Westinghouse TSC Transmitter Internal Detail Images

October 2011

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.

Left side view

Top left compartment

The bleeders and power reistors all seem to be here. The audio input is also in this section.
Left side

left side, bottom, where the passive power components live. The modulation transformer, reactor, and capacitor are closest to the viewer.

The reamost fan is apparently out of order. This needs repaired because above it are the MV rectifiers and several 805 tubes.

Rear center view of lower section.

Just behind the lower front panel on each side are knife switches.

Rear view of ocillator, IPA, and 805 modulators. The blocked off fan is seen.

Rear view of unmodulated side of the transmitter.

Look like 872's.

Top right compartment.

Filament adjustable transformer

Rear view

Plate transformer data.

ferroresonant type capacitor arrangement on plate transformer

Main filters

crystals

Modulation transformer and coupling capacitor.

Modulation transformer

Modulation transformer

Modulation reactor (interesting low value, but for voice..

Mod. trans, cap, and choke..

modulation coupling capacitor

filter choke nameplate

filter choke and parallel capacitor -note spark gap.

filter ch. data plate, not easy to read. 17 ohms, 2H, 1.1A.

small transformer, 12.6V

audio input transformer

modulated stage

some art to work with?