[Amps] Question on by-pass capacitor TYPE

[Carl]

A couple of .0022 6KV or more, not the China Ebay crap, discs will do it for 
10-160.

Ive never used the Russian hockey pucks but have heard other EU and Japanese 
versions are not so good on the higher frequencies as many were not made for 
QRO RF.

Maybe someone has a guideline on what the markings and applications are.

Carl
KM1H


----- Original Message ----- 
From: "peter chadwick" <g8on at fsmail.net>
To: "N1BUG" <paul at n1bug.com>; "'Amps'" <Amps at contesting.com>
Sent: Thursday, October 17, 2013 10:21 AM
Subject: Re: [Amps] Question on by-pass capacitor TYPE


> Paul,
>
> Polyester film caps aren't that good, because generally, they have too 
> much inductance, the dissipation factor is high so they cannot carry much 
> RF current, and even a 0.1 microfarad ceramic disc with negligible 
> internal inductance but a half inch lead each end will be resonant at 
> about 3.5 MHz. Above there, it all looks like an increasing impedance with 
> frequency.
>
> Inductance and dissipation factor are the real problem.
>
> 73
>
> Peter G3RZP
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