🚀 go-pugleaf

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.
>>>
>>> Have fun.
>>> Dave.
>>> -- 
>>> ================================================
>>> Check out my Electronics Engineering Video Blog & Podcast:
>>> http://www.alternatezone.com/eevblog/
>>>
>>>
>> 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.
>>
>> Bob 
>>
> 
> That's usually the best way to ground shields.
> 
> John
> 
> 

IIRC head signals mostly went via twisted pair. If they had a shield as well we 
would certainly not ground them on both sides.

Tony