Mfj 784b mfjs tunable super dsp filter automatically eliminates heterodyne, reduces noise and interference simultaneously on ssb, am, cw, packet, amtor, pactor, rtty, sstv, wefax, fax, weak signal vhf, eme, satellite nearly any mode. Not carried mfj 752d signal enhancer ii dual tunable ssbcw 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. What id like to know is if theres a dsp audio filter that really makes any difference in making speech on am signals more intelligible through dsp reduction of noise. Mfj 781 multi mode dsp filter with cables manual 0 results. Apr 10, 2020 not quite sure what you mean by through a dsp filter, what i described was the 455 khz signal going to an sdr, the sdr being used as a panadapter, or yes as a dsp if you want. Timewave dsp59 dp59 dsp audio filter universal radio. You can tune each lowpass, highpass, notch, and bandpass filter including optimized ssb and cw filters. Deluxe tunable dsp filter automatically eliminates heterodyne, reduces noise and interference simultaneously on ssb, am, cw, packet, amtor, pactor, rtty, sstv, wefax, fax, weak signal vhf, eme, satellite nearly. Alpha delta vrc speaker with analog notch and variable cutoff for both high and low audio freq. They are just calling any kind of external digital processing a dsp.
On the internet, i found w9grs dsp3 but this is not produced any more. Instant software electronic breadboard program december 1982. Deluxe tunable dsp filter automatically eliminates heterodyne, reduces noise and interference simultaneously on ssb, am, cw, packet, amtor, pactor, rtty, sstv, wefax, fax, weak signal vhf, eme, satellite nearly any mode. Mfj mfj784b dsp audio filters, mfj784b ham radio outlet. Mfj mfj784b tunable dsp filter january 1996 479 kb mfj mfj8100 shortwave regenerative receiver kit. Buy dsp audio filter units sotabeams dsp filter online. Only mfj gives you 5 factory preset filters and 10 programmable preset filters that you can customize. Here, youll find links for mfj tunable dsp in addition, specific models mentioned in the audio dsp forum like,mfj and more are here for future reference.
Dsp technology has existed for many years but has always been very complicated and expensive. Please visit us today for all your ham radio needs. The mfj784b tunable dsp audio filter can simultaneously eliminate heterodynes, reduce noise and reduce interference in nearly any mode. You get mfjs tunable fir linear phase filters that minimize ringing, prevent data errors and have brick wall filter response with up to 57 db attenuation 75 hz away. Mfj1708sdr software defined radio transmit and receive switch. I guess the two units that seem to attract the most attention are the mfj 784b and the timewave dsp599zx. But a signal on 3840 khz was still a botherno matter what i did. Back in the day, when some of these dsp filters started surfacing in a. I was severely disappointed with the mfj 784b dsp noise reduction filter. Is any one using deluxe tunable dsp filter mfj 784b. Mfjs tunable super dsp filter automatically eliminates heterodynes, and reduces noise and interference simultaneously on ssb, am, cw, packet, amtor, pactor, rtty, sstv, wefax, fax, weak signal vhf, eme, satellite nearly any mode. It has cascaded filters 500500 and has the ability of a 500270 hz. Mfj 784b afstembaar dsp filter extern classic international. Mfj mfj784b deluxe tunable dsp audio filter high pass low pass bandpass notch noise reduction.
I also use the 784b with an ft450d which has if dsp and i will state without question that it can be of great benefit. Apr 21, 2020 up for auction ebay seller name beeky1 call sign kg4rsf. May 14, 2005 i am curious to get some opinions on dsp audio filters and their usefulness with regard to noise reduction for shortwave broadcast listening in the am mode. I tried all sorts of settings with no joy it was awkward to use and was ineffective overall. Is any one using deluxe tunable dsp filter mfj784b. You get mfj s tunable fir linear phase filters that minimize ringing, prevent data errors and have brick wall filter response with up to 57 db attenuation 75 hz away.
