Mpf102 vs 2n5457. MPF102 V pinch-off range -> -0.

Mpf102 vs 2n5457. Aug 9, 2020 · This post contains information about MPF102 pinout, equivalent, applications, explanation, specifications, features and many other useful information about this JFET. If you want a MOSFET, try the 2N7000 or BS170. in the table below, we aim to compare the electrical specifications of mpf102, 2n5457, and j201 jfet devices, providing valuable. I'm dropping it into a Morning Glory Clone and it comes in towards the end of the schematic. The J201 has the lowest Vgsoff I've seen. As an alternative to all the LPB-1 type boosters out there, try a Fetzer Valve instead! Note: reverse-threaded titanium muffler bearings are Dec 11, 2024 · Find many great new & used options and get the best deals for Cmatmods Brownie 2012 / Evh Brown Sound Distortion Fairchild J201 Mpf102 2N5457 at the best online prices at eBay! Free shipping for many products! 2N4222 vs MPF102 Compare result: 2N4222 ,MPF102 . Discover our collection of JFET SPICE & LTspice models for precise circuit simulation. Jul 26, 2018 · I could buy a bunch of 2N5457 smd (with the mini PCB and maybe the 3 Pin strip angled, adding costs!) and matchin them by myself. The result The 2N3819 is a low-cost, all-purpose JFET which offers good performance at mid-to-high frequencies. there is a whole lot more info on the OS circuit as well May 10, 2025 · 2N5454 VS 2N5457 JFET ( Transistor ), 2N5454 Datasheet, 2N5454 Vs 2N5457 JFET, Transistor, 2N5454 pdf, 2N5454 pin information, schematic. A J201 will work, but produces a slightly lower output. En las décadas de los 70 y 80 parecía que iban a dominar los diseños de las etapas de RF y conversor (mixer) en los receptores de HF caseros. Be sure to align the pinout with the figure below. Description: N-Channel General Purpose Amplifier. J201 in Tillman Circuit Objective To find out if the MPF102 has any positive gain in the Tillman JFET preamplifier circuit. I know the Rat uses it, and I may start there, but am wondering if there is a better or more simple place to start. Have you searched for all of these? Where are you ordering to (as in country)? I managed to get some J201's on eBay, it ended up being about £2-£3 each I think? Typical devices that I would suggest here are the J201, 2N5457, 2N5486, 2N3819, MPF102, BF245, 2SK117, 2SK130 and similar parts. com. Unfortunately you have to buy tempcos from Thonk or Synthcube. Mar 23, 2009 · They're both JFETs so you could go for 2N5457, 2N5458, 2N5459, 2N5484, 2N5485, 2N5486, MPF102. TRANSISTOR MPF102, J113, 2N5485, PF5102, 2N5457 DSGHome> TRANSISTOR MPF102, J113, 2N5485, PF5102, 2N5457 DSG Oct 13, 2008 · Same goes to 2N5457, 5458 and 5459, where all three JFETs are treated with the very same parameters. Similar functions The functional characteristics of the device are consistent, but the main parameters are inconsistent, and the circuit structure can be modified and replaced. Given that you need to sort through a pile to get the sets needed for some projects that's a stiff premium. I would use the 2N5457 2. I think the 2N5457 may yield higher gain though. File Size: 270Kbytes. May 8, 2014 · J201's & 2N5457 multiple sources testing Started by selfdestroyer, May 08, 2014, 04:46:58 AM Previous topic - Next topic The 2. Under 15 VDC power, the IDSScurrents remained the sameas at 9 VDC power. Testing Continuity of an N-channel JFET Testing continuity through the drain-source channel is another matter, though. So, I don't have a 2n5457 but I do have some J201s and read that you can replace one with the other. I am an electrician by trade. Most Fets were 2N5457 and 2N5458s and though there was the tendency that the 2N5458s have a higher pinch off voltage and higher Ids-on, but both types were in the same range (Vp from 1. i have to do? Nov 22, 2012 · Here are the datasheets for the 2N5457 and 2N5484 N-Ch J-Fets (Note:The datasheet for the 2N5459 is also for the 2N5457): You do not have the required permissions to view the files attached to this post. If replacement, please be sure to read the data document RF Small Signal Field-Effect Transistor, 1Element, Silicon, N-Channel, Junction FET, TO-72 MPF102 VS BFW11 Public sources and various open projects of my collection - sergev/vak-opensource Dec 18, 2003 · 2n5457 vs. First lesson: the J201 saturation Mar 18, 2011 · This pedal requires 2 2N5457 transistors but SmallBearElec. But I suppose we should get handy with SMD soldering if we want to continue using JFETs in the long term. It is the same between J201 and J202. 