UHF amplifier (CB10063E)

This amplifier was found in a 70s documentation. The product gain x bandwidth is 350 MHz. The integrated circuit is from that time, uncommon today.

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Rain Alarm or Door Bell (CB5369E)
This circuit was found in a 1980s documentation. Q1 and Q2 can be BC548 and SCR a TIC106. The...
three-level touch control (CB7040E)
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RN2903 Transceiver Module for Long Range (COM036E)
It can be obtained from Mouser Electronics new transceiver modules long range (LORA) Microchip...