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There were 4 "F" cells inside the lantern battery case. You can still buy them (at least as of 2023) but almost all had 4 "D" cells with a spacer at the bottom. I used the lantern batteries with screw

I must have made a typo I meant *Leclanché cell.* **https://en.wikipedia.org/wiki/Leclanch%C3%A9_cell** **Up until alkaline cells replaced the *Leclanché, the *Leclanché was the standard "D" "C"

My father wore a hearing air starting in the late 30's. I recall him having a 45 volt and 1.5 volt battery that he would put in his right rear pocket. These powered the vacuum tubes in the aid. When

I vaguely remember studying Leclanche cells in physics lessons at school in the late 1950s. Leon Heller G1HSM

ANDY IT IS A VERY OLD COMPAGNY IN FRANCE SEE HERE https://www.leclanche.com/fr/a-propos-de-nous/notre-histoire/ FRANCOIS Links: ------ [1] /g/electronics101/message/99789 [2]

Thanks Roy for the book. It is interesting to see the old descriptions. Bertho

Well, that sure got screwed up... The correct URL is: http://rtellason.com/books/TGBOCE.pdf -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this

My grandfather told us of his experience making a carbon arc lamp.? Probably around the turn of the last century. The street lights in town were carbon-arcs.? Periodically they replaced the old

My vague recollection was around 45 V.? But you might have two in series, for 90 V.? I am not sure but I think that was what our AC/DC radio had. Or maybe if you used 22.5 batteries, then two made

I never ever heard of "Lelanche" cells until yesterday. They weren't common, were they? Andy

Insanity! Ditto. When I became more aware of some of the higher-powered LEDs out there I ordered some. I got 10 10W units, the kind with 3 rows of 3, and so far I've built 3 lamps using these,

I used to do that when I wanted to do electrolysis, the ones out of D cells made dandy electrodes. And of course the black stuff in there was a handy source of manganese dioxide, I forget what that

Yeah, lots of details in there. I'd forgotten about how many screwy camera batteries I used to deal with back when, I think that our last film camera (not used in ages) used one of those. And in

I've wondered about that, never saw an A or B cell. (...) I remember those, REAL bright light. You could get those batteries with springs on top for contacts, or screw terminals. Didn't know

I don't much care for that site. They'd had a couple of my pages on there, and got takedown notices from me because of it. They want you to sign up to download, but taking a screenshot was good

Talk about an EMI source that exceeds FCC Part 15 radiation limits! Bet it wipes out RF from DC to light. I had a pair of welding goggles for use with mine and still couldn't look directly at the

A friend's daughter is a trauma physician and calls motorcycles donorcycles. I had too many close calls to count, only one was my fault and that one proved God does look out for fools and

Thank you for correcting my mistake. Proof one shouldn't take codeine cough syrup and post.

BTW, your URL is missing a DOT after www. Here is the "corrected" URL. https://www.tesladownunder.com/WorldsBrightestBike.htm#BikeLights Ken W7EKB

I rode/drove/almost-died-more-than-once on motorcycles for awhile when I was much younger and a bit more stupid than I am now. I have an over-worked guardian angel. Harley-Davidson. Almost big