|Pass Labs This forum is dedicated to Pass Labs discussion.|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|4th February 2003, 03:28 PM||#1|
Join Date: Jan 2002
Different values of C7 (CE) in Alephs
I am making an Aleph 30 with Kristijan PCBs for Aleph 5.
It is easy to adapt but my doubt is about C7.
The only difference in my A30 is that C7 is from the collector to emitter instead collector to base in original A30.
BrianGT ask to Mr. Pass about similar problem and he say :
"The value of the npn compensation cap pretty much depends on the placment. .001 for CB or .01 for CE."
I see different schematics with 0.047 or 0.01 for collector to emitter placement. What it is the correct value in this case?
Note : Sorry for my bad English.
|4th February 2003, 03:39 PM||#2|
Join Date: Dec 2002
Location: Vienna, Austria
try and error
this cap is either nfb (CB) or output to gnd (CE).
It forms a lo pass with R18 in the CE config.
in CB it forms a fb loop thus "slowing down" the npn
to avoid oszillation.
I would put either .001 in CB or .047 in CE.
'Jazz is not dead, it just smells funny' F.Zappa
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Best Alephs for a bi-amp configuration||Sony||Pass Labs||2||12th January 2005 07:20 PM|
|Any old alephs||dhole||Pass Labs||1||10th December 2004 08:33 PM|
|Audioquest stuff between Alephs||tortello||Pass Labs||2||14th January 2003 07:47 AM|
|what are the differences between the different alephs?||Bricolo||Pass Labs||19||31st December 2002 05:48 AM|
|Parralleled Alephs||audionut||Pass Labs||6||22nd November 2002 05:26 AM|
|New To Site?||Need Help?|