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SC-C-40928 38509 POWER TRANSFORMER - vintage military-grade vibrator power transformer - Core Technical SpecificationsAccording to US Department of Defense parts registries, this specific Freed transformer adheres to the following structural builds:Enclosure Type: Hermetically sealed. The internal iron core and copper windings are completely enclosed in a rugged, fluid- or compound-filled metal can. This prevents moisture, mold, and atmospheric pressure changes from degrading the insulation at high altitudes or in tropical combat zones.Terminal Interface: 6 Turret Terminals. Rather than modern wire leads, it utilizes heavy-duty solder turrets protruding through ceramic or glass insulators on the header. These offer rock-solid wire wrap connections capable of surviving extreme mechanical shocks and heavy vibration in military vehicles.Mounting Configuration: Threaded stud mounting. Threaded studs extend from the base of the can so it can be securely bolted flat against a heavy steel or aluminum radio chassis.Functional ApplicationThis transformer was designed as the heart of a mobile vehicular or field power supply. When fed low-voltage battery power (typically 6V, 12V, or 24V DC) chopped into pulsating square waves by a mechanical vibrator plug, this transformer stepped that voltage up to B+ high-voltage DC (often ranging from 150V to 300V+) needed to fire up the vacuum tubes of tactical receivers, transmitters, or signal generators.