[ARC5] Hallicrafters S-38 is dangerous

[J Mcvey]

In AC.DC parlance, "chassis" is what they refer to the floating B- wiring buss (I use the term "buss" loosely) . I was taken to task from folks on this terminology so I am using it as I was told was proper.  "case" or cabinet is the metal box.Pull up a schematic for the the s-38 and you will see a cap that goes between the standard conical ground symbol to the fork which represents the case.I think there is one that goes from the antenna ground terminal to the B- chassis as well. Both have a very good potential to "light you up".
Don't take my word for it. see for yourself...
 


     On Tuesday, November 17, 2015 4:34 AM, "hwhall at compuserve.com" <hwhall at compuserve.com> wrote:
   

 >
Those old wax/paper caps are electrically leaky and couple the "hot chassis" B- buss to
the metal cabinet. If it shorts, the cabinet could have the full mains
potential. Bad things can happen...
>

I'm getting confused maybe. Are y'all using 'chassis' and 'cabinet' words the same? IIRC from when I safed my S-38E, one side of the line cord via the on-off switch connected to the B- buss & the buss was cap (& resistor in parallel) coupled to the chassis but the chassis was insulated from the cabinet by non conductive fittings so that the metal cabinet was floating.

 

Wayne
WB4OGM
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