[Amps] Amp output power

[Alek Petkovic]

On 23/08/2015 3:10 PM, Bill Turner wrote:
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
> 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.
>    
Maybe even less than that with the anodes screaming along at 3.6kV!!

73, Alek
VK6APK




> 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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