Westinghouse TSC Transmitter Internal Detail Images

October 2011

Home


The Oregon Air and Space Museum has on display a Westinghouse TSC transmitter. This kind of low frequency transmitter was used as a navigation aid. It is really two transmitters in one, operating on different frequencies.
Here are highlighted primarily the interesting internal components of the transmitter. A partial front panel layout with close-up images is here. Most of this unit can be 'divined' by looking at it. Some notes are added where necessary.

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Left side view
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Top left compartment
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The bleeders and power reistors all seem to be here. The audio input is also in this section.
Left side
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left side, bottom, where the passive power components live. The modulation transformer, reactor, and capacitor are closest to the viewer.
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The reamost fan is apparently out of order. This needs repaired because above it are the MV rectifiers and several 805 tubes.
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Rear center view of lower section.
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Just behind the lower front panel on each side are knife switches.
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Rear view of ocillator, IPA, and 805 modulators. The blocked off fan is seen.
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Rear view of unmodulated side of the transmitter.
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Look like 872's.
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Top right compartment.
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Filament adjustable transformer
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Rear view
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Plate transformer data.
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ferroresonant type capacitor arrangement on plate transformer
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Main filters
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crystals
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Modulation transformer and coupling capacitor.
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Modulation transformer
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Modulation transformer
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Modulation reactor (interesting low value, but for voice..
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Mod. trans, cap, and choke..
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modulation coupling capacitor
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filter choke nameplate
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filter choke and parallel capacitor -note spark gap.
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filter ch. data plate, not easy to read. 17 ohms, 2H, 1.1A.
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small transformer, 12.6V
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audio input transformer
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modulated stage
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some art to work with?