5 to -1V). The J310 is a high-Idss device, much higher than the general JFETs like your MPF102, 2N3819, 2N4416, etc. But I have still had very good results designing circuits for them. Here is a link to the kit from Musikding: Brownieの現行モデル（左・2012年製）のFET MPF102×2個をJ201×2個に載せ変え、旧来品（右・2008年製 FETは2N5457×3個＋J201×2個搭載）と同じFET構成にしての Apr 30, 2005 · It means that 2N5458 has a higher operating voltage and it can have a higher output than 2N5457 and a 2N5458 has a higher gain factor. Jul 4, 2013 · * Copyright (c) 2000-2012 Linear Technology Corporation. SSM2210 is obsolote but it can be replaced with SSM2212 and it's available on Mouser. The datasheet specs are in white, and I added your avg measurements to mine (in the green columns): Q1 – J201, 2N5457 or MPF102 Transistor Hardware 2 ¼ Inch Mono Input Jacks DC Input Transistor Socket 1590A Hammond Enclosure Preparation There are a couple of different options when building this buffer. It features low noise and leakage and guarantees high gain at 100 MHz. J201 have much, much more gain, at least twice as much and sometimes three times as much as a 2N5457 (~6dB for the 2N5457 vs. May 6, 2004 · Transistor EquivalentYou can try any npn with hfe over 500. Bias current around 70–200 µA (via R3 and a current source bias) ensures low power draw and transparency. To set the desired bias point, measure and adjust the votlages at the designated "Rs" and "Rd" pads. This portable amp is an open hardware project designed by ElectroSmash using only free / open-source tools. Input impedance is set by R2; values up to 10 MΩ are acceptable. Jun 16, 2024 · 2N5457 is "adequate," and I'm willing to bet you have a couple in your parts bin, but it's only 1. Die Unterschied, Alternative, Äquivalent von J308-TR1-E3 und MPF102. So on a PCB meant for an MPF102, adapting it is possibly but messy. 0, Idss range -> 2 to 20 mA. This JFET is an N- Channel - Depletion layer JFET that is widely used in audio equipment for amplification, tone modulation, and other purposes. Educate me please. Adjust R1/C1 for your preferred RF cutoff—it defaults around 33 kHz at 4. model kp365 njf vt0=-1. In future post I will take a look distortion and noise; you During our testing of the circuit, we noted that while a J201 provided more gain than an MPF102 or 2N5457, the overall tone was also darker in comparison. 03 rd=8 rs=8 cgs=4p cgd=5p pb=1 is=50p fc Testing a JFET with a multimeter might seem to be a relatively easy task, seeing as how it has only one PN junction to test: either measured between gate and source, or between gate and drain. File Size: 105Kbytes. Another Great Jfet is the NTE458, which is a little higher gain yet than a J201. 5V of headroom. I'm not interested in Fairchild or NEC Jul 11, 2006 · The 2N5458 and 2N5458 are pretty close replacements of the MPF102 in termos of both Vp and Idss. I've come across one or two places but they either are very high priced or have a huge minimum order. Also, Ruby was developed using a JRC386D (available from Small Bear Electronics), but any 386 can be used, including the type sold at RadioShack. La curva de transferencia de un FET sigue The jfet transistor Q1 can be any common small signal device such as the 2N5457, MPF102, or J201. Here are some of the plots of the JFET(s) I have been looking at. Just as everything electronic gets replaced, op amps were a newer technology to replace transistors in many applications. Can anyone suggest a replacement? I can't seem to… Nov 14, 2008 · BTW, rockby. Nov 5, 2024 · The MPF102 N-Channel JFET captures significant attention in electronics, primarily celebrated for its contributions to low-power amplification and electronic switching. O 2N5457 é um JFET de canal N de baixa e alta e alta entrada de entrada de entrada usado em amplificadores, osciladores, mixers, interruptores e circuitos de sinal analógico. I will show the design step by step on how to design a JFET amplifier using any existing N channel JFET through looking at the data sheet of the product. He The 2N5457 device was a Chinese “Fairchild” JFET from eBay. Can anyone suggest a replacement? I can't seem to… Find many great new & used options and get the best deals for Cmatmods Brownie 2012 / Evh Brown Sound Distortion Fairchild J201 Mpf102 2N5457 at the best online prices at eBay! Jan 1, 2013 · JFET 2SK44SP substitute: 2SK30A or 2N5457? Started by Bucksears, January 01, 2013, 06:21:06 PM Previous topic - Next topic You could potentially substitute it for another JFET like a BF245C, MPF102, or 2n5457 but it depends what it's doing in the circuit - the J201 has quite a high gain compared to most JFETs so if it's in an overdrive I wouldn't substitute it, but for just about anything else it's likely fine. cheers Dec 9, 2020 · 2N5457 is an N-Channel Depletion layer Junction Field Effect Transistor. Aug 9, 2025 · Difference between 2n5457 and 2n5458A few month ago built the JFet test circuit (I think it's by R. Two of the oldest and best known n-channel JFETs are the 2N3819 and the MPF102, which are usually housed in TO92 plastic packages with