/diy/ - Do It Yourself

>>1492496
I know I effectively did your homework for you but here's a two transistor amplifier that should meet all the design requirements. It attempts to keep distortion low with negative feedback but it's still 3.1% so not great. Not a terribly well refined design but a good starting point.

>>1492534
Not a very helpful answer and not a very good one. op-amps may dominate low frequency electronics but transistor amplifiers are still commonly used and the knowledge of how to properly design them is still worthwhile. In RF electronics you never see op-amps. Microwave amplifiers are built with simple common emitter amplifiers, of course using BJTs with GaAs junctions and other special materials to allow them to operate at 10s or 100s of GHz. op-amps are just too slow and transistors are not. Hell even for VHF band stuff transistor amplifiers beat out op-amps. A basic 2N3904 jellybean op-amp has a gain bandwidth product of 300MHz which is plenty high enough to allow it to be used in the FM band. Most op-amps could only dream of reaching 100MHz. Many of them barely have any gain at 100kHz open loop. There are some high speed op-amps on the market that are pushing into the 100s of MHz range but they are expensive and offer no major advantages to transistor amplifiers. I won't dispute the usefulness of op-amps under 100kHz but transistor amplifiers are still useful and worth learning about.