[TowerTalk] Bandpass Filters

[Dubovsky, George]

I have been looking at the W3NQN filters recently, with an eye towards building two sets, but I have found that high-voltage NPO caps are not as common as they once were. Can anyone suggest a distributor that still handles either the Tusonix parts referenced in NQN's article, or an equivalent substitute? Digi, Mouser, Newark and Allied didn't seem to work.

73,

geo - n4ua

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of Peter Forbes
> Sent: Wednesday, January 09, 2008 8:20 PM
> To: Alfredo Vélez WP3C
> Cc: towertalk at contesting.com
> Subject: Re: [TowerTalk] Bandpass Filters
> 
> Alfredo,
> 
> How much power do you intend running through the bandpass filters?
> 
> If you are using the newer rigs which can run 200 watts out, then you
> might
> have trouble with the Dunestar and ICE filters drifting with temperature
> increase.
> 
> The W3NQN filters are rated for 200 watts and do the job well.  I have
> built
> copies of the W3NQN filters for our IOTA operations over the last 4 years
> from VI5BR, VI5PN, VI5WCP and VI3JPI and they work very well.
> 

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