The ne602 contains an lo and dou blebalanced mixer in an 8pin dip, as shown in fig. The converter can be set up to cover either 800 to 900 mhz or by readjustment 900 to mhz. Rtlsdr blog rtl sdr v3 r820t2 rtl2832u 1ppm tcxo sma rtlsdr software receiver. Enter the value to convert in the from edit box and the to value is automatically calculated.
The sa602ne602 module various views of construction of the up converter described in the jan 20 qst for use with rtl type dongles. And finally, a lm386 is the audio amplifier capable of driving a speaker or walkman type headphones. Simply click on the category on the left and select the units from the dropdown lists in the from and to boxes. This ic finds his applications in layer capacity communication systems, cellular radio applications, rf data left, vhftransceivers, broadband lans ed. In my application upconversion makes a preselector unnecessary unless the 602 is indeed susceptible to input overload. By using a low cost mixer ic chip called the ne612 and some passive components tomasz was able to build a low cost upconverter for his rtlsdr. Jan 24, 2017 the ne602 has a built in oscillator that can use l and c components and or a crystal or ceramic equivalent device that connect directly to pins 6 and 7 to make up the local oscillator.
A bfr92a lvds to ttl converter to drive 74ac74 chip from si570 output. The exact lo frequency, or as near as you can get is placed in the lo box. Ne602 direct conversion receiver circuit under rf receiver. Since the receiver is actually only serving as a down converter, theoretically it can be replaced by a mixer and a local oscillator. This page is a guide aimed at helping anyone set up a cheap radio scanner based on the rtlsdr software defined radio as fast as possible on a windows system.
A subreddit for the lowcost software defined radio sdr community. Here is a list of best free unit converter software for windows. The upconverter circuit was also designed to be able to provide inline power. Vc ultimate operation steps are easy for both, with clean install and latest updates. You may have used that method in your initial attempt with your cb receive setup. Upconverter ne602 for rtl2832,funcube usb dongle youtube. In addition, we utilized the ne602s internal oscillator in a varactortuned colpitts vfo circuit. How to setup ham it up upconverter by nooelec with sdr. Remember, absolute accuracy will not be obtained, if it ever is then the dongle will soon drift a little. Apr 25, 2014 a new super budget hf upconverter has appeared over on. There are many free software applications available for decoding digital signals.
I built a converter using the ne602 and a crystal oscillator provided by ke1gf that is much more stable. Lets take a look at them one at a time before we see how they work together in the simple superhet. Acceleration, angle, area, capacitance, charge, conductance, currency, density, distance, energy, etc. If you have old am radio, you can use this circuit to change to short wave radio, and tune the short wave frequency and start listening short wave around the world. Down converter designed by steve ford at arrl to convert a 445khz if signal to 12khz for computer sound card. The 0 to 500 khz range is translated into the frequency range from 10 to 10. This project is a simple sa602 like ne602 based rf upconverter, that mixes the vlf and lf bands 0 to 500khz with a 10 mhz local oscillator, making it possible to receive 0500khz with a standard hf communications receiver or transceiver.
Unit conversion is necessary because it helps with carrying out formula based calculations. Here you can select and change units of various measurement parameters. Then, say there is a very strong signal just outside the reception bandwidth, say a strong. Mar 08, 2015 upconverters are often used to extend the rtlsdr dongles minimum receivable range down to the hf, mf and lf bands. It is unfair to judge the capabilities of directconversion receivers by listening only to designs optimized for simplicity and low cost. A while back i decided i wanted to receive the hf bands with the rtlsdr and decode the digital modes or just listen to the guys ragchew. Radio and this means that much of the work is done in software, both to reduce. The budget hf upconverter uses a 50 mhz oscillator and an. Modern qrp rigs and the development of the qcx cw transceiver kit. The datasheet of the ne602 does not specify local oscillator. Wisecalc offers a free unit converter along with various other tools.
