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SCAF audio filter build – Dhakajack
https://blog.templaro.com/scaf-audio-filter-build/
SCAF audio filter build I have a few CW rigs that have lousy filtering. Rockmites and other low part count direct conversion rigs naturally don’t have much in the way of selectivity, but this is also (unfortunately) true of my unmodified Yaesu …
The Idiom Press SCAF-1 Audio Filter
https://www.hamsupply.com/wp-content/uploads/2016/07/SCAF_Review.pdf
the filter is in or out of the circuit. The knob sets the low-pass filter’s cutoff fre-quency, which ranges from 450 Hz to 3.5 kHz. The SCAF-1 rolls off, or atten-uates, audio signals at 96 dB per octave (audio frequency doubles or halves by octaves) above whatever cutoff fre-quency is set. Also of importance to me is the filter’s small size.
Ham Supply LogiKit SCAF-1 – Bandpass Filter
https://www.hamsupply.com/logikit-scaf-1-noise-filter/
Using a modern but little known technology called SCAF filtering, the SCAF-1 is an active audio low pass filter offering user control of the filter cut-off frequency, yielding a stunning 96dB per octave roll-off of signals above the cut off …
Simple Lowpass CW SCAF Filter - QRPGuys
https://qrpguys.com/simple-cw-scaf-filter
The QRPGuys Simple Lowpass SCAF Filter is an adjustable lowpass audio filter for cw that can be very helpful for a variety of receivers that lack the selectivity, or receive both sidebands simultaneously to narrow the audio pass band so …
Logikit SCAF-1 - the Deceptively Simple Filter
https://qrznow.com/logikit-scaf-1-deceptively-simple-filter/
Using a modern but little known technology called SCAF filtering, the SCAF-1 is an active audio low pass filter offering user control of the filter …
SCAF Audio Filter - YouTube
https://www.youtube.com/watch?v=C5LdppO01sI
Ham Radio CW Audio Filter
NEScaf Audio Filter | QRZ Forums
https://forums.qrz.com/index.php?threads/nescaf-audio-filter.495486/
SCAF audio filters are designed to limit how much of the audio spectrum will reach your earphones or speaker. In contrast, optional CW filters are narrow IF filters to limit how much of the RF spectrum your receiver responds to (rejecting …
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