Differential Output Amplifier (CB6135E)

This circuit of old American documentation (1965) can be applied to any transistor.

| Clique na imagem para ampliar |

Frequency triplicator with varicap (CB4113E)
This circuit triples the frequency of a low-intensity signal and is suitable for VHF and UHF...
Broadcasting band amplifier (CB8404E)
Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz....
Absolute Value Amplifier (CB4902E)
We found this circuit in an old American documentation. The operational amplifier is not common...