>
>measures wrote:
>>With a tetrode, one tunes/loads for a specified screen current when the
>>tank is resonant. Heavier loading =s less screen current. In practice,
>>this proceedure is close enough to simply tuning for max. relative output
>>-- as with a g-g triode. // Burning up a tetrode's screen from
>>mistuning is unlikely because screen supply power transformers usually
>>have fast-acting fuses in the primary.
>>
>Can anyone think of a *worse* way to protect the screen of a tetrode?
>
Substitute a 20A slow blow fuse for the fast blow screen fuse? Wrap
aluminum foil around an open fuse and reinsert in the screen fuse holder?
- During the entire time that the Plywood Box was in service, it
consumed less than 1 box of 5 fuses. Rated screen dissipation was 275w.
The fast blow fuse opened at roughly 200w.
cheers, Ian.
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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