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Logikit SCAF-1 - the Deceptively Simple Filter
https://qrznow.com/logikit-scaf-1-deceptively-simple-filter/
It is the perfect partner for your crystal or mechanical filters. And, unlike most audio filters, there is absolutely NO ringing. How do you use the SCAF-1? There are two controls – the in/out switch, and the low-pass cut off tuning control. By turning the single front knob, you set the audio low pass filter cut off frequency anywhere you ...
INTRODUCTION TO DIGITAL FILTERS WITH AUDIO APPLICATIONS
https://ccrma.stanford.edu/~jos/filters/
Example Analog Filter; Capacitors. Mechanical Equivalent of a Capacitor is a Spring. Inductors. Mechanical Equivalent of an Inductor is a Mass. RC Filter Analysis. Driving Point Impedance; Transfer Function; Impulse Response; ... ``Introduction to Digital Filters with Audio Applications'' ...
Radio Communication Filters for sale - eBay
https://www.ebay.com/b/Radio-Communication-Filters/175736/bn_320050
Aormf500 (mf-500) 500hz MF Series Collins Mechanical Filter From Japan. $127.00 New. Kenwood KLF-2 Radio Line Noise Filter. 5 out of 5 stars (5) Total Ratings 5, $37.50 New. $25.00 Used. ... Ramsey AF-1 Ham Radio CW Audio Noise Filter w/ power supply. $97.50. $9.50 shipping. or Best Offer. INRAD (International Radio) #111 Filter for ICOM ...
10 Types of Noise in Audio and how to Get Rid of it for ...
https://blog.accusonus.com/fix-broken-audio/types-of-noise/
Fixing bad crackles afterwards is very difficult. However, small electrical clicks and pops can sometimes be cut out or redrawn using an audio editor. Don't forget, our ERA Bundle Pro contains the ERA Noise Remover, which can easily remove noise from many audio sources. Try …
K4ICY's Home Brew CW Audio Filter
http://www.k4icy.com/cwfilter.htm
response filter the incoming audio at around 750 Hz. The "shoulder" of the response curve is wide enough to allow (700-800 Hz) If you have a different "Side tone" on your rig than 750 Hz, you will first need to zero-beat the signal in bypass mode first, use the RIT on your receiver to "fake" the received tone match 750 hz.
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