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SECTION FIVE


GLOBE MASTER 304TL MODULATOR



DESCRIPTION


The Globemaster 304TL modulator consists of the following stages:


Balanced microphone and line XLR audio input connectors, switchable on back panel.

6SJ7 microphone preamp

6SN7 first stage audio amplifier and phase splitter

6SN7 second audio stage driver

6L6G / 5881 third stage audio driver

304TL class AB1 audio output to 1.33 to 1 impedance ratio custom modulation transformer (rated 2.2KVA)


The high voltage power supply consists of a choke input, full wave rectifier (one pair 3B28’s) 3Kv (no load) 2.2Kv@500mA (measured) mounted on a steel plate below the modulation transformer.



MODULATOR TOP VIEW



MODULATOR BOTTOM VIEW


MODULATOR COMPONENTS LAYOUT


SCHEMATICS AND WIRING DIAGRAMS



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