The caps on this data sheet are rated for 50VDC or 500VDC. I see nothing
that indicates they are designed to handle power. Are these in the
input circuit or the output circuit?
Data sheets for caps designed to handle significant current and will say
so, and will talk about low ESR, or have graphs showing current ratings.
About a year ago, I bought 18 of this sort of cap to build W3NQN filters
conservatively rated for 200W. I paid an average of about $4 for a wide
range of values, some larger, some smaller, than 100 pF. They came from
a vendor in the UK, where Bob, 5B4AGN found them.
73, Jim K9YC
On 8/27/2013 11:31 AM, John Huffman wrote:
Jim -
That is the only information Ten Tec service gave me. Here is the
data sheet -
http://www.mouser.com/ds/2/188/XC-600144-198731.pdf
I see no reference to ESR. Ten Tec didn't say anything about ESR. How
would I tell the ESR of the capacitor? How would I find the ESR of
the ones used by Ten Tec? What would you do?
73 de K1ESE
John
On 8/27/2013 11:31 AM, Jim Brown wrote:
On 8/27/2013 6:06 AM, John Huffman wrote:
I searched Mouser and found some discs at 100PF and 6KV.
I would not be at all confident that the caps you found will work.
There is the issue of equivalent series resistance -- ESR -- which
dissipates power if the cap is carrying current, which it certainly
is. I bought a bunch of HV caps without knowing this spec for them,
and lived to regret it. Luckily they were in an antenna matching
network where it was easy to see them smoking. :)
73, Jim K9YC
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