hi rich. you wrote:
<snip>
> Thus, there is no difference in the max. SSB PEP
> of a 3-400Z and a 3-500Z. Since it seems virtually certain that a 3-600Z
> will use the same 5v. 14.5a filament as the other two versions, the SSB
> PEP capability of the three will be identical.
maybe (probably) so. if not, as you point out, the filament
transformers will have to be changed.
but... if the 3-500z's are being run a bit too hard, (although i
doubt this has *ever* happened!) then the extra 100w of dissipation
capability will make the amps run a bit cooler... if the heat can be
spirited away properly.
it's kind of like running tetrodes with handles at 1500w out. they
stay cool and last a long time. (their filaments will allow more
output than 1.5kw, of course.) i personally *like* things that run
cool. i've found that they save money in the long run.
i've got a 4x150a amp (class c) that has given about 400 w out for
about 25 years! (not key down for 25 years! but when i ask it to,
it delivers.) it dissipates about 50w. these figures are from
memory, so i'm not absolutely certain. but it "keeps on tickin'"
73, k6gt
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