Using the ne602

  • Initially I tried using the register values to change frequency, wanting a 400Hz FSK. But the spectrum showed significant "key clicks" or splashes of energy each time the frequency was updated by the Arduino. So to improve on this, the Arduino was programmed to simply provide a fixed frequency from the 4351.
dB gain to compensate for the inefficiency of this small antenna. Loop coil is not included, you need to make your own coil. The YouLoop is a low cost passive loop antenna for HF and VHF. Ne602 Preamp. FREE Shipping by Amazon. The E-field antenna has omnidirectional sensitivity.

In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation. Since no IF amplifier is used in the design, 20 dB of additional receiver gain is produced by the 2N2222 receiver RF amplifier, while automatic gain control (AGC) is produced by the peak DC swing of the LM386 output passed through a rectifier and filtered by a capacitor and fed to the gate of a BS170 enhancement mode FET ...

I built a CW receiver using NE602 for the 20m band. Unfortunately, I do not receive any CW or SSB signals, only some noise and sometimes broadcast stations. The schematic here shows the circuit that I built. What is wrong in the oscillator and input stages of ic that can not focused on 14 - 14.35 mhz (20m amateur band)
  • Mar 10, 2011 · [email protected] My first homebrew QRP TX was a simple solidstate CW transmitter using SL100, SK100 and BD139 giving about 5Watts on 40 Mt... 10-M DSB QRP TRANSMITTER WITH VFO NE602 NE602 The three schematics represent three building blocks for a 10-meter SSB transmitter.
  • Jan 29, 2018 · SA612 Model This is my original work, but some files might have gotten lost over the years. Installation instructions are included in the zip file. Rebuilt - This is a re-build done by Mike Wilson (KI6LIA) who graciously also supplied to me with this note: I added a line in your .asc file that has .subckt <filename> etc. …
  • Apr 26, 2015 · Frequency Synthesizer Using PLL The frequency of V out is locked (synchronized) to the input frequency: Classically, M and N are integers. ...

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    In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation. Since no IF amplifier is used in the design, 20 dB of additional receiver gain is produced by the 2N2222 receiver RF amplifier, while automatic gain control (AGC) is produced by the peak DC swing of the LM386 output passed through a rectifier and filtered by a capacitor and fed to the gate of a BS170 enhancement mode FET ...

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    So - how does it work ? Fairly well overall but it exhibits the same problem as every other NE602 type DC RX I've tried - the RF mixer overloads very easily which results in breakthru of strong AM and SW signals. An RF gain pot would help. The SA605 superhet is a much better performer but it has more parts.

    I settled on a hybrid design using a NE602 mixer/oscillator to down convert 3800 KHz to a 455 KHz IF. This is followed by a 455 KHz ceramic filter which couples into a TA7642 which provides IF gain, AGC, and envelope detection. The resulting base band audio is amplified by a TA7052 IC with BTL output and produces 1 watt of HiFi audio.

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    The design uses an SBL-L for the two mixers, an MAR-1 for the front end amplifier, two MC1350 IC's, an NE602 for the detector and three stages of MC1458 for the audio. The project is built on two boards. If you are looking for a good receiver to build, this is the one

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    or, by using a trigonometric identify, (15) The balanced modulator with the difference amplifier that implements equation (15) is shown in Figure 5. The corresponding voltages as seen on an oscilloscope for vout1, vout2, and vout are shown in Figure 6. Figure 5. Single balanced modulator with difference amplifier . Figure 6.

    Two 6 MHz range crystals enabled about 120 kHz of coverage. The bonus was that the VXO was tuned with a varactor and a very small pot. In the schematic below the SA612 (NE602) is both the oscillator and mixer stage. This all fit on a very small board. Try building a stable 19 MHz analog VFO and this VXO was built entirely "al fresco".

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    You can find vintage rocket radio's on eBay, but as a Christmas present I decided to make an updated model for her using the TA7642 IC. The TA7642 is a complete AM radio receiver on a chip. With a few extra components, you can have a fully functional TRF radio receiver in the palm of your hands.

    The PCB design and the circuit allows you to use digital tuning with DDS module. Connect AD9850 module output to pin#6 of NE612 IC1 through 10nF cap. If you connect DDS then following components are not used: C14, C17, C9, C10, C15, C16, C6, C8, C11, IC4, R4, R3, R1, L4, CD1. Adding the DDS require a microcontroller to set the frequency.

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    Receiving section for a typical straight LM386 NE602 plus variable receiver. Emitting portion utilizes the oscillation circuit NE602, and then to do the buffer amplifier 8050, 8050 also as the transmission key, the last stage is a class C amplifier D882, and then send the LPF after the antenna is connected. There sidetone launch. Kit Description:

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    NE602 RF Double Balanced Mixer IC SA602 Price £ 3.69 Same day dispatch on orders before 4pm Mon-Fri. ... Items should be returned using second class recorded post ...

    An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. MAX232E SLLS723C –APRIL 2006–REVISED AUGUST 2016 MAX232E Dual RS-232 Driver and Receiver With IEC61000-4-2 Protection 1 1 Features

Here, ic TA7358AP used as balanced modulator. This 9 pin SIL ic is originally used in the front end of FM radio, so widely available and can do almost all the work of hard to find IC NE602, NE612 etc. internal oscillator is used between pin 6 and pin 7. a xtal of 14318kc is put with 33pf so it gives me the frequency of 14313kc. output from pin 6 is followed by a emitter follower. from this ...
Typing NE602 into Google images will reveal many, perhaps even over 100 schematics using the NE602 as a Because the NE602 is internally biased, in the past I tried a number of different regen techniques with only moderate success.
Schaltungen mit dem Mischerbaustein NE602 (NE612, SA612, SA602) – Eine Übersicht zur Anregung. Der NE602 ist ein beliebter Mischerbaustein zur multiplikativen Mischung von Frequenzen, welcher neben einer Gilbertzelle außerdem einen leicht beschaltbaren Oszillator enthält.
By continuing to use a carbon microphone, I was able to get plenty of audio to drive one of the mixers in the NE602 as a balanced modulator, and used the other mixer for the receiver. Attempts to use the oscillator as a VFO were unsuccessful because of insufficient buffering within the 602, leading to severe fm-ing.