the connections shown in Figure 1; Figure 2 lists the basic characteristics of these two devices. Este artigo descreve sua configuração de pinos, aplicações de circuito comum e Nov 20, 2019 · 2SK117 are hotter and have lower Vgs than Mpf102 and 5457. I just realized that they stopped making 2N5457's, which the Rat circuit requires. Mar 3, 2015 · Transistor 2N5457 TO-92 JFET N Channel 25 Volt: Amazon. g. 015 input cap, with a 1uF np output cap and a JRC4558 opamp. Vishay Siliconix VS MPF102 Fairchild VS 2N4222 Central Semiconductor Buy from AiPCBA Buy J308-TR1-E3 Buy MPF102 Buy 2N4222 Description Trans JFET N-CH 3Pin TO-92 T/R J308-TR1-E3 More replace part JFET N-CH 25V 20mA TO92 MPF102 More replace part Junction FETs Low Frequency/ Low Noise Datasheet View Datasheet PDF View Datasheet PDF Manufacturer Jan 23, 2015 · One of the problems with the FJN598J as a substitute for MPF102/2N5457/J201 is that the pinout is not compatible. Aug 20, 2014 · Hi all, I'm currently studying to get my diploma in electrotechnology. But in general, the following work at least closely in gain circuits and have similar resistance across them for variable resistor purposes: BF245A, 2N5952 (backwards), possibly 2N5485, and 2SK30 (dgs pinout). Put it in Q1 and use the MPF102 you have for the output buffer if you don't want to order some replacements. e. However, there are many integrated and discrete applications where JFETs are better suited. Quotes, samples and datasheets available at Jameco Electronics. Can I use that transistor? or any replacement for MPF102? thanks May 26, 2005 · MPF102 - check pinout but I think it's the same as J201/5457 on the ones I have. Page: 4 Pages. They all will work quite well. Here's what another forum member wrote to me in a recent e-mail: Quote from: stm On another subject, the other day I built the Fetzer valve into my computer simulation, both with J201 and MPF102 (using the SPICE models provided by the manufacturer). com sent me 2 2N5458 transistors instead of 2 2N5457 transistors. Note, pinouts may differ. Alternatively, try a 2N5856. ), sorted all my JFets in gain groups and color coded them (Tropical Fish Fets - the ultimate Mojo-Boost ). Thank you build gurus. May 13, 2021 · Optional transistors, J201, MPF102. Conhecida por sua versatilidade e facilidade de integração, ele suporta controle preciso do sinal em uma ampla faixa de tensão. Features / Technical Specifications: Drain and source are exchangeable. The subject I am studying in analogue circuits. later produced the same IDSSvalues at 9 VDC. I would recommend allocating $100 and getting an assortment of transistors and opamps etc from futurlec - they are the cheapest source I know for many parts. Similar functions The functional characteristics of the device are consistent, but the main parameters are inconsistent, and the circuit structure can be modified and replaced. This goes beyond the biasing requirements. Anyone have suggestions on which parts work best/well in Ruby type amps? I'm looking at the 2n5951, 2n5457 and whatever else folks might recommend. To put a fourth output on the stripboard, merely duplicate columns 14 through 18 at the right side starting with the new column 19. Sourced from Process 55. BIASING Use trimpots that are at least twice the expected value of Rs and Rd. Sep 20, 2025 · Not so interchangeable. Hi everyone. In fact, the characteristics of the MPF102 lie in between them, perhaps a little closer to the 2N5458. Sep 21, 2025 · Alternatives to J201 and MPF102?Quote from: Kirfew on December 22, 2010, 11:41:59 PM I'm building a pedal that needs a J201 or MPF102 in a buffer, but my local electronics store doesn't carry either of those JFETs, but they do have 2N3819's and BF245A's. Are you after a JFET or a MOSFET? The MPF102 is similar to the 2N5457 and 2N5458. Jun 30, 2025 · Use any general-purpose JFET—2N5457, J201, MPF102—with the same pinout (stompville. 3. 2M R1 resistor is optional and is provided to eliminate pops when the footswitch is actuated. FET Preamplifier, Part 6 Experiment: MPF102 vs. (The RF System's DX-1 Pro and the Amrad whip-amp use an RF power VMOS FET with much higher input capacitance. in a VCO core). , J201, 2N5457, 2N5458, MPF102). Discussion Apr 29, 2016 · you can use 2N5457 or PN4391 instead of the MPF102. ) BF245 Transistor Explained / Description: I've read quite a few of Jon's posts where he speaks about how much gain the flabulanche makes, so for my purposes (which never foray into metal or anything resembling post-1980s rock n' roll) I figured a lower gain transistor (mpf102 vs. MPF102 vs MPF102G Compare result: MPF102 ,MPF102G . Feb 15, 2013 · Si te refieres al Noisy Cricket o similares, con el 2N5457 va de lujo, mejor que con el J201 que tiende mucho a enguarrar el sonido incluso con gain 0. Its TO-226AA (TO-92) package is compatible with various tape-and-reel options for automated assembly (see Packaging Information). Feb 3, 2006 · The best options I have tried are 2N5457 and 2N5484, but these are not equivalent to J201, and the circuits end up with less gain. The latter are getting to hard to find and I've seen sellers that have bad reviews/sell fakes. In the world of guitar audio, they were at one point a new invention intended to replace old tube technology. . * . Nov 14, 2008 · BTW, rockby. Aug 13, 2025 · I'm looking local to buy 2SC1815, 2SC945, 2N3819, MPF102, and 2N5457 transistors. 