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Re: Neon murder



Subject:  Re: Neon murder
  Date:   Fri, 23 May 1997 20:04:20 Eastern Daylight Time
  From:   "Mad Coile{" <ts5815-at-devrycols.edu>
    To:   Tesla List <tesla-at-pupman-dot-com>


>Subject:  Re: Neon murder
>  Date:   Wed, 21 May 1997 07:36:36 +0000
>  From:   "John H. Couture" <couturejh-at-worldnet.att-dot-net>
>    To:   Tesla List <tesla-at-pupman-dot-com>
>
>
>At 06:56 AM 5/20/97 +0000, you wrote:
>>Subject:  Neon murder
>>  Date:   Mon, 19 May 1997 23:23:20 -0400 (EDT)
>>  From:   ADatesman-at-aol-dot-com
>>    To:   tesla-at-pupman-dot-com
>>
>>
>--------------------------------  Big snip
>
>
>
>>the fuse, or I need to think about this much harder.
>>   As an aside, the burned side can still generate a really small spark
>>when
>>grounded to the case.  Is it truly burned out, or is this maybe a case
>>of the
>carbon arcing I've read about (that can be fixed by baking in the
>>oven)?  I
>>can dream!
>>    Thanks for the help.     Aaron Datesman
>>
>--------------------------------------------------------------
>
>  Aaron -
>
>  You need to think more about this problem. Most coilers do not
>understand
>why neon transformers fail. Most coilers also do not understand why RF
>chokes in the microhenry range will protect the transformer.
>
>  The problem is that the spark in the operating gap produces transient
>voltages that can easily puncture the insulation in a neon. These
>transients
>are in the nanosecond range and are partially blocked by a choke of
>about 30
>microhenrys. Most coilers believe the chokes are for the peaks of the
>operating dampened wave voltage which would require millihenry chokes
>and
>are not a problem. These peaks are usually less than twice the rated RMS
>secondary voltage which the neon windings can handle. 
>
>  

John, how do you suggest building a 30uH choke? What works best, flat or
cylinderical spiral, and does it get hot? Wire size?

Thanks in advance for any help.
Tristan Stewart