Re: Sony-STR3800L. Output transistors.
When you compare Ft and Hfe values of different devices, be suspicious, and look carefully at the conditions the specs apply to. Sometimes you're lucky and see that devices are more similar than first meets the eye, sometimes you lose.
It's easiest to compare if you can find plots of Hfe and Ft versus collector current.
Spot values depend somewhat on which spot someone picks. They usually go for the best looking number, but best for whatever target market they have in mind.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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