On Thursday, November 8, 2018 at 6:51:21 PM UTC-5, Phil Allison wrote:
wrote:

Phil Allison wrote:



Well, they were standard & widespread in the 1990s.

** Live chassis tube TVs and radios " standard & widespread " in the 1990s ????

Live chassis TVs were very common in the 90s.


** But not TUBE sets as the above requires.

I have a 1990s 12 inch GE color portable where the whole chassis is live and only isolated by the antenna balun.


FYI:

The OP did NIT even mention "live chassis" so his post was wrong and so is yours.

I was responding to your mention of 'hot chassis' not the OP's.
What the OP mentioned is irrelevant.


** Bull****. I was responding to the OP post - so what he wrote is totally relevant.



Contemporary use of 1:1 isolation transformers would be for
servicing devices like SMPSs.


It removes the direct path to ground of the electrical power,
significantly reducing the chance of death.

** That is wrong.

Using an isolation transformer allows one to connect the common
rail ( or any other point) of an off-line SMPS to safety ground.
After which you can use a scope in the normal way to investigate
various waveforms, maybe small ones like MOSFET drive signals.


One can, but they are also used to reduce shock risk.


** Biggest safety myth out.

Using an isolation transformer unnecessarily INCREASES electric shock risk.

The UK government certainly disagrees with you.



** More arrogant bull****.



We have used isolation transformers for decades in bathrooms ....


** FFS you congenital context shifimg **bull****ter **



.... Phil



Jeebus Phil you were doing so well recently.