tcpip said:Aren't all discrete transistor preamps Class A? I thought only (some) opamp-based preamps operate in Class B.
No, it depends on output stage design, regardless discrete/IC technology.
evilspirit said:[BPre-amp links.....[/B]
Impressive! Very well executed.
Can we have some schematic details...?
Jan Didden
Oh, okay. I was under the impression that anyone making line-level circuits would always build Class A to avoid crossover distortion. I thought crossover distortion (and Class B) was a necessary evil tolerated only in power amps to get high efficiency and power outputs.PMA said:No, it depends on output stage design, regardless discrete/IC technology.
Sorry if this is off-topic....
evilspirit said:because of the high quietude carrent
I haven't calculate, and I easily forget, but are you sure 45mA requires such a big heatsink???
Assuming you are using +/-15V for supply rails, your quiescent current of 0.13A is dissipating 3.9W of power. Is that figure high enough to require such large heatsinks? Given my limited knowledge, I would have used something perhaps one-tenth that size. Not that there's any harm in having a larger heatsink, just asking...evilspirit said:final assembled static currency 130MA per channel
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