13dB for the J201). SPeter Cap Cooler Information Posts: 553 08 Jan 2008, 22:10 Has thanked: Been thanked: 09 Nov Oct 7, 2015 · However, if you are using for a different model, maybe the closest jfet you can get is the 2N5457, 2N5458 or MPF102. Oct 31, 2012 · i find the MPF102 a hard to get part here, the BF245 would be much cheaper and is widely available however, some circuits still use the MPF102 as switch (i. Download. Apr 21, 2008 · I'm about to order some parts to try in place of the MPF102 I've been using with my LM386 amps. Jan 13, 2022 · I'm building a Glory Hole and I would really like to avoid the extra shipping charge to order 5457s from a different vendor. It is interesting that the RIP old K170 get all the talk, people are looking for a substitute. Sep 13, 2021 · What would be a good substitute for a 2N5457 in a Bluesbreaker circuit? I’ve included the schematic if that’ll help. View all View all View all More replace part 2N5457 More replace part 2N5457_D75Z More replace part - Aug 15, 2016 · How much volt should i give if i replace j201 with 2n5457. There is no point in listing "NKT275" for anything. com: Industrial & Scientific i looked up a datasheet on MPF102 but all i found was "this device was designed for electronic switching such as LOW on" <--- does that mean 0V @ gate == on? Jan 29, 2015 · 2n5457 substituteWell, without knowing what circuit it's in or its application, it's very hard to say. Gate leakages are typically less than 10pA at room temperatures. The transistor is part of the input buffer. It seems like the pedal is based around these two transistors so I just want to make sure that the 2 2N5458 transistors are identical to the 2 2N5457. J308-TR1-E3 ; MPF102 . The MPF102 amplifies small audio signals from microphones or other sources. You probaly can't get J202's any better than Buy 2N5457 Buy 2N5457_D27Z Buy 2N5457_L99Z Description Small Signal Field-Effect Transistor, 1-Element, N-Channel, Silicon, Junction FET, TO-92, TO-92, 3 PIN JFET N-CH 25V 625mW TO92 2N5457_D27Z More replace part Trans JFET N-CH 3Pin TO-92 T/R 2N5457_L99Z More replace part Datasheet View Datasheet PDF View Datasheet PDF Manufacturer InterFET Nov 22, 2012 · Here are the datasheets for the 2N5457 and 2N5484 N-Ch J-Fets (Note:The datasheet for the 2N5459 is also for the 2N5457): You do not have the required permissions to view the files attached to this post. In the two years since the Fetzer Valve was first published in the midst of our adaptation of tube amps for use as distortion pedals, the circuit has enjoyed popularity as a standalone booster and as a building block in larger circuits. R8 may be eliminated if not needed. The bias does not have to be 4. I've looked for years and so have other people as close or closer to the germanium biz than me. 2K value is just a suggested beginning value. This PCB is compatible with both through-hole and SMD n-type JFET transistors (e. A couple of years ago I plotted transconductance vs Von for my whole JFET collection and got a solid correlation. This article explores its features, pin configuration, working principles, applications, and suitable Sep 21, 2025 · I generally associate a darker, but higher gain sound with J201 and a bright low-gain response with MPF102. Mind the pinouts, though Feb 1, 2009 · Oh yeah, and I am using one MPF102 and one 2N5457, so the JFETs do not need to be matched. You may need to adjust some resistors using this procedure: Nov 24, 2024 · Cmatmods Brownie 2012 / Evh Brown Sound Distortion Fairchild J201 Mpf102 2N5457 Rating Symbol Value Unit Drain−Source Voltage VDS 25 Vdc P Search (manufacturer PN): P Results 4233 63223 References in database Max list size 10 For Audio IC please check Audio IC Circuits The 2N5457 Fets in question were sanded dull on the face, whereas all of the hundreds of others in my drawers have the same shiny face as the rest of the body. Easy to make, inexpensive and excellent performance. If you have to use the transistor (MPF102) that you have, try a 1N4001 diode instead of the LED. 2N Series General Purpose Transistors Comparison Tables, 2N Series Transistor Datasheets Do you mean low transconductance? If so, the MPF102 is a candidate. Considering that the smd should be most accurate (or it just a suspect?), how many transistor I could buy? 30? 