I dont know if it's still common practice, but many radios and small TVs in the US in the 1960's & 1970's had a 'hot-chassis' where one side of the AC line was connected to the metal interior chassis. Obviously, these devices had non-conductive (usually plastic) cases. Polarized cords supposedly ensured the neutral side was connected to the chassis, but extension cords etc left it a 50-50 chance it was electrically hot. I cant recall if any of these were UL listed, or not.
You would think that if hot-chassis devices were "safe", then usage of a pseudo-isolation transformer would be safer. I was probably 12 years old when I opened-up my first hot-chassis radio (yes, it was unplugged) and couldn't believe my eyes when I saw the power-connector tied to the large all-metal chassis. And for you vacuum-tube enthusiasts, you may have wondered why there was a tube with a 35-volt filament (35W4). That's because the filaments were wired in-series to the AC line, and the remaining tubes had 12.6-volt filaments. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/cd819a31-c745-4ac8-91a6-a9118b094ffd%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
