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MPF102 | SCFXGuide
https://scfxguide.wordpress.com/category/stompboxes/preamp/mpf102/
LM386 & MPF102 – Ruby Mini Amp. As stated in the preamp description, a new (old) wave of small, less that 1W, amps are available on the internet. A couple of them are unavoidable such as the Ruby amp from runoffgroove.com. A 9V batterie powers a LM386 IC and a MPF102. This schematic consists of a Gain knob and a Volume knob,which you can hear ...
FET Preamplifier, Part 1
http://www.hawestv.com/amp_projects/fet_preamp/fetpreamp1.htm
When you build a circuit, you go to a lot of work. Make the effort pay off! My page offers a new preamp design, starting with the MPF102's specs. Now you have the right design for an MPF102 JFET preamplifier. Build carefully. You'll wind up with a satisfying project that you'll appreciate for years. Oncoming Scarcity of MPF102 & J201
Substitute for MPF102 JFET
http://www.hawestv.com/amp_projects/fet_preamp/fet-mpf102-sub1.htm
For the high price, this part doesn't deliver any added value, at least not for our audio project. Source Resistor. The NTE456 isn't a drop-in replacement. It might require a larger source resistor than the other devices use. In my original MPF102 circuit, I use a 560-ohm source resistor.
Mpf102 Circuit - mpf102 fet preamplifier faqs part 5 ...
http://media.wcyb.com/mpf102-circuit.html
Mpf102 Circuit - 9 images - electrosmash noisy cricket, the life of kenneth high impedance ruby audio amplifier,
MPF102 JFET Pinout, Features, Equivalents & Datasheet
https://components101.com/transistors/mpf102-jfet-pinout-datasheet-equivalents
Pre-Amp applications; Audio noise cancelation . 2D model of the component. If you are designing a PCB or Perf board with this component then the following picture from the MPF102 Datasheet will be useful to know its package type and dimensions.
MPF102 Pinout, Equivalent, Applications, Explanation ...
https://www.componentsinfo.com/mpf102-pinout-equivalent/
MPF102 Transistor Explained / Description: MPF102 is a very famous JFET transistor used in many commercial devices as well as educational and hobby projects. It is mainly built for the amplification in VHF region of frequencies. But other than that it can also be used in verity of other audio amplification related applications.
ON Semiconductor Is Now
https://www.onsemi.com/pdf/datasheet/mpf102-d.pdf
MPF102/D MPF102 Preferred Devices JFET VHF Amplifier N−Channel − Depletion Features • Pb−Free Package is Available* MAXIMUM RATINGS Rating Symbol Value Unit Drain−Source Voltage VDS 25 Vdc Drain−Gate Voltage VDG 25 Vdc Gate−Source Voltage VGS −25 Vdc Gate Current IG 10 mAdc Total Device Dissipation @ TA = 25°C Derate above 25 ...
MPF102? - The RadioBoard Forums
http://theradioboard.com/rb/viewtopic.php?t=276
after a while the radio went dead, hmm, ok only active components were that fet A 2N2222A transistor and a LM386 amp chip, I started checking voltages, there was a debuging section of the PDF manual, on second or third touch of the probe I found that no signal was comming from the preamp, hmm, ok my only MPF102 was likely dead:-
FM, AM/MW and SW Antenna Amplifier Using MPF102 …
https://circuits-diy.com/fm-am-mw-and-sw-antenna-amplifier-using-mpf102-transistor/
This is the circuit diagram of FM, AM/MW and SW antenna amplifier circuit or we can likewise say it antenna preamplifier circuit which can be utilized to expand the faint signals of FM, AM/MW and SW groups. The circuit is straightforward and simple to assemble utilizing just a single transistor MPF102 and a couple of different parts.
Options to replace MPF102 JFET in piezo preamp - will a ...
https://www.reddit.com/r/AskElectronics/comments/54a20r/options_to_replace_mpf102_jfet_in_piezo_preamp/
The preamp provides gain of approximately -3 (it's an inverting amplifier so the gain is negative). They selected a JFET because it has enormously high input impedance; much much higher than the 3.3 million ohm input resistor. You can get the same effect from any other preamp circuit which has a gain of 3 and an input impedance of 3.3 million ohms.
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