40? 100?! Of course I would spend the same or even less than a quartet matched transistors. Was wondering if 2N5458 would work as a replacement or if there are any other options? I have minimal knowledge so wanted to reach out to all of you here and see if I could Jul 3, 2023 · learn more through Understanding the Pin Configuration of the 2N5457 Transistor blogs, projects, educational articles and product reviews all in one places. An exceptional substitute for the MPF102, 2N5457, and J201, maintaining the same pinout orientation. 0). These all have the same DSG configuration as the J201 but would have to be turned 180º if used as replacements for the 2N5952 (GSD). MPF102はちょっとゲイン不足でボツ。 J201と2N5457の比較だが、J201の方が中音が抜け高音にエッジが立っていて、いかにもValveって感じがする。 This PCB is compatible with both through-hole and SMD n-type JFET transistors (e. 1Wamp Electric Guitar Amplifier - Open Hardware 1Wamp is a one Watt small guitar amplifier based on a JFET guitar pre-amp, the Big Muff Pi tone control, and the LM386 power amplifier. . But, I don't know why a design would call for one over another. May 10, 2005 · J201 Replacement ?Because Jfets vary from one unit to the next among say J201's, the substitutes part #'s [like 2n5457's] will probably work anywhere from 'great' to 'just wonderful' but some people may be able to type better about differences they were able to discern. 2n5457) would bring it closer to what I want boy did it ever. MPF102 V pinch-off range -> -0. Nov 23, 2018 · J201 and 2N5457's are used frequently in all sorts of popular buffer stages and distortion pedals. Dec 21, 2023 · 歪みが少なくなります。 MPF102 は 2N5458、ひいては 2N5459 の代替品となりますが、Vp と Idss が 2N5457 よりも大幅に小さい J201 は別のカテゴリーです。 要約すると、アンプには J201 と 2N5457 が推奨され、フェイザーには 2N5459、2N5458、MPF102 が推奨されます。 MPF102 N-kanal JFET fångar betydande uppmärksamhet inom elektronik, främst firad för sina bidrag till lågeffektamplifiering och elektronisk växling. Apr 19, 2019 · 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. Remember from the last section how a stored charge across the capacitance of the BSIAB + MPF102?#3 July 25, 2005, 10:31:45 PM i built my BSIABII with 4 NTE458s and a 2N5457 (the one closest to output) it has some serious oscillation issues, and i don't even have enough wire to get the board out of the box pedal board + buffered pedals = saving my life A Comprehensive Overview of MPF102 JFET Circuits The MPF102 JFET is a versatile transistor commonly used for amplification and switching in electronic circuits. But then on the Ruby circuit, taking the Source as reference, the Gate would be at -9V above the -8V needed to reach cut-off voltage on a MPF102 and -6V with a 2N5457. All practical circuits Dec 22, 2018 · SOLVED - Can't Bias JFET in the Jack Orman FET Output StageThe variations in jfets, even within the same part number, will determine what values it takes to get the bias right. Replacement or equivalent transistors for mpf102 are bf245c, bf245b, 2n5457, 2n5458, nte457, j113, 2n3819. Enhance your electronic designs with InterFET's high-performance JFETs. Brand name only parts made by Motorola, Phillips, Toshiba, National, etc. Are there changes I need to make to the passive components or can I just swap them? (maybe with minimal sound difference to the original but that's fine) The 2N5457 JFET in SMD format, pre-soldered to adapters for use in through-hole applications. You could also use something like the 2SK117 or 2SK170 but they are both DGS so you would have to alter the scheme to reflect that. MPF102_D74Z vs 2N5486_D74Z, MPF102_D74Z: Trans JFET N-CH 3-Pin TO-92 Ammo, 2N5486_D74Z: IC AMP RF N-CHAN 25V 10MA TO-92 Hi everyone. Dess tillämpning blir ännu mer uppskattad när minimal mot motstånd har betydande relevans. regards, Jack AMZ Guitar FX Projects and Schematics --- Guitar Effects Explained Jul 19, 2022 · I've used an out of spec 2n5457 in a Rat and it worked fine. A couple of points that might help. Jan 18, 2025 · I recently purchased some 2N5457s and 2N5458s and am wondering if there are some simple pedal circuit schematics out there that use those transistors. Its application becomes even more appreciated where minimal ON resistance holds substantial relevance. You can either build it using the kit/PCB from Musikding or you can build it using stripboard. Manufacturer: Motorola, Inc. I have j201s on the adapters and I have 5458s, will either of those sub in this application? Also, how to I get moar smort about transistors? (Namely when it's Aug 18, 2005 · Simplicity and utility, aslo fewer parts per build has created a lean towards starting with j201's or 2n5457'swith suggestions that MPF102 be subbed in. Typical devices that I would suggest here are the J201, 2N5457, 2N5486, 2N3819, MPF102, BF245, 2SK117, 2SK130 and similar parts. BC547/548/549/550 from the C series shoud do the trick, but only the 550 has the same noise figure of the 5088. 