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MFJ-722 Audio Filter - Universal Radio
https://www.universal-radio.com/catalog/filters/2082.html
MFJ-722 Audio Filter. The MFJ-722 is an SSB/CW tunable 70dB notch filter. It has eight pole active IC filtering and uses cascaded low-Q stages. In the CW mode, three bandwidths are featured: 80, 110 and 180 Hz. The center frequency is 450 Hz up to 15 dB. 5.5 x 2.5 x 5 inches. This item requires 9-15 VDC @300 mA.
MFJ-722B Audio Filter - Universal Radio
https://www.universal-radio.com/catalog/filters/5801.html
MFJ-722: Audio Filters The MFJ-722B is an SSB/CW tunable 70dB notch filter. It has an eight pole active IC filtering and uses cascaded low-Q stages. In the CW mode, four bandwidths are featured: 80, 110, 150 and 180 Hz. The center frequency is 450 Hz up to 15 dB. This item requires 9-15 VDC @300 mA. The optional MFJ-1312D power supply below is ...
MFJ-722 INSTRUCTIONS
https://www.qsl.net/yo4hfu/Files/TCVR_HF_DDS/MFJ-722.pdf
MFJ-722 INSTRUCTIONS INTRODUCTION I The MFJ-722 OPTIMIZER consists of a tunable notch filter combined with a switch selectable highpass/lowpass filter (SSB) and bandpass (CW) filter. This filtering capability allows you to remove interference from both SSB and CW signals thereby optimizing the desired signal. INSTALLATION 1.
MFJ MFJ-722B DSP Audio Filters, MFJ722B
https://www.hamradio.com/detail.cfm?pid=H0-001241
Woodbridge, VA. MFJ-722B Description Hide. The "Optimizer" switch-selectable SSB/CW filter offers razor sharp filtering with selectable bandwidths (80, 110, 50, 180 Hz centered on 750 Hz), plus steep skirted SSB filtering. You also get a 300-3000 Hz …
MFJ-722B FILTER, CW/SSB AUDIO FILTER, 2/NOTCH , AUDIO AMP ...
https://www.mtcradio.com/mfj-722b-filter-cw-ssb-audio-filter-2-notch-audio-amp/
Product Description. MFJ-722B FILTER, CW/SSB AUDIO FILTER, 2/NOTCH , AUDIO AMP The “Optimizer” switch selectable SSB/CWfilter offers razor sharp filtering with switch-selectable bandwidths (80, 110, 50, 180Hz centered on 750 Hz), steep skirted SSB filtering. 300-3000 Hz tunable 70 dB notch filter. Plug into phone jack.
eHam.net
https://www.eham.net/reviews/view-product?id=4092
On the other hand, the MFJ filter does not provide the razor-sharp selectivity than can be obtained with state-of-the-art DSP audio filters. A comparison of frequency response curves for the MFJ-722 (from the owner's manual) and the SGC audio DSP filter (QST, January 2004, pp. 70-71) indicates that, even in CW wide mode, the SGC filter is ...
eHam.net
https://www.eham.net/reviews/detail/4870
The MFJ-721 is an older unit that was replaced by the updated MFJ-722. The 722 adds a notch filter to the existing filter capabilities of the MFJ-721. MFJ also moved the headphone jack to the BACK of the 722, which means you have to handle the unit every time you use.
MFJ-722B SSB & CW Audio Filter available - Radioworld UK
https://www.radioworld.co.uk/mfj-722b_ssb_cw_audio_filter
MFJ-784B, TUNABLE DSP AUDIO FILTER | MFJ …
https://mfjenterprises.com/products/mfj-784b
Only MFJ gives you 5 tunable DSP filters. You can tune each lowpass, highpass, notch, and bandpass filter including optimized SSB and CW filters. You can vary the bandwidth to eliminate interference. Only MFJ gives you 5 factory pre-set filters and 10 programmable pre-set filters that you can customize. Instantly remove QRM with the turn of a ...
MFJ-726, PLUG-IN AUDIO FILTER FOR MFJ-90XX CW …
https://mfjenterprises.com/products/mfj-726
Recommended for the MFJ-726, PLUG-IN AUDIO FILTER FOR MFJ-90XX CW QRP XCEIVER.
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