I happened to stumble on this site from a guy in the UK, while I was looking for some radio bits on the Net (OK, so I did get a wee bit way-laid) :
Mike's Electric Stuff

Trumpy:
Thanks for the link! Interesting items.

Hey Trumpy.,,

Thanks for the link that is cool to see old stuff like that.

I did see some mercury vapour converter do show errine green glow color some case it will spook ya.

Merci,Marc

Mike, I stumbled on a site not too long ago showing mars (mercury arc rectifiers) still in operation. I'll post a link when I find it.

simon.