical to use a Ground Fault Circuit Interrupter (GFCI) or isolation transformer for tender and diver safety. Surges and spikes are common on AC lines found on ships, generated locally, or at the end of long extension cable runs and can exceed 1kVolt. Such surges and spikes can cause the fuse to blow on the amplifier card assembly. The power supply is designed so that such a failure will be isolated and will not cause a safety issue to the tender or divers. It is strongly advised that your Amron Diver Communicator be operated on an AC circuit with a high quality surge arrester or an AC isolation transformer.

      How helpful was this information?

    • Can I convert my 2820A Communicator with non-rechargeable batteries to a rechargeable battery with external charger communicator?
      Yes, on the PC card there is a black jumper (J14) that you would move from the “N” side to the “R” side (next to the J14 number printed on the PC card). Also you need to move the RED (battery positive) wire on the J1 connector from PIN 1 (non-rechargeable) to PIN 2 (rechargeable). Please refer to the diagram in the Attachments tab named 2825A Non-Rechargeable to Rechargeable Battery Diagram.
      How helpful was this information?

    • What is the electrical protection (IP) rating on the AMCOM II 2820A Communicators?
      2820A Portable Series: Case Closed – IP67, Case Opened – IP66.
      How helpful was this information?

    • How do I install a new microphone in my Amcom II or III Communicator?
      Please refer to the Panel Microphone Installation instructions located in the attachments tab.
      How helpful was this information?

    • Why does the speaker on my communicator sound muffled?
      The simplest way to fix this issue is to unplug the red banana plug from the red microphone 5-way binding post on the communicator and rotate it 180 degrees then reinstall it. This should fix your problem. For a more detailed explanation of what happened, please read below. The issue is not with the communicator, it is with the wiring of the umbilical. There is always the potential for wiring the speakers and microphone out of phase, similar to wiring the speakers on a car stereo system. There is an orientation to the banana jacks and they should be wired for proper phasing with the communicator. A banana plug does have an identified ground side marked on the plug. Amron always sets up their umbilicals so that the ground side is located on the left side so the user can consistently plug in their umbilical and avoid phasing issues. If a banana plug is plugged upside down or is wired out of phase, the sound quality will be significantly reduced. If the phasing is out and the orientation of both plugs are the same, then the banana plug wiring should be reversed on “only one plug” to avoid this issue again. It does not matter which plug you choose to reverse the wiring on.
      How helpful was this information?

    • How can I test for a blown fuse on my Amcom series communicator?

      If the unit is plugged into a live outlet and turning on the switch does not cause the AC POWER LED to light up, then the fuse(s) are probably blown. Unplug the unit from the outlet, remove the fuses and check continuity with a multimeter. Replace any fuse that does not show continuity.

      How helpful was this information?

    • Can I operate my communicator while I’m charging the internal battery?
      Yes, however, the charger will charge the battery at a slower rate as some of the charger power is being used to operate the communicator.
      How helpful was this information?


    Customers Who Viewed This Item Also Viewed