Page 42 - Build Your Own Transistor Radios a Hobbyists Guide to High-Performance and Low-Powered Radio Circuits
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FIGURE 3-6 Air-dielectric variable capacitors.

            The  first  capacitor  shown  at the  bottom  of the  figure  is  a  single-section  365-pF
            variable capacitor.  No trimmer capacitor is attached. This type of variable capacitor
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