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Old 05-09-2013, 12:54 AM
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radiotvnut radiotvnut is offline
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Location: Meridian, MS
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Yes, worked on a bunch of them. They were made during the early-to-mid '80's, while RCA was still RCA and for a brief period after GE bought RCA. There was even a cheap console that used the newer CTC130 chassis that used this tuner as recent as '87-'88.

There were also some 19" sets labeled "Mural TV" that had a built in AM/FM radio and these were used mainly by hotels/motels. In the mid '90's, I briefly did some work for one of the low budget "flop house" motels and saw quite a few with the tuner shaft broken off from abuse.

The biggest problem with the 120's were the main filter cap opening up and a loss of color; which, was caused by a misaligned/defective trimmer cap in the chroma circuit. These were good sets and I have the standard two-knob tuner version buried in the basement.

RCA also made a 9" version and a 13" version, along with some 25" consoles, that used the one knob varactor tuner.

The single knob varactor tuner began to see widespread use in the mid '70's and was used by just about everybody (RCA, Sylvania/Philco, Magnavox, Zenith, Sanyo, etc). It was a way to add electronic tuning and still retain a knob style channel selector that so many people were used to.
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