Two-channel mixer (T372E)

This mixer circuit was found in the 1961 RCA tube manual. The gain for each triode is approximately 20 times. The input impedance is high.

Transformer Amplifier Stage (CB966E)
This is stage is transformer coupled and was found in na old publication of the year 1958. The...
Balanced Mixer using an Integrated Circuit (CB4238E)
We find this circuit in a 1980s documentation. The circuit is for SSB modulation and the...
Tone Encoder (CB3961E)
This circuit has been found in older telecommunications documentation. Its purpose is to produce a...