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Old 14th July 2018, 04:52 PM   #1261
mchambin is offline mchambin  France
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There is no such a thing as a best cap over the all range of applications.
Transistor junction temperature is not transistor case temperature.
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Old 14th July 2018, 05:58 PM   #1262
carlmart is offline carlmart  Brazil
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Of course not. From what I've already read on this thread, different brands and models for specific applications.

A bypass capacitor will probably be different from an interstage one.
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Old 15th July 2018, 02:14 AM   #1263
anatech is offline anatech  Canada
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Best electrolytic capacitors
Hi Monte,
If there's a DC offset, and only one differential stage, it thus _must_ be the fault of the first stage, and so correcting it with a servo should actually re-balance the input pair from its imperfect state that causes the offset.
I'm sorry, but that is not correct at all. If the driver and output stage tends to one polarity, the diff pair would normally be the stage that corrects for this. But in doing so it must unbalance itself. You can see this in practice. By correcting the tendency in the pre-driver stage (say), you can balance the rest of the circuit and allow the diff pair to run in a balanced condition. Of course, there will be minor corrections needed from the differential pair, but the effect of unbalancing the diff pair will be greatly reduced.

For proof, look at the BGW-750B/C schematic and read about the setup procedure. This works in real life. Citing a successful commercial design should settle any misgivings you might have about what is not the way most people approach the problem. It is one of the right ways to do this.

"Just because you can, doesn't mean you should" my Wife
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Old 15th July 2018, 04:00 AM   #1264
mokran is offline mokran  United States
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Ow! This thread is running from last 9 years! It has some insightful capacitor information.
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