[ARC5] Hallicrafters S-38 is dangerous

[Richard Knoppow]

    This accounts for the use of different symbols for the two 
"grounds".  The chassis, i.e. DC return, is the common spade shaped 
lines while the cabinet is shown as a straight line with slanted lines 
attached, that is a "broken" section of a ground plane. You don't often 
see both used in a diagram but there are places where there are two 
different grounds.  Both symbols are shown in charts of schematic symbols.

On 11/17/2015 11:21 AM, hwhall at compuserve.com wrote:
> 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...
> That's interesting about the parlance, I hadn't heard that before that I can recall. I'll keep that in mind. I  see that my S-38E MkII schematic identifies the conical ground symbol as being the B- buss and the fork shape one as the chassis. It looks like the wiring (and maybe the symbol use?) changed from the original S-38 to the later S-38E models.
>
> Wayne
> WB4OGM
>
>   
>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL