Channel Master 9521A
Remote control antenna rotor
Our take on the Channel Master 9521A by Crutchfield's Steve Kindig
For optimum reception of TV signals from more than one direction, it's hard to beat the combination of a good mid-range or long-range directional antenna and an antenna rotor like Channel Master's 9521A. This sturdily-built design can handle wind and weather for rooftop installations, and works great with attic-mounted antennas, too. You'll love the convenience of being able to control your antenna with pinpoint precision without leaving your chair.
The 9521A has three parts: the rotator motor, controller unit, and wireless remote control. The rotator unit attaches to your antenna mast, and a special 3-conductor wire connects the rotator to the controller unit (controller wire is not included). The controller unit is located indoors, away from the elements, typically near your TV. It has a digital display for channel and diagnostic info, and includes an AC power supply that powers the 9521A system. The supplied remote control is easy to use, and this system can also be operated using many universal remotes.
- heavy-duty rotator motor
- cast-aluminum housing
- mounts to antenna mast (max. mast diameter 2")
- 9-3/8"W x 10-5/16"H x 4-5/8"D
- auto synchronization ensures accurate positioning
- direct access via channel number or compass location
- digital channel display
- 69-channel programmable memory
- compatible with most universal remotes
- includes wall-plug AC power supply
- control wire not included
- remote control
- warranty: 90 days
- Our 60-day money-back guarantee
What's in the Box:
- AC power supply
- Wireless remote
- 2 "AAA" batteries
- Installation and operation instructions
Rotor was everything we expected. It works wonderful!
Cindy, Fremont, OH
Overview: A Rotor or Rotator is a mast-mounted, motor-driven device that permits you to conveniently rotate (orient) the outdoor antenna in any direction to optimize reception of a desired TV channel. A rotor should be considered when TV signals are being broadcast from towers in different directions and a single antenna cannot accommodate all locations. The rotator consists of two parts; an indoor control unit and an outdoor drive unit. The two are connected via a 3-conductor wire (not included) that carries the voltage and control signals.
Note: The control unit for the Channel Master 9521A is not backwards compatible with any of the older Channel Master rotors.
Direction: The compass heading (direction) you want the antenna to point can be entered directly using the included remote, or you can scroll to the correct heading using the up and down buttons on the control unit (example: 90° to point east, 225° to point south-west, etc).
Programmable: You can program 69 antenna locations (1-69), corresponding to 69 over the air broadcast frequencies. This way the antenna direction preset number can be the same as the channel number. The non-volatile memory will hold your programmed locations during a power failure.
Synchronize: After moving back and forth many times, a mechanical device can become misaligned with its electrical controller. At any time you can Synchronize the drive unit and control unit. To realign, the motor turns fully counter clock wise and calibrates that direction to 0° (the orientation of the drive unit is fixed at installation). If you prefer, auto synchronization can be turned on and the system will realign itself after each 50 direction movements.
Drive Unit: The drive unit uses a heavy duty motor in a one-piece cast aluminum housing with a durable powder coat painted finish. It uses a precision cut gear system, built-in steel thrust bearings, and has wind-tested brake pads.
- Rotation: 1 RPM
- Gear Ratio: 3200 to 1
- Maximum Mast Diameter: 2 inches
- Maximum Vertical Load: 250 pounds
- Maximum Balanced Wind Load Area: 3 square feet
- Operating Voltage: 117 volts AC/60 Hz (rotator and control unit)
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.