[Milsurplus] When is a Cap Not a Cap? Redux

[C.Whitaker]

de WB2CPN
So how does one measure the RF power going through a capacitor?
What are the parameters?
73  Clete
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On 9/17/2013 7:19 AM, David Stinson wrote:
> Some time ago, we had a discussion about "when is 150 pFd NOT 150 pFd."
> I had purchased some 100 and 150 pFd ceramics to us in a 
> series-resonant LC circuit
> carrying about 10 watts of RF to an antenna.
> I believe it was this cap:
> http://www.digikey.com/product-detail/en/CK45-R3AD151K-NR/445-2715-ND/1007601 
>
> While 150 pFd silver micas from my junk box worked fine,
> these brand-new ceramics disappated more than half the power
> I sent through them.  The whole bunch was worthless for this application.
>
> I wanted to review that thread, but can't find it.
> Are there any thoughts on why this is the case,
> and how I might avoid this mistake in the future?
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