[Amps] tank coil heating

[R L Measures]

On May 11, 2006, at 7:55 AM, S. J. Blackwell wrote:

> The current carrying capacity does not correlate well with voltage or
> capacity in question. It would also be wise to parallel several  
> caps rather
> than having one cap carry all current.

I have seen commercial transmitters with 16 paralleled NPØ doorknob  
caps mounted between two square plates.

> You might be surprised at the current
> carrying ability of say a 200pF cap and a 50pF cap (both RF rated)  
> at a
> given freq. Most of the time they are remarkably similar, or may  
> actually be
> the reverse of what you might expect.
> 73,
> Sam, W5LU
>
>
>> From: "Partain, Chuck" <Chuck_Partain at maxtor.com>
>> To: "Bill Turner" <dezrat at copper.net>, <amps at contesting.com>
>> Subject: Re: [Amps] tank coil heating
>> Date: Thu, 11 May 2006 10:06:22 -0400
>>
>> another box of stuff to bring back from dayton :)
>>
>> -----Original Message-----
>> From: Bill Turner [mailto:dezrat at copper.net]
>> Sent: Thursday, May 11, 2006 9:42 AM
>> To: Partain, Chuck; amps at contesting.com
>> Subject: Re: [Amps] tank coil heating
>>
>>
>> ORIGINAL MESSAGE:
>>
>> At 04:54 PM 5/10/2006, Partain, Chuck wrote:
>>
>>> are these suitable for what I am doing? hell, its 30kv! why warm?
>>
>> *********** REPLY SEPARATOR ***********
>>
>> Voltage rating has nothing to do with current carrying capacity, as
>> you have learned. Get a capacitor rated for the expected current, or
>> better yet, an air or vacuum type, both of which have essentially
>> unlimited current capacity at amateur power levels.
>>
>> Bill, W6WRT
>>
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>
>
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R L MEASURES, AG6K. 805-386-3734
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