After reading Steve¡¯s comment I agree whole heartedly. I am in India and going off memory which isnt too great,
Albert
On Monday, September 19, 2022, 10:48 PM, KW4H via groups.io <reedsteve@...> wrote:
I found a much more detailed manual for the S-40 and, as it turns out, it has a highly detailed description of most every component.? Very well-written.? Anyway, my question was answered by Phil Patton (thanks!) but I'll share Hallicrafter's info here.? The purpose of R-30 is to suppress parasitic oscillations.? C-16 is the oscillator grid coupling capacitor (obviously), and C-26 is an additional fixed trimmer across the resonant circuit.? Eliminating R-30 is unhelpful, and wiring C-26 directly to the grid of the oscillator is almost certainly an electrical mistake, as it exists as a trimmer for the oscillator circuit, which exists on the other side of C-16.? No question this needs to go back to the factory design -- and I'll have to keep a very close eye out for other little experiments that might exist in this specimen.??
73 - Steve, KW4H