Upconverters are often used to extend the rtlsdr dongles minimum receivable range down to the hf, mf and lf bands. This circuit appears to have no preselection or filtering circuits. Sep 14, 2012 the rtlsdr is designed for higher frequency operation, so if youd like your rtlsdr to be able to access many of the amateur, short, medium and longwave bands youre going to need an upconverter. Figure 9 shows the basic configuration for providing the lo signal at output pins 4 and 5. In my application up conversion makes a preselector unnecessary unless the 602 is indeed susceptible to input overload. Schaltungen mit dem ne602 ne612, sa612, sa602 eine ubersicht. Jan 06, 2018 here i go through configuring sdr sharp and cubic sdr for use with the ham it up upconverter by nooelec. The guaranteed parameters of the sa602a make this device wellsuited for cellular radio applications. Ic in a ordinary 8pin dualinline can be bought implementation dip or 8pin so surfacemount miniature.
I bought pixillion image converter for windows from nch softwares website before i knew it was available on amazon. I am designing a receiver at present that will use the sa602 as a first, upconversion mixer, and a second one to bring the if down to about 300khz. Naturally, to enhance vfo stability, we used npocog. Unfortunately, the ne602 crumbles with a 40meter dipole connected to the in put, and the ne602lm386 pair has notice able distortion when driving a small speaker with multiple cw signals.
John was the first to get the whole lashup to work. A new super budget hf upconverter has appeared over on. Hi dear om shirley, i have built, has a high sensitivity, in place of the 2n2222 put a good fet, the transistors are noisy and have a low base impedance, the impedance of the fet has a high base and less noisy absorb less rf from the tuned circuit, improving the q. The sa602an which is a pinforpin equivalent to the ne602n originally produced by signetics is an eightlead dual inline package dip intended for lowpower, high performance communications systems. Mischer fur einen konverter mit einem externen oszillator. This book is for people who are interested in radio and electronics and those who enjoy building and.
And because there was already a power supply needed for the crystal oscillator, i choose to use the mixer ic sa602. On6mus 50mhz converter project for radio amateurs and. Connect the rtl receiver and the upconverter to the antenna with a shielded. To invent, you need a good imagination and a pile of junk thomas alva edison 18471931 rf basics and theory. You can homebrew a converter and use the software below to listen to drm. It is only suitable for use on the r820t and is incompatible with the e4000. You will have to experiment with this if you dont have a frequency counter. Click on the units tab to access the unit conversion options.
The kit is used to demonstrate the principle of direct conversion receiver design this is a design from the 1920s. Here i go through configuring sdr sharp and cubic sdr for use with the ham it up upconverter by nooelec. Easysdrhf upconverter sa602 mixer pcb sprint layout. All amateur radiorelated projects, tips, tricks, and tools. In the box immediately below that you need to set the lo freq of your upconverter. How to setup ham it up upconverter by nooelec with sdr sharp. Ne602 upconverter for rtl2832 by wa7jhz qrz forums.
I compared the frequency displayed against what my ft890 said the freq was of a particular signal and calculated the difference, then entered the final lo freq in. Building a frequency converter is easier now than its ever been because of a new iic, the signetics ne602. Receiving hf with rtl2832 and a transverter 8 years ago by admin 5 this is a simple demonstration showing how one can receive hf using the ultracheap rtl2832ubased dvbt usb dongle and a transverter to move the hf signals into the range that the tuner in the dongle can receive. Unfortunately, the ne602 crumbles with a 40meter dipole connected to the in put, and the ne602 lm386 pair has notice able distortion when driving a small speaker with multiple cw signals. This basic frequency translatorconverter circuit is based on the block diagram of fig. In traditional hardware radios, the mathematical operations required to decode and process radio signals are performed using analogue circuitry. The heart of the converter has been built around philips sa602 ne602, ne612, sa612, a twice balanced mixer oscillator.
