|Solid State Talk all about solid state amplification.|
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|13th August 2011, 06:46 PM||#1|
Join Date: Jan 2006
Location: Athens GREECE
MILLER CAPS ...
OK... many said arround miller caps
been also playing around with various types ...
lets suppose a simple circuit example: the P3A
I would like to have opinions on what type of capacitor will play better ?
i have ceramics blue coloured that are 3KV 100pf
i have Cornell Dubilier mika also 100pf
i have 100 pf /160v styroflex
i probably have or can find other types also...
question is which is better to use and which will sound better from all if we take as a fact that value is 100pf ..
then comes one other question that is critical to me and here i need more help since my theory is bad :
question is how to calculate properly the value of the capcitor if VAS for exampe is BD 140 or MJE15035
thanks in advance
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|13th August 2011, 07:02 PM||#2|
Join Date: Nov 2009
The VAS transistor itself will mandate a value such that Cdom
will have a higher value than the BC junction varying parasistic
Generaly, a low Cob transistor will need a lower value than
devices like BD 140 or MJE15035 , but neverless , 47pf is generaly
an accepted working value for a simple VAS , while 100pF is mandatory
with darlington Vas.
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