hi..i built some single ended designs.i made this circuit and i can say its the best i have heard.and i have some questions...
1-)how we decide the max or best voltage supply value of single ended symmetrical class a amps?(for this amp with irfp240 transistors)
2-)i replaced irfp240 instead of irfp 150 in this circuit.mids and trebles increased and bass reduced..but i always see positive offset of 150mv..i can reduce it to 100mv only by playing trimpots..i can not reduce it anymore..which values of resistors should i change?
3-)what is the technical criterias of sound quality for transistors?
is it low input capacitance?or low Qg?
thanks
best regards
umit
1-)how we decide the max or best voltage supply value of single ended symmetrical class a amps?(for this amp with irfp240 transistors)
2-)i replaced irfp240 instead of irfp 150 in this circuit.mids and trebles increased and bass reduced..but i always see positive offset of 150mv..i can reduce it to 100mv only by playing trimpots..i can not reduce it anymore..which values of resistors should i change?
3-)what is the technical criterias of sound quality for transistors?
is it low input capacitance?or low Qg?
thanks
best regards
umit
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umut1001 said:is there anybody here?thanks
You don't want me to comment a diffpair...
I bet there is more than one.umut1001 said:...there is not a single ended transistor amp works at 200v dc.i meant what is the max voltage value for se class a amps for only one pair of irfp240....
umut1001 said:.......how we decide the max or best voltage supply value ....... with irfp240 transistors)
AndrewT said:for irfp240 the maximum supply voltage is 200Vdc.
The ideal voltage will probably be less than this maximum.
what's to understand?umut1001 said:i dont understand
Re: Adjusting R4 value you may reduce your off set to zero
Change R1 to 2.5k!
Then play with R3's value if needed...
but i always see positive offset of 150mv..i can reduce it to 100mv only by playing trimpots..i can not reduce it anymore..which values of resistors should i change?
Change R1 to 2.5k!
Then play with R3's value if needed...
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