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The link I sent discusses the history of UL and mentions the Canadian equivalent. UL is Underwriters' Laboratories, it is part of the Fire Underwriters organization, which is a group set up by

Richard, the link is sent previously from [UL solutions] gave the best info maybe but not enough to answer the questions. Some ads for PA Amplifiers had “underwriters” [UL ??] approval in 1933

5mA is supposed to be the maximum "let go" current. Not sure if this is still correct (I almost said current). The idea being that when you grab something that causes greater current to flow in the

There is a short history of UL at: <https://en.wikipedia.org/wiki/UL_(safety_organization)> I did search further but there rare many citations included in the article, one of them may have

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

See: Radiotron Designers Handbook, 4th Edition, page 1268, (C) Earth Connection " Power unitsand sets of the transformerless type shall have the live parts of the inner structureisolated from the

Hallicrafters SX-117 for Sale Nice cosmetic condition. All tubes test fine on my Sencore TC-142. Strong audio with no ripple but the only thing I could hear was the IF band (weakly). *Some signal

Richard, I was quoting you From Oct 28 RE “Is there an equivalent in the B?” I would say NO. In version C they lifted B-minus off the chassis, but not really completely; one of the things

I also saw that resistor and I also don't really understand why its there. Is there an equivalent in the B? Its possible it has some effect when the reciever is powered by DC or perhaps limits the

Richard, On Oct 28 in topic Wanted: Schematic for S-38E you said "The C also shows a 470K resistor from the hot side of the switch to the cabinet ground. Not sure why. "

My S-38s (no suffix), EC-1s (no suffix) and S-41 all have a grommeted hole in the chassis for the line cord. I can't get to my S-38C yet. 73, Gary - W6GVS ________________________________ Sent:

My S-38 (no suffix) with a metal bottom cover has no back cover, either. The line cord comes through the chassis in what appears to be an original round hole. My Echophone EC-1A has a similar cord

My S-38 is missing the back cover. The line cord comes from the chassis through a gland, no sign of there ever having been a connector there. Since I don't have the back cover I don't know for

Ahhh, now I get it, the SO-1 captured to the chassis while the PL-2 captured to the insulated back cover going down over the chassis apron Maybe the B C D E are all like that? But only B has it on

This appears to be a photo with the back removed, note the tubes visible. The mating connector is riveted to the back cover. -- Richard Knoppow Los Angeles WB6KBL SKCC 19998

I recently read “if anyone knows of any news item concerning someone electrocuted by an AC/DC radio perhaps they could post a link. I have never heard of this happening in real life. ..etc

Well Richard, then maybe yours was an S-38B mark 2 or run2 or whatever ? This below is snipped and edited from the BAMA version B that I downloaded some time back. I know about what you are

My late, lamented, S-38B had a TV type power connector on the back. The female part was riveted to the back cover so as to form an interlock. One needed a TV type cheater cord to connect the

?While following Glen’s S-38e topic which we hijacked for S-40’s discussions, I came upon the S-38B manual on BAMA which shows and lists PL-2 plug in the AC line cord, and SO-1 on the back of

I, unfortunately, had to scrap one of these receivers owing to animal infestation and severe chassis corrosion. I have the following good parts, as removed and checked. Complete knob set, both coil