LED Sequencer (CB21711E)

This is one of the many versions of this circuit that appear on this site. We got it from an internet documentation.

Triggered Astable 4011 (CB24860E)
Active with the output at the high level, this oscillator was found in November 1984 Radio...
Matching antenna (CB7458E)
The coil and sockets of this circuit found in a QST depend on the frequency band that is intended...
Proportional control (CB21376E)
We found this circuit in an old American documentation. The operational amplifier is from the time...