Field strength meter (CB8220E)

This passive tuned circuit was found in a 90s Popular Electronics. The coils must be according to the monitored waveband.

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TC35670 and TC35675 Bluetooth Controllers (COM141E)
November 2016 - Mouser Electronics has in stock the Toshiba Bluetooth TC35670 and 35675...
Bootstrapped Emitter Follower Stage (CB25619E)
This circuit with low impedance output and 900k input impedance was found in the October 1993...
80 W amplifier (CB13191E)
The transistors and integrated circuit used in this amplifier are no longer common today. For...