On 14/09/2023 07:12, John Farmer VK7JB via groups.io wrote:
I¡¯ll put the oscilloscope onto the gates of the BS120s while the old IC5 is still in place and see what I find
John,
Just be aware that in at least one case, I think a QCX, the Si5351 and processor were damaged by 12 volts flowing back through the driver IC from a BS170 with, presumably a drain/gate short.
As Evan says testing with a likely damaged part still present is somewhat risky even if the 12V is not there.
73 Alan G4ZFQ
