Buffer with MOSFET (CB26318E)

This boost amplifier was found in a Popular Electroniics from the 90s. The circuit operates up to 20 MHz depending on the coils used.

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Four Transistor Phono Amplifier (CB951E)
This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer...
70 MHz FI amplifier (CB14817E)
This circuit is used in VHF and UHF superheterodyne receivers. The circuit is from the 1964 RCA...
Precision Function Generator (CB20951E)
This circuit was found in ancient American documentation. It makes use of the operational...