My 160m/80m/40m/20m amp design calls for a 250pF Ctune and 1500pF Cload.
I notice some designs use capacitors with the full capacitance range variables,
while others use lower-value variables and fixed caps switched into parallel
for 80m and/or 160m operation.
Rather than using the full range air variables I built (very large), I also
have commercial 25-95pF and 100-800pF air variables I could use for Ctune and
Cload respectively (with appropriate voltage/plate spacing).
Space, layout, and component availability is certainly easier with the second
option, but what are the disadvantages or pitfalls of doing so?
Steve, KK7UV
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