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Variable CW and SSB audio filter – uBitx
https://ubitx.net/2018/09/02/variable-cw-and-ssb-audio-filter/
Variable CW and SSB audio filter. Andy RW9RN has developed a wee circuit for insertion in the audio line to provide variable bandwidth control for CW and SSB. He has a video about it here. Reference.
Audio Filter for CW and SSB
http://www.wouxun.us/item.php?item_id=305
Weight 2.8 oz. This switched capacitor audio filter is a compact, useful accessory for the X1M or any other transceiver. It is a very useful device to sharpen the pass band for CW work, plus it may be set for SSB voice reception. The center frequency is adjustable from 400 to 1100 Hz and bandwidth is adjustable from 60 to 1800 Hz.
Tunable SSB/CW Audio Filter
http://www.radiomanual.info/schemi/ACC_audio/MFJ-751B_user.pdf
MFJ-751B Owner's Manual Tunable CW Audio Filter 1 INTRODUCTION Thank you for purchasing the MFJ-751B Tunable CW Audio Filter. The MFJ-751B consists of a four stage, switch selectable band pass CW filter, using selected components that will make “cleaning up” CW signals effortless and easy. Featuring razor sharp selectivity with extremely steep
Amazon.com: Audio DSP Digital Filter SSB CW Ham …
https://www.amazon.com/Audio-Digital-Filter-FT-817-Utility/dp/B08CMX6ZQS
It is an audio digital filter which is designed to eliminate and filter out the unwanted noises and interferences in a SSB or CW QSO by using the software algorithms called DSP. Unlike the single filter unit in the analog filters, the DSP filter work in a different way by a DSP chip powered by the software algorithms which makes it more ...
External Audio DSP Filter Module for SSB & CW, FT8x7 DSP ...
https://elekitsorparts.com/product/external-audio-dsp-filter-module-for-ssb-cw-ft8x7-dsp-filter
Get yourself a Funtronics FADS-02 external audio filter module. The QSOs will get much more straight-forward with this tiny external audio DSP module. The FADS-02 is an audio digital filter which is designed to eliminate and filter out the unwanted noises and interferences in a SSB or CW QSO by using the software algorithms called DSP.
Transceiver Filters, CW and SSB - Free Shipping on Most ...
https://www.dxengineering.com/search/part-type/transceiver-filters-cw-and-ssb
Find Transceiver Filters, CW and SSB and get Free Shipping on Most Orders Over $99 at DX Engineering! ... SOTAbeams LASERBEAM-817 Digital Audio Filter Modules. Sotabeams LASERBEAM817 - SOTAbeams LASERBEAM-817 Digital Audio Filter Modules ... Crystal Filter, SSB Narrow, 9.005 MHz/1.2 kHz, MAIN, for FTDX-101D, Each. Part Number: YSU-XF-128SN.
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
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.
Autek Research SSB / CW / AM audio filter, QF-1A ...
https://www.youtube.com/watch?v=2GyAG0WCzQQ
Project complete. I demonstrate its operation.Donations accepted: paypal.me/PayKlondikeMike
The Magical Audio Filter - N5DUX
http://www.n5dux.com/ham/files/pdf/The%20Magical%20Audio%20Filter.pdf
filter. Since one of the re- ceiver modes is CW, I wanted a notch filter with a variable frequency and a variable-frequency peaking circuit. The notch filter could also be used on SSB reception to reject hetero- dynes from AM stations. Some of the requirements that I wanted for the notch filter were: .a high Q (so the band-
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