Yaesu FT-847 70 MHz filter simulations and modifications
by Marc Vlemmings, PA1O
Marc has produced two documents, covering his analysis and simulation of the RX and TX band-pass filters, and the PA output and low-pass filter circuits.
His analysis highlights errors in some of the previously published component values, and suggests corrected values.
Marc's documents can be downloaded in Adobe PDF format:
Marc's documents also include photographs of the PCB modifications, and his measurements of efficiency and reflection coefficient.
Yaesu FT-847 70 MHz band-pass filter simulations
Yaesu FT-847 70 MHz PA output and filter simulations.