🚀 go-pugleaf

On Thu, 25 Jun 2009 19:50:09 GMT, Rich Grise <richgrise@example.net>
wrote:

>On Wed, 24 Jun 2009 22:01:51 -0700, John Larkin wrote:
>> On Wed, 24 Jun 2009 21:42:07 -0700, <castlebravo242@att.net> wrote:
>>>"David L. Jones" <altzone@gmail.com> wrote in message 
>>>news:h8B0m.53620$FI5.3564@newsfe12.iad...
>>>> Check out a rather unusual phenomenon you can see on your oscilloscope in 
>>>> my latest blog (#14):
>>>> http://www.alternatezone.com/eevblog/
>>>> See if you can get it to happen on your scope!
>>>> I'll offer a free subscription to my blog for the best screen shot posted 
>>>> :->
>>>>
>>>> Oh, and the probe doesn't have to be shorted either.
>>>
>>>When I worked a Century Data we had a problem with our new reel to reel 
>>>vaccuum column tape drive when ever someone would walk by the drive when it 
>>>was reading it would get data errors. The problem was that the shield on the 
>>>cable from the heads to the preamp was grounded on both ends.
>> 
>> That's usually the best way to ground shields.
>
>When I was a kid, my brother built a Heathkit TOOB amp; in the low level
>circuits, they only ever grounded one end of the shields.
>

Inside a steel chassis pan, it wouldn't matter. But then Heathkit was
hardly an authority on signal management.

John