Circuit Modification

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BillionPower

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Joined 2004
#1
Has anyone Used Transistors to replace STK0039 Tip35 & 36 Tip41 & 42 2 diodes and 47 ohm and 470 ohm resistors. Can someone look at this Mod and see if This can work and what other modifications needed.

Thanks
 

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#3
BillionPower said:
Can someone look at this Mod and see if This can work and what other modifications needed.

Thanks
Click to expand...

Hi Billlion Power!

Yes ...your modification will work!

You must take care of the thermal tracking of the output transistors and put a pot for adjusting the bias...i prefer to use a transistor as VBE for traking, but the diodes can work if you put them in thermal contact with the output transistors.


So ...turn on your soldering iron...😉



PS:Maybe the compensation need some fine tuning......
 
#6
Duo said:
Wouldn't it be even more effective to put the cap across the whol diode network?(right from base to base?)

I'm not perfetly sure on this one, but I've done and seen it before with good results. Any opinions?
Click to expand...
Yes!!! ..It's allways a good design pratice to put a capacitor across the biasing network!
 
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