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Old 11th November 2010, 02:47 AM   #791
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Oh , attached..

They Fit, with all the goodies.
OS
Attached Files
File Type: zip BX1.2VB.zip (668.7 KB, 141 views)
File Type: zip CX1.2VB-U.zip (795.0 KB, 135 views)
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Old 11th November 2010, 02:51 AM   #792
sonidos is offline sonidos  United States
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The Fairchild KSC versions work ok compared to the 2SC versions, right? I order about every other month from Mouser, so I hope these give a good bang for the buck.
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Old 11th November 2010, 03:08 AM   #793
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The Fairchild KSC versions work ok compared to the 2SC versions, right? I order about every other month from Mouser, so I hope these give a good bang for the buck.
Thats all I buy (lots of 100) KSC3503/KSA1381 -gain group "E" , Ksc1845/Ksa992 - gain group "F". For the CX , use MPSA18 (low noise) ... it will match a Jfet input pair. Both amps have a soft , non-fatiguing character with the dominant H2 as the only distortion component.
OS
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File Type: jpg fairchild.jpg (136.1 KB, 413 views)
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Old 11th November 2010, 03:12 AM   #794
sonidos is offline sonidos  United States
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Cool! Sounds like chicken fried steak, eh?
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Old 11th November 2010, 03:17 AM   #795
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Cool! Sounds like chicken fried steak, eh?
Top sirloin w/ steak sauce.
OS
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Old 11th November 2010, 09:11 AM   #796
dadod is offline dadod  Croatia
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Hi OS,
CX is good for MOSFET OPS, but not so for BJT OPS.
How to keep bias stable as there is no CCS and CM is not any kind of a constant current source. For MOSFET OPS it is not critical, but for BJT a variation of the bias current is not wanted (B class).
dado
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Old 11th November 2010, 02:27 PM   #797
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Hi OS,
CX is good for MOSFET OPS, but not so for BJT OPS.
How to keep bias stable as there is no CCS and CM is not any kind of a constant current source. For MOSFET OPS it is not critical, but for BJT a variation of the bias current is not wanted (B class).
dado
BX and CX attach to a power board that HAS a full Vbe bias shunt which bolts to heatsink. Bx,Cx are just the modular voltage stages.
OS
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Old 11th November 2010, 03:12 PM   #798
tinitus is offline tinitus  Europe
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hey OS
I couldnt help it, my usual foolishness, I had to try
I rearranged Q1,2,3,4 just a small bit
and a bit around Q6
and some ....

btw, OS has allowed me to do it
but better check for errors

as I said to ossie, Im not saying its better, but maybe only easier to DIY it
Attached Images
File Type: jpg OS BX1 edit 4.JPG (151.1 KB, 336 views)
File Type: jpg BX1.2VB_OVERVIEW.JPG (444.4 KB, 310 views)
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Old 11th November 2010, 03:13 PM   #799
dadod is offline dadod  Croatia
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Hi OS,
But the current trough Vbe is not constant for CX.
dado
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Old 11th November 2010, 06:32 PM   #800
tinitus is offline tinitus  Europe
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ok, last one, before ossie begins to throw things at me
and its only "cosmetic"
man, those things take time
Attached Images
File Type: jpg OS BX1 edit 4.JPG (149.9 KB, 299 views)
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