Mosfet mist?

Never ever worked test /probe. Did some Reliability (1000 hour burn in) on some tests I ran with induced leaks in a vacuum system, but NEVER probe.
I think that would be some valuable information about some of the differences between MOSFET and BiPolar designs.

I was into diffusion.....oxide growth (insulator) and implant diffusion. Also spent lots of time with metalization. Aluminum interconnects and various backmetals and some platinum silicides. I also worked in photo / etch but that wasn't where my heart was.

One entire fab I worked in was sold to the Chinese. Every machine, valve, pump, filter, bit of plumbing and microscope. The works right down to the flooring. I even caught 'em photographin the Specification Book.....A VERY NO NO thing to do. BUT, the bosses didn't give a XXX.

Sorry Wolf.....a typological error.

"Mosfet Mist" is a phrase coined by that noted 90's adult film star, Linn Klimax.

Magfan all that sounds familiar as it seems all engineering and prototyping is done in the states then once the wafers have a proven yield it seems to go offshore.

There is a fab within 25 miles of here with a capacity of 20,000 (!!) 6" wafers per week. At least. The class 100 area is almost 2 acres....no kidding.
They make power devices, FREDS, IGBTs and who knows what else.

I carried a pedometer with me for a week or so and even before the expansion, never walked LESS than 3 miles per day.

You simply would not believe the electric bill......and the low power factor surcharge. Each furnace, for example, has a 100 amp breaker. The same as the service to my house. And....they come 4 to a 'stack' and there quite a few stacks. Each implanter has a transformer the size of a Smart Car.....only a slight exageration...but you get the idea.

Many companies use 'foundaries' for overflow capacity. Also, companies like Intel simply don't want the mask set (layer by layer blue print, if you will) out of there grasp. All Intel is made in the US of A.

Many comodity devices....like OPAMPS are made in these foundaries and pretty much sold by the bushell.

I own a B&K ST-140 that I use as a backup amplifier. Stock, it does sound really warm, and a little undetailed.

However, a quick look at the schematic and you'll see a gross little electrolytic used as the input capacitor. I replaced this (and the power supply bypass caps) with some Elna Silmics. It was a big improvement in the sound, making the amplifier sound more open.