So what benefit did directly grounding the grids bring?
More output on any or all bands for the same drive power?
The same output on any or all bands for LESS drive power?
A better VSWR between the radio and the amplifier input? The stock 220 input
VSWR on 10 and 15 is pretty poor.
Does the amp tune smother on 10 and 15?
In short, you said it works, but what does the change do to make it worth while?
73,
Tim K3LR
A P wrote:
> First. . .good news Jose. Just keep up the high voltage respect . . .
>
> Second. . . SB-220 with directly grounded grid (three rg58 braids on each
> tube). Smoke test was a complete success. The amp tuned up on all bands
> (though with more load capacitance than expected into the dummy load) and
> put out rated power. For 70W input on 28.885 it put out 900W (120VAC mains).
> Tuning was smooth and all functions were as expected. I think I'm going to
> leave the amp this way. . .
>
> Thanks to all for the advice . . . .
>
> 73,
>
> de k3xf
>
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