2N5457 V pinch-off range -> -0. These transistors share similar characteristics and can be used as alternatives in certain applications. When designing circuits based around JFETs, simulation tools such as LTspice can be used to verify the Oct 7, 2015 · However, if you are using for a different model, maybe the closest jfet you can get is the 2N5457, 2N5458 or MPF102. Other nearest Possible replacements are 2N4416, NTE312, 2N5638, 2N5640, 2SK162, 2SK518 (Always check pin configuration of the transistor you are replacing with the BF245. Genius is not all about 99% perspiration, and 1% inspiration - sometimes the solution is staring you right in the face. I'll bet there's a reasoning behind the MPF102, I'm thinking it's smaller gains spread over more stages to get 'the same thing only different'. For germanium devices, the Part #: MPF102. Part #: 2N5457. -Frequencycentral. If replacement, please be sure to read the data document RF Small Signal Field-Effect Transistor, 1Element, Very High Frequency Band, Silicon, N-Channel, Junction FET, TO Find many great new & used options and get the best deals for Cmatmods Brownie 2012 / Evh Brown Sound Distortion Fairchild J201 Mpf102 2N5457 at the best online prices at eBay! Free shipping for many products! Find many great new & used options and get the best deals for Cmatmods Brownie 2012 / Evh Brown Sound Distortion Fairchild J201 Mpf102 2N5457 at the best online prices at eBay! Free shipping for many products! Aug 16, 2006 · I dont have MPF 102 for ruby, the man in electro store suggest me to use A564. The question is, can we substitute the 2N5457 without adjusting other component values? The answer varies from maybe through probably to absolutely, depending on the requirements of the circuit. An additional resistor (R8) is provided to power an LED indicator and the 2. Manufacturer: Fairchild Semiconductor. There has been some interest in installing buffer circuits inside a guitar, to make the output signal clearer, more robust and unaffected by cable lengths and input impedances downstream. Based on the measurement of several JFETs, I have tweaked the SPICE models for VGS (off) and IDSS representative of the devices I *actually* have, so I get far more accurate and representative results in the simulation. This is what made me suspicious, and some also looked like they were restamped. 2n5458 Started by Samuel, December 18, 2003, 07:51:17 PM Previous topic - Next topic Print Go Down Pages 1 Mar 15, 2005 · The jfets are used as clipping diodes in the Fat Gnat so use whatever devices you have around. I like J112s especially for output buffers since you can get a lower output impedance compared to a 2n5457 or J201. It is up to you, experiment, use sockets for the transistors and try it first. Delving into its diverse applications reveals insights into its extensive employment across a multitude of circuits. 7 kΩ and 470 pF (stompville. MPF102G vs MPF102_D27Z, MPF102G: Trans JFET N-CH 25V 3-Pin TO-92 Bulk, MPF102_D27Z: FAIRCHILD SEMICONDUCTOR MPF102_D27Z JFET Transistor, JFET, 25 V, 2 mA, 20 mA, 8 V, TO-92, JFET MPF102_D27Z vs MPF102G vs J211_D27Z, MPF102_D27Z: FAIRCHILD SEMICONDUCTOR MPF102_D27Z JFET Transistor, JFET, 25 V, 2 mA, 20 mA, 8 V, TO-92, JFET, MPF102G: Trans JFET N-CH 25V 3-Pin TO-92 Bulk, J211_D27Z: IC SWITCH RF N-CH 25V 10MA TO-92 Jan 4, 2013 · -) I used the 2N545 because it was recommended on some forum as the best sounding of the bunch that is mentioned by Jack Orman as possible alternative for the Mini Booster (he mentions the J201, 2N5457, MPF102, BF245and NTE458). AFAIK a 2N5457 or MPF102 should be a pretty good alternative despite the different pinout. Oct 8, 2021 · Wrapping up the Pharmacist build and wondering if I can use J201s as a sub for the 2n5457s. The circuit im working on is JFET characteristics and it In the two years since the Fetzer Valve was first published in the midst of our adaptation of tube amps for use as distortion pedals, the circuit has enjoyed popularity as a standalone booster and as a building block in larger circuits. TheMPF102 is anN-Channel Junction Field-Effect Transistor (JFET) commonly used for low-noise, high-input-impedance applications. If replacement, please be sure to read the data document JFET N-CH 25V 625mW TO92 2N5457 VS 2N5457_D26Z 2N5457_D27Z Transistors A variety of transistors What Are Transistors? Transistors are small electronic devices that can act either as switches or amplifiers. uk). Nov 26, 2020 · BF245 can be replaced with BF245B, BF245C, 2N5457, 2SK117, MPF102, 2N5458, BF244A, BF256A, NTE457, J113, 2N3819. uk, muzique. 