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SCAF audio filter build – Dhakajack
http://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 FT-817nd.
The Idiom Press SCAF-1 Audio Filter
https://www.hamsupply.com/wp-content/uploads/2016/07/SCAF_Review.pdf
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. It measures
Ham Supply LogiKit SCAF-1 – Bandpass Filter
https://www.hamsupply.com/logikit-scaf-1-noise-filter/
SCAF-1 does for your audio stages what crystal or mechanical filters do for your IF stages. SCAF-1 has two output jacks (not switched), and will drive headphones or a speaker. Kit or Pre-Wired — Your Choice! The Ham Supply / Idiom Press SCAF-1 is offered as a kit or is available pre-wired. Kit construction is typically a one evening project.
eHam.net
https://www.eham.net/reviews/view-product?id=3075
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 frequency, and no white noise. It is the perfect partner for your crystal or mechanical filters.
Logikit SCAF-1 - the Deceptively Simple Filter
https://qrznow.com/logikit-scaf-1-deceptively-simple-filter/
The new SCAF-1 filter from Idiom Press makes your radio listener friendly, whether you are an SSB or CW operator. Modern IF filtering design is the best ever. But the engineer still has to design an audio output that will accommodate the widest signal the radio is …
Simple Lowpass CW SCAF Filter - QRPGuys
https://qrpguys.com/simple-cw-scaf-filter
QRPGuys Simple Lowpass CW SCAF Filter . This product has been retired. We no longer have boards available. 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 individual cw stations can be …
LogiKit SCAF-1 | QRZ Forums
https://forums.qrz.com/index.php?threads/logikit-scaf-1.599693/
Two in series used in the SCAF audio filter. Stu AB2EZ modified it to be able to be used to limit the high frequencies going into a transmitter should you wish to do so. Adjustable from very narrow to about 9 KHz bandwidth wide signal (4.5 KHz audio).
Skar Audio
https://www.skaraudio.com/
Skar Audio is a leader in car audio amplifiers, subwoofers, speakers, and more. We focus on the innovation and development of new, superior, car audio products.
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