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parallel sections
parallel sections
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Old 21st July 2006, 07:01 PM   #1
memphissound is offline memphissound  United States
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Default parallel sections

Would someone here please help me with the gain calculations of parallel sections of an amplifer circuit? Something like the input driver of a Fender BF reverb system, or the gain stages in a Matchless guitar amp. Wheather it's mathematical or graphical is fine. The graphical might be a little easier to communitcate. Thanks.

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Old 21st July 2006, 09:24 PM   #2
Tubes4e4 is offline Tubes4e4  Germany
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Default Re: parallel sections

Hi memphissound,

when you parallel two sections of the same type, you get the same mu, half the rp and double the gm of a single section (given you half the value of the plate- and cathode resistor, too).

In real life circuits, stage gain (note: not mu!) might rise a wee (moot) bit because the loading (due to the following circuitry/stage) of each paralleled section is only half to that what a single section alone would "see".

If in doubt, just measure.
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