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- Operatic_school_PA abstract "In the valve era, the Bland radio company made a centralized PA system for schools in Australia.The central unit consisted of a preamp for a microphone, turntable, AM radio tuner, and a push-pull amplifier, and switches that would switch it to drive speakers located in the classrooms, and out in the school yard.The speakers in the class rooms were a wedge type cabinet design, and were mounted on the wall up high, containing a 20 cm Rola loudspeaker. The "yard" speaker was also a 20 cm Rola, but housed in a large steel horn, that was mounted high up on either the wall of a 2 story school building, or sometimes on the roof of a school building.The amplifier delivered a 70 volt line type output that coupled to the speakers via 500 ohm matching transformers, mounted in the speaker inclosures at each locality.".
- Operatic_school_PA wikiPageID "28476163".
- Operatic_school_PA wikiPageLength "2372".
- Operatic_school_PA wikiPageOutDegree "6".
- Operatic_school_PA wikiPageRevisionID "655660552".
- Operatic_school_PA wikiPageWikiLink ABC_Radio_(Australia).
- Operatic_school_PA wikiPageWikiLink Australian_Broadcasting_Corporation.
- Operatic_school_PA wikiPageWikiLink Category:Broadcasting_in_Australia.
- Operatic_school_PA wikiPageWikiLink Constant-voltage_speaker_system.
- Operatic_school_PA wikiPageWikiLink Constant_voltage_speaker_system.
- Operatic_school_PA wikiPageWikiLink Microphone_preamplifier.
- Operatic_school_PA wikiPageWikiLink Programmes_for_schools.
- Operatic_school_PA wikiPageWikiLink Push-pull_output.
- Operatic_school_PA wikiPageWikiLink Push–pull_output.
- Operatic_school_PA hasPhotoCollection Operatic_school_PA.
- Operatic_school_PA wikiPageUsesTemplate Template:Multiple_issues.
- Operatic_school_PA wikiPageUsesTemplate Template:Reflist.
- Operatic_school_PA subject Category:Broadcasting_in_Australia.
- Operatic_school_PA hypernym Design.
- Operatic_school_PA type Article.
- Operatic_school_PA type Article.
- Operatic_school_PA comment "In the valve era, the Bland radio company made a centralized PA system for schools in Australia.The central unit consisted of a preamp for a microphone, turntable, AM radio tuner, and a push-pull amplifier, and switches that would switch it to drive speakers located in the classrooms, and out in the school yard.The speakers in the class rooms were a wedge type cabinet design, and were mounted on the wall up high, containing a 20 cm Rola loudspeaker.".
- Operatic_school_PA label "Operatic school PA".
- Operatic_school_PA sameAs m.0crh2zd.
- Operatic_school_PA sameAs Q7096679.
- Operatic_school_PA sameAs Q7096679.
- Operatic_school_PA wasDerivedFrom Operatic_school_PA?oldid=655660552.
- Operatic_school_PA isPrimaryTopicOf Operatic_school_PA.