Re: Tone Controls
Overkill or not depends on the variability of the mains supply and how close to the voltage limits the PA transistors are run... and that includes the second breakdown mode which wasn't fully understood until after the genesis of the 303.
We've long been lucky in the UK with a pretty well regulated mains supply free from nasties. With early 2N3055 running that nominal voltage in an amplifier to be exported around the world, having a regulator to absorb the mains variations turned out to be a good idea.
The 303 was probably the first fully accepted transistor amplifier. There were plenty earlier amps, but they were rather poor compared to the 303 and failures were expected with them.
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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