Great stuff from Mike and from Frank Harris K0IYE. But when I put the VFO in a box, I usually try to put the frequency determining components (the coil and most of the caps) in the box, with the powered components (transistor, Zener, voltage dropping resistors) outside the box. If I put these powered components in the box, I find there is some drift as these components slowly heat up the interior of the box.
Dean KK4DAS and he VWS Builders have just stated building analog VFOs, so Mike's video is very timely for them.
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