On Tue, 25 May 2004 19:43:42 GMT, "Henry Kolesnik"
wrote:

They continued to work well and
I always thought this was from overdriving but now I'm not so sure because
it ran at the same high swr as the 30S-1.

Hi Hank,

I gave this some more thought from my Collins period. If I recall,
overdriving an amplifier brings damage to the grid, which has its own
dissipation limit. The usual failure mode is that it melts or sags
and causes a grid-cathode short. This is especially true in
lighthouse style tubes.

73's
Richard Clark, KB7QHC