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VEC-841K, KIT, TUNABLE CW AUDIO FILTER | MFJ …
https://mfjenterprises.com/products/vec-841k
Notch is a deep 50 dB. Tunable peak filter improves CW, SSB, AM, SSTV, and RTTY signals. This tunable SSB/CW Audio filter gives you constant output when bandwidth is varied, linear frequency control and tighter, smoother notch. Works with any receiver or transceiver. Plugs into phone jack. 1 watt amplifier for external speaker. Speaker and ...
Tunable SSB/CW Audio Filter - radiomanual.info
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
MFJ-784B, TUNABLE DSP AUDIO FILTER | MFJ …
https://mfjenterprises.com/products/mfj-784b
Tunable bandpass filters Narrow band signals like CW and RTTY jump out of QRM when you switch in MFJs exclusive tunable FIR bandpass filters. You can tune the center frequency from 300 to 3400 Hz, and vary the bandwidth from 30 Hz to 2100 Hz -- from super-tight CW filters to wide razor-sharp Data filters.
VEC-841K VECTRONICS VEC841K TUNABLE AUDIO FILTER KIT
https://store2.rlham.com/shop/catalog/product_info.php?cPath=8030&products_id=33250
filters for extra steep skirts. Tune the frequency from 300 to 3000 Hz and vary the bandwidth from 80 Hz to nearly flat. Notch is a deep 50 dB. Tunable peak filter improves CW, SSB, AM, SSTV, and RTTY signals. This tunable SSB/CW Audio filter gives you constant output when bandwidth is varied, linear frequency control and tighter, smoother notch.
MFJ MFJ-752D NC MFJ 752D Signal Enhancer II Dual Tunable ...
https://www.dxengineering.com/parts/mfj-752d
MFJ 752D Signal Enhancer II Dual Tunable SSB/CW Audio Filters have two tunable audio filtering systems in one unit, designed to enhance clarity and remove interfering signals from both voice (SSB or AM) and code (CW or RTTY) signals. This is accomplished by a primary filter, which is a 2-section, 4-pole variable filter (with peak, notch, low ...
Audio Filters - Universal Radio
https://www.universal-radio.com/catftp/H028_028.pdf
The MFJ-722B is a SSB/CW tunable 70dB notch audio filter. It has an eight pole active IC filter 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. Requires 12 VDC. MFJ-1312D suggested. MFJ-722B Order #0000 Disc. MFJ-1312D Order #2433 $19.95 MFJ-722B ...
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