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RADIO ARAGON S L
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RADIO ARAGON S L
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Application filed by RADIO ARAGON S LfiledCriticalRADIO ARAGON S L
Priority to ES0036455UpriorityCriticalpatent/ES36455Y/en
Publication of ES36455UpublicationCriticalpatent/ES36455U/en
Application grantedgrantedCritical
Publication of ES36455YpublicationCriticalpatent/ES36455Y/en
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups
(AREA)
Details Of Audible-Bandwidth Transducers
(AREA)
Abstract
Improved multiple-use loudspeaker interphone system, characterized by having a permanent magnet loudspeaker, preferably 3 to 4 inches, used with a microphone, which coupled to its transformer and regulated by a potentiometer of 500,000 ohms, attacks a preamplifier valve of type preferably UAF42 or similar. (Machine-translation by Google Translate, not legally binding)
ES0036455U1953-05-291953-05-29
Improved multi-purpose loudspeaker intercom unit
ExpiredES36455Y
(en)