Lot of early 1970s vintage technical books on engineering, diagnosis and repair of televisions, hi-fi stereos radios etc.. These are from the estate of an electrical engineer and all three have names inside the covers, but otherwise are in nice vintage condition.

There are: "TV Trouble Diagnosis Made Easy" - 1970, 255 pages with lots of illustrations, graphs, schematics, flowcharts etc.;

"TV, Radio & and Hi Fi Hints & Kinks" - 1971, 251 pages with sections on tools and test equipment, speakers and headphones, sound activated light displays (color organs), microphone, AM and short-wave radio antennas, tape recorders and phonographs, two way radios, stereo amplifiers and more. This is illustrated with lots of photos schematics and diagrams;

"CATV System Engineering" - 1970, 256 pages with lots of schematics, graphs, diagrams etc.