However, they usually cannot handle high drain currents in other words, they are not considered power switching devices. Mpf102 datasheet, cross reference, circuit and application notes in pdf format. Jfet vhf amplifier, mpf102 datasheet, mpf102 circuit, mpf102 data sheet. These were made by etching depressions into an ntype germanium base from both sides with jets of indiumiii sulfate until it was a few tenthousandths of an inch thick. Mpf102 datasheet, mpf102 pdf, mpf102 data sheet, datasheet, data sheet, pdf home all manufacturers by category part name, description or manufacturer contain.
Is there anything that say radioshack would have in stock. The transistor is a semiconductor device that can amplify signals and switch power. Quickbuying 10pcs mpf102 jfet amp nch rf ss to92 fsc new 5. Peak current is ususally about twice the average current. But if you didnt found mpf 102 transistor then you can use nte 451 or 2n4406 as substitutes. Jfet amplifiers worksheet discrete semiconductor devices. Last months opening episode explained among other things the basic operating principles of jfets. I can recall the days before the mpf102 was so widely known and we used the motorola hep801 and hep802 series of transistors.
Mpf111 datasheet description low power field effect. For l1 use 470uh coil for am and for shortwave use 20uh coil. And, since i like guilding the lily my way, im adding a wallwart jack in the back where the cord entered the case, along with a lm78l05 regulator. This simple little circuit can be used for am, fm, and shortwavesw. You can significantly boost the gain by adding a source resistor bypass capacitor. Two of the oldest and best known nchannel jfets are the 2n3819 and the mpf102, which are usually housed in to92 plastic packages with the connections shown in figure 1. Radio shack once sold four nte equivalents for the mpf102.
Recent listings manufacturer directory get instant. Ic cross reference cross reference ci stk cross reference ci tda cross reference ci sharp cross reference hitachi audio ic cross reference and circuit applications smd cross reference and equivalent we make every effort to ensure that the material on this site is accurate, however we do not warrant or represent that the information is free. Stm16 16 fold spectroscopy amplifier with discriminators and multiplicity trigger. Mpf102 datasheet88 pages motorola jfet vhf amplifier. Motorola smallsignal transistors, fets and diodes device data 3 nf, noise figure db 2. Major brands mpf102 transistor jfet n channel 3pin to92 bulk. This radio is sensitive enough to tune 20 stations across the fm band, some with volume high enough to drive a small pm speaker.
Motorola order this document semiconductor technical data by mpf102d jfet vhf amplifier nchannel depletion mpf102 1 drain 3 gate 2 source maximum ratings rating symbol value unit drainsource voltage vds 25 vdc 1 2 3 draingate voltage vdg 25 vdc gatesource voltage vgs 25 vdc case 2904, style 5 gate. Mpf102 fet preamplifier under repositorycircuits 44815. Onsemi, alldatasheet, datasheet, datasheet search site for electronic components and. Motorola, alldatasheet, datasheet, datasheet search site for electronic components and. The gate resistor is normally anywhere from 1 meg to 100k. I am looking for a transistor similar to the mpf102. Home components hardware boards books kits futurlec the electronic components and semiconductor superstore. A voltage or current applied to one pair of the transistors terminals controls the current through another pair of terminals. Heat sinks and fans increase the ability of a transistor to dissipate heat. Mpf102 datasheet18 pages motorola jfet vhf amplifier. Mpf102 g to92 s d nchannel rf amplifier this device is designed for electronic switching applications such as low on resistance analog switching. Most jfets are nchannel rather than pchannel devices.
Mpf102 device code a assembly location y year ww work week pb. The first highfrequency transistor was the surfacebarrier germanium transistor developed by philco in 1953, capable of operating up to 60 mhz. Mpf102 datasheet, mpf102 pdf, mpf102 data sheet, datasheet, data sheet, pdf. Antique radio forums view topic ig102 to fet conversion.
Recent listings manufacturer directory get instant insight into any electronic component. Mpf102 mixer av rf modulator ic data book free download 2n2222a plastic. Major brands mpf102 transistor jfet n channel 3pin to92 bulk 3. These parts were available over the web, with free shipment to your local store. Minimum i dss can be less than 2, but must not be greater than 2. This seemed to work as expected,however with no buffer between the tank circuit,and the rf output meter part of the circuit,the oscillation soon died.
Motorola order this document semiconductor technical data by mpf102d jfet vhf amplifier nchannel depletion mpf102 1 drain 3 gate 2 source maximum ratings rating symbol value unit drainsource voltage vds 25 vdc 1 2 3 draingate voltage vdg 25 vdc gatesource voltage vgs 25 vdc case 2904, style 5 gate current ig 10 madc to92. Yet since radio shacks 2015 reorganization, the web site can no longer fix you up with these equivalents. Mpf102 jfet mpf102 circuit application mpf102 transistor mpf102 equivalent mpf102 application note mpf102 y parameters mpf 102 mpf102 mpf 102 text. I can recall the days before the mpf 102 was so widely known and we used the motorola hep801 and hep802 series of transistors. The circuit is very simple and easy to build using only one transistor mpf 102 and few other components. A more elaborate hartley design with a buffer and regulated power supply to the oscillator fet q1. The listing, brand new radio shack mpf102 fieldeffect transistor nchannel 2762062 has ended. Preliminary first production this datasheet contains preliminary data, and supplementary data will be published at a later date. A diode junction separates the gate from the channel. Junction fieldeffect transistors are very sensitive devices, requiring practically zero current to drive them into either cutoff or saturation. Mpf102 mpf102 jfet nchannel transistor datasheet futurlec. Mpf102 on semiconductor datasheet and cad model download.
