[TCML] Terry filter quick questions
glau1024 at gmail.com
Thu Jun 3 18:52:30 MDT 2010
1) If both wire-wound and film resistors were available with
comparable ratings, I would choose film, but I don't think I would be
able to justify that, analytically. Since 100W film resistors are
rather uncommon, wire wound units are commonly used.
2) The resistors, in combination with the caps, form a low-pass R-C
filter, to attenuate VHF high voltage transients from getting to the
NST. The resistors without the caps would not do this; the resistors
must be used with the caps. The long story if available on my NST
protection circuit web page:
3) The recommended resistance is 1000 Ohms or 1K Ohm, not 1000K Ohm.
A 100 Ohm resistor would not be effective, and a 1000K (1Meg) resistor
would waste more power than it passes.
Regards, Gary lau
On Thu, Jun 3, 2010 at 8:01 PM, <jhowson4 at comcast.net> wrote:
> Hey guys, quick question on terry filters.
> 1) Are wire wound or film resistors preferred
> 2) What exactly is the purpose of those big resistors .
> 3) Is the 1000Kohm rating imperative? I have some 100W 100ohm resistors...Will these work?
> Thanks in advance,
> John "Jay" Howson IV
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