[ARC5] ARC-2 Information

[Hubert Miller]

Then according to what you say, the tuning capacitor frame should be 50/50 chance of being hot, right?  And in the 1940s thru 1960s 
AA5s, it is not. How not? "Floating chassis", as I described. I could not ascertain what year URL mandated this circuitry. I am not talking 
at all about 3 wire appliances. I am talking about the common AA5 circuit, 7 pin miniature tube. In the floating chassis, yes you can get a 
buzz or small shock, depending on the size of the "isolating capacitor".
Oddly, the first website I visited to verify this, repeats the "hot chassis" canard. This is the website you reference below. The author 
of the pages, I gather does not fully understand his subject. 
From your second webpages suggestion, do not overlook this: 
"The hazard was eliminated from later sets by the use of an internal ground bus connected to the chassis by an isolation network. Underwriters Laboratories required the adoption of the floating chassis.."
I do not know what exactly "later sets" means, but I think from what I have seen it means 1940s on. This wasn't something just thought up in the 1970s! 
I have dozens of various brand AA5 service data booklets, but wouldn't you know it, I cannot find a one right now, they are all hiding.
-Hue Miller

>-Hue,

Sorry, but you're simply wrong about this. I am speaking from direct experience. Only two wires power up the classic AA5. No such thing as a distinction between ground and a chassis. You are confusing later safety practice with decades of history that preceded three-wire power cords.

See, for example,
https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.angelfire.com%2Felectronic%2Ffunwithtubes%2FAA5-1.html&data=02%7C01%7C%7C2ec25d95643f49aed9a708d852d40f9d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637350418027791217&sdata=xh8YXTForvsU5%2B7N%2BGfN4H3j9BQdaCfSQiopVeNCQjg%3D&reserved=0.

Or the wikipedia entry on the AA5.

--Tom