2N5458 or 2N5457. mac mac@mac-pc:~$ sudo apt install ECC83 EL84 no such packages, but you can install "Quad Cortex", "Helix" or "Kemper" instead. During this we do exercises on a program called multisim (I've got version 12. It's also the defacto device (along with the same die in a metal can, the U310 which is what I use) for almost all active whip-amps that use a JFET as the input device. 2012年後半に出荷されたものには交換用2N5457は付属されていません。 現在すでに2N5457、J201、MPF102ともCMATMODSで採用している Fairchild（フェアチャイルド社)製のものは全て生産中止となって おりますので、2N5457の入手が困難な方はサウンドアルファスタッフに ON CHARACTERISTICS Zero-Gate-V oltage Drain Current (Note 1) (VDS = 15 Vdc, VGS = 0) Posted in PSpice Modeling from Datasheet and tagged JFET SPICE model, JFET SPICE modeling, modeling from datasheet. The CENTRAL SEMICONDUCTOR 2N5457, 2N5458, and 2N5459 are silicon N-Channel JFETs designed for switching and amplifier applications. Jan 22, 2024 · In the table below, we aim to compare the electrical specifications of MPF102, 2N5457, and J201 JFET devices, providing valuable insights for the replacement process. Inauguro este capítulo comenzando por los transistores de efecto de campo. com: Industrial &amp; Transistor 2N5457 TO-92 JFET N Channel 25 Volt: Amazon. ) The J308 Mar 6, 2015 · Flabulanche - bias voltage values & JFET questionJ201 is very, very different from 2N5457 and inappropriate for this effect as designed. au have the 2N5088s and 2N5457, but are more expensive than futurlec. An MPF102 FET is specified for the buffer, though a 2N5457 will offer similar results. perhaps because the power voltage was 9 volts, instead of the manufacturer-specified 15 To check that hypothesis, further tests were necessary. Un saludo Sep 7, 2024 · Re: Counterfeit JFETs from Amazon by Ebolatone » Mon Sep 09, 2024 9:37 pm Welcome to modwiggler! Are you repairing a circuit specifying MPF102 or a circuit where MPF102 was recommended as a substitute for obsolete components? There were some Buchla 258 projects around recommending MPF102 to replace the 2N4341 in the waveform section. if you look at the datasheet, you see that the other "replacement" fets are not a perfect match. It looks like the output impedance of the input buffer may be affected a little by your choice of JFET. 5v when using the LED Apr 21, 2008 · SPeter wrote: Hi, My Ruby Amp is with a 2N5457 and works like dream!!! So sweat and tasty, and with the gain on max it ROCKS! Have you compared that with other JFETs in front of the LM386? How did they compare? Hi, Yes with MPF102! Didn't like it as much as with 2n5457! Nov 5, 2024 · MPF102 N通道JFET引起了電子產品的極大關注，主要因其對低功率擴增和電子開關的貢獻而聞名。如果阻力最少具有很大的相關性，它的應用變得更加受到讚賞。深入研究其各種應用程序，可以洞悉其在許多電路中的廣泛就業。 Date 1 - 20 of 21help with jfet I've read quite a few of Jon's posts where he speaks about how much gain the flabulanche makes, so for my purposes (which never foray into metal or anything resembling post-1980s rock n' roll) I figured a lower gain transistor (mpf102 vs. The -25V InterFET 2N5457 JFET is targeted for low noise switching and audio amplifier applications. En la QST y el Handbook abundaban los diseños con JFET (FET de juntura) como el MPF102, y MOSFET de doble compuerta como el 40673. These frequencies play a role in radio communication, television broadcasting, and AFAIK the interfet J201 work ok, they actually tend to have even lower cutoff voltage than the standard fairchild/ON J201, but that is usually less of an issue than the high Vgs-off and IDSS of 2N5457, MPF102, 2N3819, etc. This device is a low level audio amplifier and switching transistors, and can be used for analog switching applications. I settled with the 2n5457 being in the middle. com). Genom att fördjupa sig i sina olika tillämpningar avslöjar insikter i dess omfattande sysselsättning över en mängd kretsar. For example, JFETs can be ideal for audio applications because of their remarkably low noise. 0, Idss range -> 1 to 3 mA. 5v, it will be more like 6v to 6. Description: JFET VHF Amplifier. Maybe it's "better" to build the Phase 90 and make a stage switch to switch between the Phase 45 and Phase 90 sound. Aug 23, 2025 · The MPF102 is frequently used in RF front-end circuits, such as radio receivers, to amplify weak high-frequency signals. MPF102 is a JFET. Feb 12, 2014 · I think for 9V supply the best choice would be a 2n5457 or low Vp MPF102, Just buy some and try measuring Vp and find a part with Vp between 1-2 volts and design the circuit using its calculator. Thanks, Bill The general ones for sale (after a quick eBay search!) are: MPF102, J310, 2N3819, 2N5484 and 2N5457 (my choice of JFET). MPF102 and 2N5457 are not really good subs for it. I planned on using a 5458 to replace the 5457 just because I have those on hand. Page: 8 Pages. Hypothesis In the Tillman circuit, the MPF102 will attenuate (lose) signal strength, rather than amplifying. First 