[Elecraft] KPA500 Faulting on high SWR on power rise

[Richard Stutsman]

MFJ tuners that use switched tapped air inductors often fail to allow
sufficient spacing between each tap and the adjacent turns of the coil, and
either heat expansion or high-voltage arcing can cause shorts between the
tap and an adjacent turn, completely changing the effective tuner settings,
as a result. On MFJ's "Mobile" tuner I had to bend the adjacent turns away
from the soldered taps (by pushing each adjacent quarter turn into the
coil's interior, which is standard practice for these air inductors) in
order to get it to work right.

Rick N6IET