Repaired a mfj784 dsp filters purchased on qth from another ham. The basic thing to remember is to select your filter setting and use the tunable filter knobs. Ham radio and amateur radio online equipment sales. Jan 11, 2009 i have huge qrn problem at my home and wanted to buy some item that can cancel these noise. Nov 06, 2015 repaired a mfj 784 dsp filters purchased on qth from another ham. You get five tunable dsp filters, plus ten programmable filters. T mfj signal enhancer ii dual tunable ssbcw filter mfj752c. Digitalmode enthusiastsespecially those lacking if filters tailored for such modesmight find the mfj784b a real plus to combat qrm and high noise levels. Mfj 784 dsp filter operating and working again youtube. The mfj752d all mode dual tunable filter has variable bandwidth 40 hz to almost flat. Yaesu sp8 loudspeaker with bhi nedsp1062kbd dsp noise filter. A great place to buy computers, computer parts, electronics, software, accessories, and dvds online. Audio filters the mfj 781 is an external dsp filter for any tnc or multimode data controller.
On the internet, i found w9grs dsp 3 but this is not produced any more. Of course, if you have a rig that has no if dsp you have two choices. You ended up loaning the texas instrument dsp board to dave along with the books and your custom software after dave had the filter for a short while,he suggested i use it as he was going to be away on an extended vacation. Mfj784b deluxe tunable dsp filter available radioworld. The dsp59 filters noise and reduces interference to improve radio reception. Tunable dsp audio filter mfjs tunable super dsp filter automatically eliminates heterodyne, reduces noise and interference simultaneously on ssb, am, cw, packet, amtor, pactor, rtty, sstv, wefax, fax, weak signal vhf, eme, satellite nearly any mode. Mfj 781 gives you an arsenal of 100 incredibly sharp noring linear phase fir filters. I sold it, keeping my trusty, expensive timewave dsp 599zx which does a better job and is easier to use. I was severely disappointed with the mfj784b dsp noise reduction filter. You get input for two rigs switchselectable a noise limiter, and more. The setting you may need may be very narrow and you could sweep right past it. Introduction to dsp the vec884 tunable dsp filter uses stateoftheart digital signal processing dsp technology. You can vary the bandwidth to eliminate interference.
Shop from the worlds largest selection and best deals for mfj radio communication equipment. Nc mfj 752d signal enhancer ii dual tunable ssbcw audio. Wave arts trackplug dsp aax 10band eq filters compressor software edelivery. Both units use 9 18 vdc or 110 vac with the optional mfj12d. The mfj784b tunable dsp filter theres monitoring times. Mfj antenna analyzer filters mfj731 free shipping on. Front panel rear panel indicators the mfj 784b tunable dsp audio filter can simultaneously eliminate heterodynes, reduce noise and reduce interference in nearly any mode. If you dont like our preset filters, you can program your own an mfj exclusive. Mfj 784b description hide mfj s tunable super dsp filter automatically eliminates heterodynes, and reduces noise and interference simultaneously on ssb, am, cw, packet, amtor, pactor, rtty, sstv, wefax, fax, weak signal vhf, eme, satellite nearly any mode.
Digital signal processing greatly improves signal clarity by reducing or eliminating noise qrn and interference qrm. To get the most out of this unit, requires that you read the instruction manual which can be a bit demanding. With great prices, fast shipping, and toprated customer service newegg shopping. Mfj784b tunable dsp filter helps separate signals on crowded bands courtesy mfj enterprises radio computer interfaces to receive the digital modes mentioned youll need another accessory. This filter plugs between radio and tnc rca phono jacks. Digital signal audio signal filter units a great addition for your ft817 if you dont fancy installing our internal dsp filter this is a readybuilt dsp audio filter unit using one of our popular dsp modules. Getting started in sw listening part iii monitoring times. Mfj antenna analyzer filters are tunable rf filters that allow for accurate swr and impedance measurements between 1.