The jfet device equations the circuit symbols for the junction fet or jfet are shown in fig. This article describes the active antenna for am fm sw mpf102. Free packages are available maximum ratings rating symbol value unit drain. For the first design example, we will use an mpf102 transistor with a vcc of 12 volts. Junction fieldeffect transistors jfet worksheet discrete. Brand new radio shack mpf102 fieldeffect transistor n. This data sheet is for the plastic version of this old work horse transistor. Preliminary first production this datasheet contains preliminary data, and supplementary data will be published at a. Fairchild, alldatasheet, datasheet, datasheet search site for electronic components and. A to5 transistor with a p d of 3 watts might be able to dissipate 810 watts with a heat sink.
It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. One transistor fm receiver by mpf102 circuit wiring diagrams. Ive bought a copy of the book on ebay, and before i mess with it, id like to read the original. This circuit has a only 18inch antenna, when used with short wave the radio receiver will be able to receive signals from stations around the world more clearly. Mpf102 nchannel rf amplifier learning about electronics. General purpose nchannel junction field effect transistor. Mpf102 transistor datasheet, mpf102 equivalent, pdf data sheets.
It is a circuit to try to work on many brands of radios. Mpf105 plasticcase junction fieldeffect transistors. After some adjustment of this potentiometer, the student is able to obtain good amplification from the transistor signal generators and oscilloscopes have been omitted from the illustration for simplicity. The maximum i dss must exceed your circuits peak drain current. Jfets are lowpower devices with a very high input resistance and invariably operate in the depletion mode, i. The circuit components can help you understand better grasp this principle. In addition, ive mocked up a schematic using the original ig102 schematic from the description in the one webpage i found. Figure 2 lists the basic characteristics of these two devices this months article looks at basic usage information and applications of jfets. Thats not to say that a bjt isnt better when you take all the production issues into account. Datasheet identification product status definition advance information formative or in design this datasheet contains the design specifications for product development. I also added an ultrabright 10ma red led to replace the incandescent bulb. The 2n2222a is featured in many transistor tutorials on this site. There are two types of devices, the nchannel and the pchannel.
Mpf1028motorola smallsignal transistors, fets and diodes device datapackage dimensionscase 02904to226aanotes. Just as a guess, its probably because so many published circuit designs call for the lowly mpf102. The purpose of the potentiometer is to provide an adjustable dc bias voltage for the transistor, so it may be operated in classa mode. Online shopping for jfet transistors from a great selection at. Mpf102, mpf102 datasheet, mpf102 jfet nchannel transistor datasheet, buy mpf102 transistor. Ecg90 maximum ratings at tc25c unless otherwise noted. I used another circuit again,based around a single mpf102,without the weird positive ground connection,leaving the meter half of the circuit as is. This is a simple active antenna circuit, for the radio receiver swmwfm band. A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. This design was also used in 1995 as the main vfo in a transceiver design, using ne602a as a mixer. Absolute maximum ratings ta25 degree c unless otherwise noted symbol parameter value units v dg draingate voltage 25 v v gs gatesource voltage 25 v igf forward gate. Mpf102 datasheet, mpf102 pdf, mpf102 data sheet, mpf102 manual, mpf102 pdf, mpf102, datenblatt, electronics mpf102, alldatasheet, free, datasheet, datasheets, data. Motorola order this document semiconductor technical data by mpf102 d jfet vhf amplifier nchannel depletion mpf102 1 drain 3 gate 2 source maximum ratings rating symbol value unit drainsource voltage vds 25 vdc 1 2 3 draingate voltage vdg 25 vdc gatesource voltage vgs 25 vdc case 2904, style 5 gate current ig 10 madc to92.
Semiconductor transistor, diode, ic cross reference. Mpf105 datasheet plasticcase junction fieldeffect transistors. Compare pricing for on semiconductor mpf102 across 3 distributors and discover alternative parts, cad models, technical specifications, datasheets, and more on octopart. Major brands mpf102 transistor jfet n channel 3pin to92. Mpf111 description low power field effect transistor casestyle to 72 geometry fn2. Nchannel rf amplifier, mpf102 datasheet, mpf102 circuit, mpf102 data sheet. This item major brands mpf102 transistor jfet n channel 3pin to92 bulk 20pcs 2n5457 jfet nch gp 10ma to92 20pcs 2n5458 ic jfet nch ss gp 25v to92. Maximum power, called p d, is the overall power a transistor can dissipate, through heat, without burning up. Semiconductortransistor crossreference list peavey. Its dirt cheap and is usable from dc to up to rf of up to say 15 mhz.
Just as a guess, its probably because so many published circuit designs call for the lowly mpf 102. For resistor r3, the gate resistor, we will use 1 meg for a very high impedance across the gate. For example, in this circuit, you can go to find and buy these components. Specifications may change in any manner without notice. Im making a contact microphone circuit and they say to use a mpf 102 transistor. This datasheet contains the design specifications for product development. We will allow no more than 5 ma of drain current under any circumstances. Again, the minimum is more important than the maximum. Each device has gate g, drain d, and source s terminals. Motorola smallsignal transistors, fets and diodes device data. Top results 6 part ecad model manufacturer description datasheet download. The drain and source connect through a semiconductor channel.
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