>Rich says:
>
>>The screen normally has a few nF of bypass C built into the socket
>
>Let's assume that the screen bypass is 5000pF, and the source resistance of
>the rectifiers is 1000ohms. This gives a time constant of 5 microseconds. So
>now assume that the phase delay on a 3kHz component is 3 time constants, and
>it represents 16 degrees. But the amplitude actually varies at syllabic rate
>which is much lower, so how much phase distortion is actually produced?
A complex problem . Also, at say 14MHz, the grid is changing
considerably faster than every 5uS. .
>
'tis a sticky wicket, Peter
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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