HT Smoothing Condensers

[Valvebloke]

... I agree about nano. I don't remember the days when it wasn't in common use in electronics, and have never come across a historical explanation for the apparent opposition to it, but am glad that I didn't have to navigate those waters...

I do too. I spent some time making nanosecond (and subsequently picosecond and femtosecond) pulses for a living and one of the primer books in the field was Millimicrosecond Pulse Techniques by Lewis and Wells. This even sounded strange back in 1980. Perhaps one reason for that was the fact, well-known amongst those of us who actually had to work with physical kit, that the speed of light in vacuum is pretty accurately (within a couple of percent) one foot per nanosecond, indicating that, like the foot, the nanosecond is a 'natural' unit   .

VB