[RTTY] bandpass filters

[Jeff AC0C]

I've built one of those that we used in FD last year with excellent results. 
Pretty easy to build but you really need a VNA and a lot of time to get the 
thing tweaked for it's maximum performance.

It's a solid design; I think several teams used the design in WRTC'14.

73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-----Original Message----- 
From: Ron WT7AA
Sent: Saturday, March 19, 2016 11:35 PM
To: Jeff AC0C
Cc: rtty at contesting.com
Subject: Re: [RTTY] bandpass filters


> From: "Jeff AC0C" <keepwalking188 at ac0c.com>
> Date: Fri, 18 Mar 2016 20:19:11 -0500
>
> The best adjacent band rejection I have measured is off the Array 
> Filtermax
> 6- band unit.  Amazing.  They will run 200w just fine.
> ...
> K9YC had a pretty good comparison in NCJ a couple of years back which 
> covers
> all of these save the Filtermax.  If you are going to lay out the bucks 
> for
> this and are are serous about So2r it's well worth hunting the article 
> down.

When I looked into this awhile ago, I found
http://un7lg.shawwebspace.ca/blog/post/high_quality_200_watts_hf_triple/

Seems interesting, anyone try these?

WT7AA
Ron
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