This circuit for equipment adjustment and diagnostics was found in a Mullard transistors manual from 1960. Information about the transformers is given with the diagram.
We found this sensitive moisture detector in an old documentation. The circuit uses a common JFET,...
This circuit, with the assembly in a contact matrix, was found in a publication from the 90s. The...
This modulator circuit for transmitters was found in American documentation from 1964. It can be...