CRAC's "A Collection of Rare Radio Publications from 1928-1949 China," featuring a large collection of old radio materials from the Republic period, including various vacuum tube circuits, vacuum tube radios, crystal radios, and antennas, is a rare and valuable resource for studying radio technology from that era.
Official link http://www.crac.org.cn/News/Detail?ID=3032
Official（BA1HAM）Baidu Cloud Link: https://pan.baidu.com/s/1n5uoNsiNsrIegUKloOohEw Password: 7tcr
Self-created BT magnet link folder: magnet:?xt=urn:btih:7RZISCQX5UESJFKC453F3JKJVQ6YLVDN
Self-created BT magnet link, single file: magnet:?xt=urn:btih:OD2ZFOXG3L5EOGRK74ZCNHQRKKITHCOJ
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