[AMPS] More on the SB220

[km1h@juno.com]

On Fri, 19 Mar 1999 03:04:26 -0800 Rich Measures <measures@vc.net>
writes:
>
>
>
>>
>>Carl wrote:
>>>
>>>
>>>
>>>On Thu, 18 Mar 1999 15:48:44 -0000 Peter Chadwick
>>><Peter_Chadwick@mitel.com> writes:
>>>>
>>>>Could it be that you have a 'flash arc' or 'Rocky Point effect'? 
>>>>Although the voltage may be considered low for a glass tube, the 
>effects 
>you 
>>>>describe fit the description.
>>
>>>An arc in a vacuum would not go BANG.
>>>Neither would the opening of a 2W resistor.
>>>
>€  I have seen and heard them explode to bits.  

Not when used in a grid ckt.


>
>>>Sounds like a HV breakdown to me that is external to the tube.
>>
>>There could have been a silent arc inside the tube,
>>with the bang coming
>>from the resistor. IMO a 2W resistor standing in the way of a 
>near-short
>>across the HV supply is very likely to exit with a bang!
>>
>€  What if the resistor is virtually shorted by a few turns of #16 
>copper 
>buswire?

Virtual what?

73  Carl  KM1H



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