Chris, G5CTH <chris.rowland@...> wrote:
One theory is that there is no envelope shaping on the SSB calibrations
and this can generate voltage surges which causes some BS170s to fail.
Hans has said that he will add envelope shaping to the SSB calibrations.
This is interesting. QDX has the same transistors in the PA, doesn't have
envelope shaping by design, and typically doesn't routinely damage the PA.
