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Old 6th April 2012, 04:29 PM   #101
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Hi!ZM what do you think about 15pf value i think it will/schould be perfect
yes
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Old 6th April 2012, 04:31 PM   #102
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If I had one I would try it......I'm going to do the other channel and listen for a while.
Ok good job and good listening!
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Old 6th April 2012, 09:10 PM   #103
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now desolder both 1nF caps - they;re antioscillation thingie , observe that you don;t have oscillation ,and the fiddle with value of C4

try 15pF for start
Oh no....another doubt's shakespeare to put or not to put C105 and C102
Why in Briangt pcb there isn't C105 and why do you have suggested to eliminate C102 for oscillations problems related?
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Old 6th April 2012, 09:15 PM   #104
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if amplifier is stable without them , leave them out

simple as that

no further comment on BGT choices
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Old 7th April 2012, 03:02 PM   #105
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If I had one I would try it......I'm going to do the other channel and listen for a while.

I'll order a few values on my next Digikey order.
Hi!BW what news about 1nF caps eliminated ?
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Old 7th April 2012, 03:04 PM   #106
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A little hint.... what do you think of thermally coupled q1 and q2 in the differential stage?
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Old 7th April 2012, 03:12 PM   #107
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more gentle change of output offset and bias , through temp. equilibrium cycle
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Old 7th April 2012, 03:44 PM   #108
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more gentle change of output offset and bias , through temp. equilibrium cycle
Sorry but my google translator is mad,please can you explain with other word?
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Old 7th April 2012, 03:50 PM   #109
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if you thermally connect input mosfets , there will be smaller difference in output offset an Iq , between cold and hot state

cold meaning just powered , hot meaning working temperature
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Old 7th April 2012, 04:01 PM   #110
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if you thermally connect input mosfets , there will be smaller difference in output offset an Iq , between cold and hot state

cold meaning just powered , hot meaning working temperature
Ok ..now i understood,so it is not important as the matching of q1 and q2 for correct reconstruction of the wave form output,but only for startup idle current before of the termical stabilization.

Thanks ZM
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