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On Sat, 22 Aug 2015 11:46:29 -0400, Chris wrote:
>Trying to get a fairly accurate estimate on what the output would be from a
>amp with...
>3600 plate volts
>3 - 3cxp800
>100 watts drive
>
>can anyone help with the formula.
REPLY:
Operating class AB, you can figure between 60-65 percent efficiency
when tuned for 1500 watts output.
Even in grounded grid, 100 watts drive will be too much, i.e. will
push you over the legal limit of 1500 watts in the US. You will only
need about half that.
As a side note, you only need two of those tubes for a legal limit
amp. Using three will let them run a little easier but IMO, not worth
the extra expense and the complication of excess plate capacitance on
10 and 12 meters.
If you operate them within their specs, two tubes will give you the
legal limit and will last essentially forever.
73, Bill W6WRT
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