Find ne602 converter related suppliers, manufacturers, products and specifications on globalspec a trusted source of ne602 converter information. He discovered that the converter drifted and designed a crystal oscillator to eliminate the drift. There is newer pic programmer software for win9598xp at winpic that will program the complete 2k rom 16f628 using taits existing hardware. Choose a measurement parameter, then on the panel at. I built a 100mhz upconverterne602 with the help of george smarts design and ne602 datasheet but i cant receive hf bands at all. Thanks so much for the write up and opportunity to chimein. The converter is very stable, low noise, sensitive and low on power consumption. Its a remarkable little 8pin chip that contains an oscillator and a gilbert cell mixer. We use a modified hardware driver that allows the stick is in a sort of test mode, through which the incoming antenna signals after a tuner and a decoder in an i and a q signal are continuously sent to the usb port. The budget hf upconverter uses a 50 mhz oscillator and an ne602an double balanced mixer and oscillator integrated circuit. Most of them cover from around 50mhz up to 2200mhz 2. Up converter ne602, pentru sdr dongle rtl2832 funcube.
The best free programs and websites for converting units. The popular argo spectrogram software uses a lower sampling rate, and will accept incoming signals up to about 2. In the history of radio, the obvious short comings of this design was overcome by superheterodyne. Unit converter is a free online tool for converting. The best free programs and websites for converting units and. The file contains dos software and programmer schematic that will work with pic16c84, pic16f84 or the newer pic16f628, but will not program the full 2k rom. To cover the 180 to 190 khz range, with a tunable if of 10 to 20 khz, the local oscillator frequency needs to be either 170 or 200 khz. Cause i wanted receiver coverage up to 30 mhz, i redesigned the circuit changing several components. I built this kit, performed the alignment, and hooked it up to a 20 ft piece of wire. Thanks so much for the writeup and opportunity to chimein. An mk484 zn414, td7642 trf receiver circuit is the if amplifier and detector. Digital dutch is a free online unit converter that is easy to use. The ne602 is normally used as a receiver frontend or as a frequency converter.
They are available for purchase commercially, or you can build your own, which is what tomasz of has done. Aug 05, 2012 i made an upconverter with ne602 for rtl2832 here you see reception in 20 meters band,first cw, then bpsk31 and ssb and little sstv i setup on hdsdr in options, extio lo frequency as sdr. This converter enables reception of 800 to mhz on any scanner covering the 400 to 500mhz range. The ne602 has a built in oscillator that can use l and c components and or a crystal or ceramic equivalent device that connect directly to pins 6 and 7 to make up the local oscillator. It is an extremely valuable product for me because some of the images you download via the internet and get from folders on your computer are not always in the format you require. Removed paulino satos ta7358apbased converter as he has removed all access to the dropbox link containing his plans. As you have probably heard by now, the rtlsdr is a cheap dvb tv usb stick that can be used as a software defined receiver sdr. If you are a minimalist and like to mess with small electronics projects then you should meet the sa602 chip. On6mus drm converter interface modification 455khz mf.
I compared the frequency displayed against what my ft890 said the freq was of a particular signal and. All i needed was a downconverter, so i borrowed most of the circuit from the lf upconverter described elsewhere on my web page in the solderless homebrew projects article. By using a low cost mixer ic chip called the ne612 and some passive components tomasz was able to build a low cost upconverter for his rtl. The heart of the converter has been built around philips sa602 ne602, a double balanced mixer oscillator. Sensitivity is very high because of the gasfet front end. Weve had experience with this before, and have found the ne602 oscillator to be remarkably resilient, forgiving, and stable. Rtlsdr rtl2832u and software defined radio news and projects. The intention is to use ham software, which exists for both windows and linux and android. The thirdorder intercept ip3 of dbm is much less spectacular, to say the least. His upconverter uses a 100 mhz crystal oscillator that brings frequencies. It has low noise, around 17 or 18db of gain and will operate up to 200mhz and above.
In the box immediately below that you need to set the lo freq of your up converter. There are quite a few choices for an hf converter upconverter are now available to shift signals into the tuners frequency range. An sa602 ne602 is the local oscillator and double balanced mixer that produces the if output. It is intended for highperformance, lowpower communication systems. Up converter for rtl2832 funcube with 100mhz cristal quartz for. Check out his article, all the software is available. Roundup of rtlsdr upconverter choices retrovoltage. These freeware help you with unit conversion of various unit types or measurement categories. Within certain limits you can change the output bandwidth frequency to suit your needs. Sdr upconverter sa602 the sa602ne602 module various v.
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