🚀 go-pugleaf

John Larkin wrote:
> 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.
> 

Now wait a minute, they engineered darn good stuff. The old HW100/101 
transceivers were among the best ever made back in the tube days. Still 
got one. No noises or buzzes whatsoever and its performance in the 
vicinity of strong signals is stellar. The only not so good thing was 
the two rubber pulleys because they cooked out too fast, but you could 
keep a stash of them in the drawer.

-- 
Regards, Joerg

http://www.analogconsultants.com/

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