meanwhile several transistors have tested bad so thats it for restoring. A bit sad but when I think of ehat a pain it was to take it a part properly I dont even wanne know how long the assembly would have taken. I kept all the knobs etc so I can make it look original as soon as I have decided what to put inside. Thanks for you help, at least I've learned some things I didnt know before 
have a nice weekend! bye bye
have a nice weekend! bye byeClassical Lin power amplifier circuit (5 BJT)
. Feature: the drivers are doubled to lower the voltage. Can be changed to silicon (BD139 / 140). At the outlet, you can use PNP silicone TIP42, TIP36, TIP2955, etc.
Change the bias. Performance and reliability will improve.
Prototype Dual CV20. A variant on silicon with a change in the conductivity of transistors.
DUAL CV20 SM DE Service Manual download, schematics, eeprom, repair info for electronics experts
Change the bias. Performance and reliability will improve.
Prototype Dual CV20. A variant on silicon with a change in the conductivity of transistors.
DUAL CV20 SM DE Service Manual download, schematics, eeprom, repair info for electronics experts
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