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Old 16th November 2011, 09:09 PM   #3191
generg is offline generg  Germany
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Hi ZM,

The 1000uF cap, isn't it important wether we look at BA-1 or BA -2?
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Old 16th November 2011, 09:47 PM   #3192
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C208 , on BA1 FE and also in BA2 FE schematic ?

if that cap is in question - it is just part of bootstrap mechanismus (R208,R209,C208 on BA1 FE schm) .

plain industrial quality cap is sufficient
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Old 16th November 2011, 10:02 PM   #3193
generg is offline generg  Germany
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Sorry that I was not more clear from beginning......

I mean C101 used in BA-2 value 1000uf

In this circuit version Burning Amplifier BA-3
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Old 16th November 2011, 10:18 PM   #3194
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same approach - that cap is across bias network

some will say that his role is to bootstrap bias network - maintaining constant voltage across it ; Q113,R127,R128,P101

industrial quality cap is sufficient ; for piece of sleep - you can always bypass it with fine MKC
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Old 17th November 2011, 03:50 AM   #3195
generg is offline generg  Germany
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O.k. Zen Mod, this answer let's me sleep better....
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Old 17th November 2011, 05:43 AM   #3196
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OK

now wake up - time for school

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Old 17th November 2011, 06:36 AM   #3197
generg is offline generg  Germany
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You forgot, I am retired...... To verify this now I will sleep two hours longer!

Dreaming of SITs, Nelson and Aleksandar speaking to me.....
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Old 17th November 2011, 06:52 AM   #3198
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I didn't forgot that you're enjoying your free time much more than earlier ..... just joking about old habits

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Old 17th November 2011, 06:57 AM   #3199
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I'm talking about these caps.
F4_BA-2_comp.JPG
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Old 17th November 2011, 07:44 AM   #3200
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same purpose , different arrangement ;isolating two nodes DC wise

you can use them in both ways , and bypassing them with sweet small film cap can't harm
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