>>A Gu74 would take c. 2400v from two quadruplers, one pos and one neg, in
>>series. What do you think?
>
>Yes, that would be best for SSB, so long as the GU74 can stand 8*Vpk = 2715v
>offload with UK 240v mains.
then perhaps a 4cx800 or 4cx1600 ?
>The symmetry of 2 quads improves ripple too.
>It's over running the valve a bit for CW, which is my main interest, and
>you don't need those extra volts for 500W out. I was trying to think
>minimalist and have "just enough" of everything, to keep the weight down.
>And a big safety margin on the valve is just insurance from dumb ops! BTW,
>the 500W design target is based on the experience that it makes a
>significant difference over 100W (especially on LF) and that 1KW amps can
>cause grief with feeble mains supplies.
>
>A couple of the DXpeditioners over here are mildly interested, but I doubt
>they will actually build anything. Being DXpeditioners they are mostly ops
>rather than engineers.
>
>Bed time now. Thanks for applying the brain cycles to my hypothesis.
ur welcome. cheers,Alan
>
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- Rich..., 805.386.3734, www.vcnet.com/measures.
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