🚀 go-pugleaf

ehsjr wrote:
> Joerg wrote:
>> 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.
>>
> 
> Brings back pleasant memories. I donated my HW101 to the Boy Scouts
> radio club many years ago. I wish I still had my HW 16 - lots of wee
> hours CW with that (my first) rig.
> 

At least you've got the memories, that's all that really counts. I 
donated my HW101 to a ham in former East Germany after the wall fell. 
Back then they didn't have the funds to buy western quality gear. I kept 
the older HW100 because that has a white-knuckle supply, direct 
rectification and Cockroft-Walton cascade from 230VAC mains. Plug it in 
the wrong way ... *BAM*. He got the good set, with original power supply 
and the whole thing looked hardly used, almost like new. He was really 
happy.

-- 
Regards, Joerg

http://www.analogconsultants.com/

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