Amateur radio products sold here,we update our stocks to keep in touch with modern improvements in dsp design. Copy signals buried in noise and qrm signals you cant even hear. I have huge qrn problem at my home and wanted to buy some item that can cancel these noise. I am curious to get some opinions on dsp audio filters and their usefulness with regard to noise reduction for shortwave broadcast listening in the am mode.
The ideal unit to give your older receivers a new lease of life with greatly improved filtering. I use my mfj set at 30hz the minimum filter it can provide in cw mode. Connect the positive power supply lead to the center conductor of. Mfjs tunable super dsp filter automatically eliminates heterodynes, and reduces noise and interference simultaneously on ssb, am, cw, packet, amtor. Mfj s tunable super dsp filter automatically eliminates heterodyne, reduces noise and interference simultaneously on ssb, am, cw, packet, amtor, pactor, rtty, sstv, wefax, fax, weak signal vhf, eme, satellite nearly any mode. In the example you point out they say software radio dsp demodulator. Introduction to dsp the mfj784 tunable dsp filter uses stateoftheart digital signal processing dsp technology. But, many digital modes already utilize their own software audio filtering. Amateur radio products sold here,we update our stocks to keep in. The timewave dsp59 is an audio noise filter developed and optimized for the radio amateur market. I have an option to buy an mfj 748b tunable dsp filtersounds impressive to me. Mfj signal enhancer ii dual tunable ssbcw filter mfj752c. Hamcity has more than 30 years of experience in the amateur radio equipment business.
Mfj784b instruction manual tunable filters controls the tunable filters knobs, left and right, adjust the center frequency also called the tone or pitch and the bandwidth also called the selectivity or the lower and upper cutoff frequencies of the 5 tunable filters selected by the filters switch. With great prices, fast shipping, and toprated customer service newegg shopping upgraded. Link synopsis scopefir fir filter design software for windows tfilter a web application for designing linearphase fir filters scopeiir iir filter design tool for windows digital signal processing tutorial java applets for digital filter design. Filter, cwssb audio filter, 2notch, audio amp the optimizer switch selectable ssbcwfilter offers razor sharp filtering with switchselectable bandwidths 80, 110, 50, 180hz centered on 750 hz, steep skirted ssb filtering. Code3 gold uses the very best of software dsp filtering and. I guess the two units that seem to attract the most attention are the mfj 784b and the timewave dsp 599zx. Buy mfj784b dsp audio filter, tunable, deluxe with fast shipping and toprated customer service. Fixedmount cb radios free delivery possible on eligible purchases. This is an estate find and was taken from the sks shack. The mfj784b tunable dsp filter is a highly selective audio filter suitable for. Repaired a mfj 784 dsp filters purchased on qth from another ham.
I\m using it with a kenwood ts8505 which is a cw op\s dream as far as i am concerned. So on daves last visit with me in september,the filter arrived at ve7bqh. Save center frequencybandwidth, lowpasshighpass cutoffs, automanual notch. Mfj understands this and the 784b has no fewer than five knobs. The filters have virtually no effect on measurements and work with all swr analyzers. I usually only work with one 500 hz filter in line. Here, youll find links for mfj tunable dsp in addition, specific models mentioned in the audio dsp forum like, mfj and more are here for future reference. Mfj784b tunable dsp filter m 2 eb432 eggbeater antenna. Mfj784b tunable dsp audio filter main trading company. I shopped around a good deal before buying the mfj. John wilson on filters in receivers mfj784b digital signal. Get the latest deals from mfj enterprises all with faster shipping and excellent customer services.
10 836 780 469 1424 1112 785 1307 91 759 1396 820 95 772 470 1649 1144 344 1580 575 1369 941 98 505 782 1188 922 1009 1378 141 1202 1432 299 1248 1469 1035 1419 1429 21 722 1277 1262 288 436 1043 278 1311 506 1336