ANTENNA TUNING SYSTEM ATS 50-2. SERIAL#832.


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This is an Antenna Tuning System ATS 50-2 plus the attached Directional Coupler Unit CU 2/50V. These were in the direct power output path of the GPT-750.

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Front view. I found a description in a TMC sales brochure that described a device called a "Standing Wave Ratio Indicator, Model SWR-1K" that looks exactly like this unit. I can't find anything on the unit that says SWR-1K. The meter, however, is definitely calibrated in VSWR, as well as forward and reflected power. The description from the sales brochure goes as follows: "The TMC Model SWR-1K Standing Wave Ratio Indicator provides an accurate indication of the standing wave ratio over the frequency range of 2 to 32 megacycles up to 1KW input for either 50 or 70 ohm transmission lines. The unique design of the instrument permits simultaneous indication of forward RF power, reflected RF power and direct readings of standing wave ratio."

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Here is the ID tag.

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Directional Coupler.

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Top view with lid off.

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Closeup of circuitry behind panel.

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Back view.

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Underneath the chassis.

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Closeup of under-chassis view.