Above — Another super buffer schematic with measures. In Winter 2015 I explored ways to cascade common base amps to develop “super buffers” possessing really high reverse isolation. L-network matching tends to work best @ 1 frequency, however, with experimentation, they can work over a limited range with respect to VFO output amplitude flatness.
Above — VFO schematic built on single sided Cu board. The resonator T50-6 toroid is both zap strapped and epoxy glued to a piece of copper-clad board. A red colored wire provides the 1 link output to the VFO buffer.
Mixer Experiments
I built a few active mixers and will refer to just 2:
