>
>My amp uses an Eimac 3CX3000A7, whose cathode is directly heated. (It's a
>thoriated-tungsten filament, IIRC.) An often-touted virtue of such a tube
>is that it requires just a couple of seconds of warmup time; in other
>words, it's "instant-on."
>
>My usual mode of operation is "search-and-pounce" DXing. In this mode I
>may spend 30 minutes scanning the band for a "new one," and then use the
>amp for a QSO lasting just a minute or two.
>
>What's best for the tube?
Leave the fil. off at all times.
cheers, Chuck
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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