Stereo encoder| RDS encoder and 15W | 50W FM transmitter Packageġ5 Watt and 50 Watt Packages come with exciter, stereo encoder and sometimes also RDS and IO board. The new MPX multiplexer circuit is 114x oversampled and gives better stereo separation than. The amazing sonic purity and clarity are sure to impress you.
#Skema encoder stereo fm series
SE8000 series stereo encoders feature a number of big enhancements and raise the bar considerably for stereo separation and audio excellence. SE8000 stereo encoder with record-breaking 114x oversampling Stereo encoder series with record-breaking 114x oversampling
#Skema encoder stereo fm professional
Professional DSP stereo encoder & processor SE 5000 SE8000 DSP+ with built-in compressor, limiter, balanced inputs, sharp 19KHz stereo carrier notch filter, pre-emphasis, LC input filters and ESD protected inputs which all help to bring out the best soundĭSP stereo FM encoder & processor SE 5000 + Moving heads and washlights stage | podiumĭJ CD |MP3 | Flash Studio en Stage playersįM transmitter package RDS and DSP 50 Watt NanoĬyberMax-8000+ DSP stereo and RDS encoderĬyberMax-8000+ DSP stereo and RDS encoder with LCD display - new RDS featuresĬyberMax8000+ DSP/RDS stereo encoder offers excellent stereo separation with 114x oversampling, RDS and DSPĬyberMax-8000+ DSP stereo processor with LCD display excellent stereo separation with 114x oversampling IMG-Stageline Radio Studio Broadcast Mixers Consoles Studio Mixers | Broadcast Mixers | Consolesĭ&R Broadcast Radio Studio Mixers Consoles Studio Stage Studio | Stage | Radio studio | equipment Semirigid 25-ohm and other special coaxial cable High Gain ColinearAluminium ¾ Wave antennas but some filtering needs to be added.RF FM output boards and swr pickup boards modifying the vfo to a crystal controlled version would fix the stereo issue. Ive seen very similar circuits using the same switching technique with a 4066. oh and the separation? its fair to poor depending again on the vfo setting. the 19k output has a reasonable sinewave. this doesnt help trying to keep the stereo locked either. on the scope i found the osc to be a touch jittery.
I also tried modding the pilot level using a resistor network. with no audio the carrier sounds like its being overdriven.ĭriving with audio and the sidebands sound bad. this needs some fitering to stop the harmonics.
i used a wein bridge osc.īack to this encoder. that osc.!! my one used ALL bc548c,s no chips. [ i built one myself a few years ago using my own design. it only has to be a bit off and the output becomes mono. the separation really depends on the oscillator. anyhow i removed the short and gave it a good check over and wired it up again. i found a vey tiny piece of copper track that was making contact. recently i got the pcb out again and had a good check. i had problems with high levels of whistling. T1 = BC547B, BC549C Stereo encoder circuit schematic I have worked with this stereo encoder in my youth and it’s pretty good because has a 70% stereo separation that is pretty good.Ĭ3 = C4 = C5 = C9 = C10 = C12 = 100nF ceramic If you want the best from this mpx stereo encoder use metallic resistors, ceramic capacitor, shielded audio cables for input and MPX output and a good stabilized, filtered 5V power supply. You can use a better T1 like BC549C if you want a higher sound amplification. If your audio source has dc voltage on audio output connect 2 x 0.47uF capacitor on the stereo encoder inputs.
Use metallic resistors and 100nF ceramic capacitor for low noise stereo signal. From R10 adjust the pilot tone signal and from R7 adjust the sound level. To adjust the frequency rotate R13 (multiturn) untill on IC2 pin 10 you measure 19kHz or the stereo led lights up on your stereo receiver. On IC2 pin 10 you can find 19kHz pilot tone frequency. On IC1 2 and 3 pins is the audio output which is amplified by T1 (current amplification). This simple stereo encoder circuit schematic is build with 2 IC MMC4066E and MMC4047 and one transistor BC547B.
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