Amcom II 2-Diver Standard Portable Communicators Standard Non-rechargeable with Lantern Batteries

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™  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.

Features

• 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

Amron International also offers DSP2 Helium Speech Unscramblers and Wireless Tender Options. Please refer to the Related Items Tab for additional information.

Specifications

• 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.

2 and 3 Year Extended Warranties are available for this product. Please refer to the Documents Tab for further information on these programs.

Product FAQ's:

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

Answer: 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 fuses, F1 and F2, to blow on the battery charger board and in extreme cases damage the charger circuitry. The battery charger 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.

Question: When my battery does not appear to be holding a charge, how do I know if the problem is a bad battery or if the charger is broken?

Answer: To determine whether the problem is with the battery or charger you will need to verify if the charger is properly charging the battery.

Troubleshooting: Unplug your communicator and turn on the POWER switch. Measure the voltage across the PUSH-TO-TALK (PTT) jack and write down this value for future reference. It should be greater than 9 volts. Plug the communicator into an AC source and verify that the AC POWER LED on the front panel turns on. Re-measure the voltage across the PTT jack and note it down for future reference. It should be higher than the previous measurement. If the AC POWER LED does not light up when the communicator is plugged in, then check fuses F1 and F2 on the charger Printed Circuit Assembly (PCA). Allow the communicator to charge overnight. Unplug the communicator and re-measure the voltage across the PTT jack. If it is the same or less than the voltage you measure previously, then the charger is broken and the communicator needs to be sent for repairs. If the voltage is higher than previous measurement but less than 13.5 volts, then the battery is bad and needs to be replaced. If it is greater than 13.5 volts but it still appears that the battery is not holding a charge, contact Amron for additional support.

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

Answer: 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.