PPA T27 FM transmitter with (1) ANT 021 antenn

The Williams AV PPA VP 37-00 Personal FM Value Pack System combines the PPA T27 transmitter and PPA R37 receiver, with one ANT 021 antenna identified in the supplied product data. It operates in the 72–76 MHz band and provides 17 transmitter channels. With the standard ANT 021, the system has a nominal range of up to 1,000 feet (305 m). Earbuds and neckloops are not included.

Ideal Use Cases

This system is suited to applications that need to send a microphone or line-level audio source to a portable FM receiver within a defined coverage area. The T27 accepts an electret microphone through a 3.5 mm input that supplies DC power. Its unbalanced, high-impedance RCA input accommodates a line-level source. The battery-powered R37 receiver provides a 3.5 mm stereo/mono output for connecting a selected earphone or headphone.

Why Choose This Model

The T27 offers 17 externally selectable and lockable channels, allowing the operating frequency to be chosen from 72.1 through 75.9 MHz. Its ANT 021 antenna supports a nominal transmission range of up to 1,000 feet. Microphone and line inputs have specified nominal levels of 1–10 mV and 0.1–1 Vrms, respectively. A screwdriver-adjustable input attenuator provides control over the incoming signal level. The transmitter also supports optional ANT 025, ANT 024, and ANT 005 antenna configurations through its listed antenna connections.

Installation and Integration

The T27 operates from 105–130 VAC at 50–60 Hz and consumes 3.2 W at 120 VAC. Install the ANT 021 on the transmitter’s thread mount, connect either a 3.5 mm microphone source or an RCA line-level source, and select one of the 17 channels using the external switches. The frequency selection can be locked after setup. Set the R37 receiver to the corresponding channel using the seek button located in its battery compartment. The receiver operates on two AA alkaline or two AA NiMH batteries. With two BAT 001 non-rechargeable alkaline batteries, its listed battery life is approximately 50 hours. The receiver’s earphone or headphone cord functions as its integral receive antenna.

Performance Highlights

• The transmitter provides FM modulation with ±75 kHz peak deviation, 75 µS pre-emphasis, and stability of ±0.005% over 0–50°C.
• RF field strength does not exceed 80 mV/m at 3 m, while the listed nominal range reaches up to 1,000 feet with the ANT 021 or optional ANT 005 antenna.
• The R37 has a 200 Hz–15 kHz frequency response, 75 µS de-emphasis, ±120 kHz AFC range, and sensitivity of 2 µV at 12 dB SINAD with squelch defeated.
• Receiver output is rated at 35 mW maximum peak into 16 ohms through a 3.5 mm stereo/mono phone jack.
• The receiver’s signal-to-noise ratio is specified at 65 dB minimum at 100 µV, while transmitter distortion is listed at 1% maximum THD.

What Makes It Different

The package brings the fixed-location T27 transmitter and portable R37 receiver together with the standard ANT 021 antenna. The T27 combines lockable external channel selection with separate microphone and RCA line inputs. On the receiver, a green LED indicates power and flashes green for low battery. The R37 enters sleep mode after approximately six minutes without an RF signal. Listed approvals include FCC, Industry Canada, RoHS, and WEEE. The supplied warranty information states a Lifetime PLUS Limited Warranty, with 90 days on most accessories.

Final Assessment

The PPA VP 37-00 provides a documented 17-channel FM path from microphone or line-level audio to a portable receiver. Its 72–76 MHz operation, up to 1,000-foot nominal range with the ANT 021, lockable transmitter controls, flexible input connections, and approximately 50-hour alkaline receiver battery life define its principal capabilities. Buyers should plan separately for earbuds or neckloops because neither is included.