Product Overview

The Williams AV CHG 3512 is a 12-bay drop-in body-pack charger for assistive listening receivers and transmitters used in commercial venues. It recharges up to 24 AA NiMH batteries while they remain installed in docked Williams AV body-packs, eliminating battery swapping and keeping a receiver fleet organized at a central charging station. For facilities running FM, infrared, or hearing loop assistive listening systems, the CHG 3512 streamlines nightly device turnaround.

Product Description

The CHG 3512 supports the PLR BP1 loop receiver, PPA R37 and PPA R38 FM receivers, PPA T46 FM transmitter, and WIR RX22-4 infrared receiver so a single charger covers mixed inventories across Williams AV product families. Each of the 12 bays accepts a body-pack with two AA NiMH batteries installed, charging up to 24 cells simultaneously without opening a single battery door.

The charger is microprocessor controlled and runs a timed 16-hour charge cycle at 140 mA, then drops to a pulse/maintain charge once the timer completes. That means receivers can live in the charger between services or training sessions and always come off the rack ready. Per-bay red LEDs remain lit during charging and blink when batteries reach full charge, giving staff immediate visual confirmation of system status. The compact 9.5-inch ABS chassis fits on a shelf, credenza, or equipment room counter, and the included TFP 037 switching power supply accepts 90-240 VAC.

If the system travels between sites, the CHG 3512 PRO with carry case adds transport protection. For smaller deployments, the CHG 3502 2-bay charger handles a pair of body-packs.

Key Features

• 12-Unit Drop-In Design Charges up to 24 AA NiMH batteries while installed in 12 docked body-pack receivers or transmitters.
• Broad Body-Pack Compatibility Supports PLR BP1 loop, PPA R37/R38 FM, PPA T46 FM transmitter, and WIR RX22-4 infrared units from one station.
• Timed Charge with Maintain Mode Microprocessor-controlled 16-hour cycle transitions to pulse/maintain charging so devices stay docked safely.
• Per-Bay LED Indicators Red LEDs stay lit while charging and blink when batteries are fully charged for at-a-glance readiness checks.
• Compact Footprint Measures 9.5″ x 7.4″ x 1.7″ in black ABS, fitting easily on counters and equipment shelves.
• Universal Input Power Supply Includes the TFP 037 switching adapter (90-240 VAC in, 5 VDC / 4 A out) and US power cord.
• Regulatory Compliance CE approved and compliant with RoHS and WEEE regulations.

Typical Applications

• House of worship
• Government space
• Auditorium
• Training room
• Conference room
• Multi-purpose room

Technical Specifications

Frequently Asked Questions

Which devices can I charge in the CHG 3512?

The charger supports Williams AV 3V body-packs including the PLR BP1 loop receiver, PPA R37/R35-8/R36/R863 and RX22-4 style receivers, and PPA T36, PPA T46, PFM T36, and T863 style transmitters with AA NiMH batteries installed.

Does it work with alkaline batteries?

No. The CHG 3512 is designed for rechargeable NiMH batteries only, and compatible devices should be set to their NiMH battery setting before docking.

Can body-packs stay in the charger overnight or longer?

Yes. After the 16-hour timed cycle, the charger switches to a pulse/maintain mode that keeps batteries topped off, so units can remain docked until needed.

How do I know when charging is complete?

Each bay’s red LED stays lit while charging and blinks once the batteries in that unit are fully charged.

Is a power supply included?

Yes. The package includes the 12-bay charger, the TFP 037 switching power supply (90-240 VAC input), and a US main power cord (WLC 004).

What warranty does Williams AV provide?

The charger carries a 1-year warranty; cables and the power supply are warrantied for 90 days.