Electro-Voice CH230W manual Description and Application, Quality, Assembly Parts List

CH230/

CH230W

Condenser Cardioid Hanging Microphones

•Available in black or white

•Braided cable shield maintains horizontal aiming, even when temperature and humidity vary

•Preamp mounts in standard electrical boxes

•Steel preamp shield gives high resistance to electrical noise and rf interference

•Hum-bucking output transformer cuts hum by more than 20 dB

•Screw-type output terminals are reliable over the long term

Description and Application

The CH230 and CH230W hanging micro- phones, utilize back-electret condenser tech- nology to provide an extended, flat frequency response with a controlled cardioid polar pat- tern for high-quality sound reinforcement. The CH230 and CH230W were specifically designed to mic choirs, instrumental and vocal groups, and live theater. The size and color (black/white) of the transducer and cable allow the microphone to blend in with the surroundings.

The CH230’s low self noise and high output signal level combine to produce an excel- lent signal-to-noise ratio. Exceptionally high sensitivity, a uniform cardioid polar response, and smooth frequency response make the CH230 ideally suited for distant sound pick-up.The cardioid polar response is precisely controlled and is highly effec- tive in suppressing feedback without colora- tion of sound. Additionally, unwanted low- frequency noise such as the rumble from air- moving equipment can be reduced with the use of a switchable high-pass filter. The filter’s corner frequency (75 Hz) is low enough to have essentially no effect on voice

quality.

The CH230 and CH230W are easily aimed at the performance with the supplied steel wire hanger and holding nut. The wire hanger attached to the microphone element and cable can be bent to aim the microphone in the vertical plane. The horizontal position- ing of the microphone is accomplished by rotating the element and locking the posi- tion with the nut (detailed description later). This allows the microphone to be accurately positioned over a choir, stage or orchestra.

The CH230 and CH230W are furnished with 30 feet of black (CH230) or white (CH230W) miniature braided shielded cable. The design of the cable ensures the microphone’s horizontal position will be held stable without the need of fish-line tether- ing.

The CH230’s electronics module and mount- ing hardware allow quick assembly and mounting to a standard electrical switch box or four-inch electrical box. Figure 3 illus- trates the assembly for either box style. Con- necting a mixer to the electronics module is through the output terminal block. Power is obtained from any phantom source supply- ing 12 to 52 volts.

Assembly

Parts List:

1 microphone with hanger and 30 ft of cable

1 round plaster ring

1 rectangular switch cover

1 printed circuit board

1 shield box

1 strain relief

211/4-in. #4-40 Phillips-head screws

43/16-in. #4-40 Phillips-head screws

21/2-in. #8-32 Phillips-head screws

2#4 split-ring washers

2#4-40 hex-head nuts

4threaded spacers

6#4 fiber washers Tools Required:

Medium-head (#2) Phillips screwdriver Small-blade screwdriver

1/4-in. open-end wrench

Assembly Instructions (see Figure 3):

1.Identify the type of electrical box, switch or octagon, and select the proper cover plate to start the assembly.

2.Position the plate with the printed side