A-A-50621
(b) Volume and Channel Selector Switch (Rotary).
EIA-520F000 Sectional Specification for Rotary Switches of Certified Quality (Low Current Capacity – 2 Amperes or Less)
(c) Enclosure. Bulkhead shall be as specified herein.
2. Enclosure.
(a) Loudspeaker enclosure. The loudspeaker enclosure shall have three 13 mm diameter holes in the back plate for bulkhead mounting. Mounting details shall be as shown on figure 1. Except for the increased depth incident to opening the hinged front cover 90 degrees and the clearance dimensions required to install, remove, or service the loudspeaker. The enclosure shall not be not greater than the following dimensions.
|
Width |
380 m |
|
Height |
380m |
|
Depth |
230 m |
1. Enclosure openings. The enclosure shall have an opening for the loudspeaker face. This opening and any port openings required to meet the specified performance characteristics, shall be covered with metal mesh or perforated metal not less than 1 mm thick. Mesh opening or perforations shall be not larger than 2 mm.
2. Enclosure construction. The enclosure shall be provided with a hinged front cover, held closely by a catches requiring no tools for operation. Opening the cover shall provide ready access to all interior components and to the enclosure mounting holes. Opening the enclosure shall not involve the disturbance of incoming cables or stuffing tubes. Component mounting fasteners shall be secured so as to no require demounting of the enclosure for component replacement. Components shall be mounted so that their terminal markings are easily visible with the enclosure door open. Damping material, if used, shall be fastened positively.
3. Cable entrance. Facilities shall be provided to admit cables through the bottom of the enclosure utilizing stuffing tubes.
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