?

There is a short history of UL at:
<>
I did search further but there rare many citations included in the
article, one of them may have information on when UL began to approve of
home radios. UL is a United States business but there are similar
organizations in Canada and elsewhere. It is NOT a government agency but
works with OSHA and others. It seems to me that my S38-B had a UL mark
on the back. Its gone now so I can't look. My S-38B was c.1949.
Non-consumer products, i.e. industrial electrical goods, do not
need UL approval, or didn't in the past, perhaps changed now since OSHA
has authority over them. Probably all on the web somewhere.
I suspect old UL standards are around if you do a thorough enough
search.

On 11/5/2024 4:14 PM, don Root wrote:

Jim, thanks for finding this

In reading *above *this quote ?it says the quote was from the 1937 ?for
Australia.

I have been wondering when UL made and enforced similar statements.

I looked and found almost nothing but around 1950 magazines advertised
UL approved lightning arresters.

Was UL giving quiet approval to radios all along?? … And that is just a
question.

Too bad we can’t find old UL standards ..even for household appliances

--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998