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www.cwaudio.com

    http://cwaudio.com/eng/about.htm
    Profile of CW Audio Consulting Services Hubertus Christian Wiedenbeck is the founder and owner of CW Audio Consulting Services. He is in the Pro Audio business for more than 30 years and is specialised in sales and marketing of studio, PA and PI systems, monitoring, and audio consoles for theatres, concert halls etc.

www.cwaudio.com

    http://cwaudio.com/
    cwaudio is a consultant in pro audio wiht its' headoffice in Frankfurt, Germany. We offer different services from investor relations to product placement.

Audio CW Filter - PARA

    https://www.para.org.ph/docs/CW-Audio-Filter.pdf
    A audio cw filter is a way to add narrow audio filtering to the audio output of a transceiver or receiver, the audio filter is usually placed between the audio output from the transceiver phone socket and the operators headphones or speaker, using an audio

CW Audio Filter – Rob's Blog

    https://robs-blog.net/2015/12/15/cw-audio-filter/
    CW Audio Filter. When it comes to direct conversion receivers, to get good selectivity you need to use good audio filters. There is no IF so you cannot use narrow crystal or collins type mechanical filters to narrow up the bandpass and filter out all those close by signals. For CW use this is important, because you might have 20 different ...

A very simple and very effective passive CW audio filter

    http://ki3u.byethost3.com/Radio-PhysicsDIR/ecomDIR/Simple_passive_CW-filter/Simple%20passive%20CW%20audio%20filter.html
    audio voltage when the filter is in use. a-d.) back off on the volume. Insert the CW filter into the audio output line, keeping the AC Voltmeter connected across the line at the INPUT side of the filter. With the filter's bandwidth wide open retune the receiver for maximum loudness as indicated by the AC Voltmeter.

CW AUDIO FILTER SHOWCASE - QRQcw - Ning

    http://qrqcwnet.ning.com/forum/topics/cw-audio-filter-showcase
    Here is a software CW AUDIO filter setup on LINUX using an array of LOW PASS and HIGH PASS filters. If playback doesn't begin shortly, try restarting your device. Videos you watch may be added to the TV's watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

K4ICY's Home Brew CW Audio Filter

    http://www.k4icy.com/cwfilter.htm
    Home Brew CW Filter: If you are just getting into CW and you are starting off with an older radio or QRP set. Newer radios may come equipped with filters for narrowing the audio passband or digital signal processing (DSP) to clean up unwanted noise. But you may be faced with trying to pick out a wanted signal from a swamp of others.

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