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Old 23rd April 2013, 06:06 AM   #11
KVP is offline KVP  Belgium
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Join Date: Aug 2010
I wouldn't worry too much anyway about your English, it's more than OK ;-)
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Old 23rd April 2013, 02:02 PM   #12
FQR is offline FQR  Germany
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Join Date: Nov 2012
Location: Bad Birnbach, Bavaria
Hello, KVP!

Thanks very much, glad to read this! My sorrow about that decreases gradually. And it seeems to be easier bit by bit, with every post.

One more mistake: In the thread, I mentioned (where Quasi warned of higher rail voltage) there was another schematic than Actrk 600, it was named "Atrk-nmos". There P-channel mosfets rated at 200V were used.
This two diagrams I have mixed up - sorry! I also donīt know which of the two would be easier to convert. On the Actrk diagram there are MJE350 used as drivers, theyīre rated higher (-300V), but I donīt know if higher voltage is possible therefore, cause the small signal BJTs are rated rather low, and at the schematic itīs marked again, that maximum is 90 Volts.
Please, couldnīt anyone give me tips for usage of other transistors, or values and position for adding resistors, to make say maximum of 115 V possible?

Greets,

Fred
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