[Test-Equipment] Q and filters

[Carl]

Ive built several of his passive filters to get rid of high frequency hiss, 
they work great compared to noisy and distorted active filters.

Carl
KM1H


----- Original Message ----- 
From: "Brian Burns" <brian at lessonsinlutherie.com>
To: "'Discussion of Electronic Test Equipment'" 
<test-equipment at mailman.qth.net>
Sent: Saturday, June 21, 2014 2:17 PM
Subject: [Test-Equipment] Q and filters


> Hello All,
>
>
>
> Here is a well illustrated article on "Q":
>
>
>
> http://www.radio-electronics.com/info/formulae/q-quality-factor/basics-tutor
> ial.php
>
>
>
> Ed Wetherhold, W3NQN sells a kit for a passive audio filter for CW that 
> gets
> rave reviews on eham:
>
>
>
> http://www.eham.net/reviews/detail/58
>
>
>
> If you want to build filters from scratch, Ed has written a bunch of QST
> articles. You have to be an ARRL member to access them, but that's well
> worth the $35. Just enter his name and call sign in the appropriate box on
> the ARRL search page, select QST, and leave everything else blank. The
> search function will bring up all of Ed's articles, going back to the 
> stone
> age-he is a really old timer.
>
>
>
> Cheers,
>
>
>
> Brian
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ---
> This email is free from viruses and malware because avast! Antivirus 
> protection is active.
> http://www.avast.com
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2014.0.4592 / Virus Database: 3972/7717 - Release Date: 06/21/14
>