Sony WRR-820 UHF WIreless Receiver (2)

We have several Sony WRR-820A UHF receivers in VG condition.   These receivers provide balanced and unbalanced outputs, a mixing input and a convenience AC outlet all in a single Rack Unit package.

Note this group operates in the 782 to 793 MHZ range.  

These units have been tested and are in working condition.

Here are some specifications from Sony:

WRR-820A
UHF Synthesized Diversity Tuner with Single Reception System

• PLL Synthesized Tuning: The PLL synthesized tuning control ensures easy handling of 64-102 frequencies from TV channel 59 through 69.
• Diversity Reception for Superb Stability The WRR-820R employ a space diversity reception system to eliminate signal dropout, and assure highly stable interference free reception.
• Convenient Pre-Programmed Channel Plans
• Combinations of intermodulation free wireless channels are stored as the channel plan in the CPU of each tuner to make choosing the correct operating frequencies for simultaneous multi channel operation an easy task. Each group allows for different variations on the number and combination of various UHF TV channels.
• Three Selectable Output Levels
• The output level of the WRR-820 can be selected from -60dB, -40dB or -20dB for flexible interfacing with other audio equipment, such as a mixer, audio recorder or amplifier.
• The WRR-820R provides DC 9V power supply for the UHF AN-820 Antenna.
• 1U High and 19-inch Rack Mountable.
• Space Diversity Reception

More:

• PLL Synthesized System:  Phase Locked Loop (PLL) frequency synthesized systems are employed both in transmitters and receivers, assuring carrier stability and providing easy access to multiple frequencies. These PLL controlled systems provide highly stable, selectable frequencies to be generated in increments of 125 kHz. Users may choose from 188 frequencies on USA type models, and 102 frequencies on AU models.
• Space Diversity Reception System
• A space diversity reception system is used to eliminate signal dropout. Dual antenna inputs and reception circuits incorporated in the diversity system receive signals over two different paths and select the stronger signal as the output. This switching operation is undetectable on the audio output of the receivers.
• Pre-programmed Frequency Groups
• Optimum combinations of calculated and practically tested intermodulation-free frequencies are stored in each receiver to make it easy to choose the correct frequencies for simultaneous multi-channel operation. These frequencies are arranged in groups, with each group pre- programmed to allow virtually interference free operation.
• Advanced Filtering
• The Sony wireless units all employ Helical, Ceramic and/or SAW (Surface Acoustic Wave) filters as appropriate. This offers stable reception and superb audio quality, and also enables the unique miniaturization seen in most of the Sony products.
• Tone Squelch Circuitry
• The wireless microphone transmitters also transmit a 32.768 kHz pilot-tone signal along with the audio signal. In the receivers, a squelch circuit is present, and the audio signal is only output when the tone signal has been correctly received.
• This squelch function is designed to virtually prevent the output of unwanted signals or noise from other signal transmissions in the air, as well as the RF noise and popping noise that occur when the transmitter is power on or off.
• Compander System for Wide Dynamic Range and Low Noise
• A compander (compressor/expander) system is included for improved audio dynamic range and low noise and interference. The time constants for attack and release times are carefully chosen in the various transmitters to match the application, ensuring minimized noise level while providing smooth and superb audio quality.
• Multiple Information on Easy-to-read LCD and LED
• Most receivers and transmitters feature easy-to-read LCD panel and LED indicators, which provide extensive information on the operating conditions. Most receivers will display the RF-input level, audio-output status, current channel number and frequency, and battery status of the transmitter.
• Most transmitters do in essence have the same information available in the receivers such as audio-input and RF- output status, current channel number and frequency, input attenuation setting, and accumulated battery operating time.
• Remote Battery Alarm on Receiver
• For added assurance of continued operation, users can monitor the battery reserves of handheld, body pack and plug-on transmitters. Remaining battery life is indicated on both the transmitter and receiver, with additional indication approximate one hour* before the battery goes dead. On the receiver, the battery indicator on the LCD and LED displays also flash, helping to avoid the chance of battery failure at a critical moment.
• *This may vary depending on the operational environment.
• Consistent RF Power Output
• A DC-DC convert circuit built into the power supply section of microphones/transmitters assures consistent output power over the life of the batteries.
• Channel Setting Back Up  Each unit has a convenient memory back up for storing operating frequencies. When the power switch is turned on, the previous channel setting is automatically recalled and displayed.