2SK170. MPF102 onsemi JFETs 25V 10mA datasheet, inventory, & pricing. Better subs are 2N5485, 2N5292, 2SK30A and 2SK117. Note from JD: I tried the MPF102 FETS and I think I like the 2N5457 better. They also distort at a proportionately lower input signal size -- a Nov 5, 2024 · The MPF102 N-Channel JFET captures significant attention in electronics, primarily celebrated for its contributions to low-power amplification and electronic switching. A J112 is a decent replacement for a 2n5457 same deal. Mar 31, 2024 · My experience was that the 2n5457 and thd j201 had a slight difference in gain, but the mpf102 was remarkably lower that the other two. It seems that the 5457 is virtually extinct and the only reliable source for J201's is at Mouser and they are over $3 a piece. Sep 9, 2010 · I have both, some mpf102's as well I've used J201's all over the place and 2N5457's when a schematic calls for one. While the circuit has its merits, we decided to further explore it to determine if it was a truly faithful solid-state version of the familiar input stage used Jameco Electronics 2N5457 JFET Transistor. The website has the details. This month’s article looks at basic usage information and applications of JFETs. Check the datasheets for the transistors you use to i find the MPF102 a hard to get part here, the BF245 would be much cheaper and is widely available however, some circuits still use the MPF102 as switch (i. There aren't any. Example voltages are shown in the table below. In terms of the J113/MPF102, would the 5458 be an applicable replacement as well? If so what changes would have to be made? I tried to research relevant topics in regards Replacement of BF245 • BF245C • 2N5457 • 2SK117 • MPF102 • 2N5458 • BF244A • BF256A • J113 • 2N3819 • 2N4416 • 2N5638 • 2SK162 Applications VHF and UHF Signal Amplification The BF245 finds extensive use in amplifying VHF (Very High Frequency) and UHF (Ultra High Frequency) signals. Mar 15, 2019 · Can't find part: FET MPF102 or 2n5457 or compatible HarryR March 15, 2019, 1:59pm 1 The JFET is less prevalent than the metal–oxide–semiconductor field-effect transistor (MOSFET). They do, however, need to be biased, which is what you are doing when turning the trimpot. Products in stock and ready to ship. 1V Jan 14, 2007 · and there, they do make a difference IME. Sep 12, 2025 · Rafa, use the MPF102 or the BF245, it's very cheap here, the MPF102 around $0,70 (pesos argentinos eh!!), buy a bunch, around 2030 and use the JFET matcher. The 4558 sounded a whole lot smoother than the TL072 :-) FYI. Very curious as to the specific traits of each part. Jan 1, 2013 · JFET 2SK44SP substitute: 2SK30A or 2N5457? Started by Bucksears, January 01, 2013, 06:21:06 PM Previous topic - Next topic Jan 22, 2024 · 以下の表では、MPF102、2N5457、および J201 JFET デバイスの電気仕様を比較し、交換プロセスに貴重な洞察を提供することを目的としています。 The secret was low gain fets (MPF102) , with the bias pot as low as possible, a . Also Styrene caps available on Mouser. I can confirm there is definitely a pleasant sound when running the fetzer at unity volume vs dry guitar signal. 1. For similar products in TO-206AF (TO-72) and TO-236 (SOT-23) packages, see the 2N4416/2N4416A View results and find 2N5457 datasheets and circuit and application notes in pdf format. These jfets are designed for switching so phasers, fet compressors, and any audio switch application like buffered bypass are where they should work best. co. Not surprisingly, the MPF102 has a Von of -3 to -5 volts (while the big conductors like the J201 are at -0. my oc-2 clone did not sound quite right with 2n5457 or j201, but opened up once i got the 2sk30a. 2 beta=10m lambda=0. I´m not familiar with 2SBxxxx transistors, but you should find Jan 14, 2025 · Good luck mate, they are pretty darn rare. Possible Modifications Bassman Jul 30, 2019 · Hello, I have been playing with the software and hardware. J201, MPF102, 2N5457, BF245 or whatever. Other than that, you can go the nte way, but those parts are expensive and with more *random* specs. What other changes do. Has anyone tried building this particular preamp or similar project with any positive outcome? Should the preamp best be placed at the steel (pickup) output or before the amp input? Hello, for context I am building the Killer Bee pcb and was wondering if there were any alternatives to the transistors mentioned in the title. It is known for its reliability, high input impedance, and low noise, making it a practical choice for various applications. I've read quite a few of Jon's posts where he speaks about how much gain the flabulanche makes, so for my purposes (which never foray into metal or anything resembling post-1980s rock n' roll) I figured a lower gain transistor (mpf102 vs. G. And digital Sep 16, 2017 · 2N5457 and J201 replacements Started by Tuxedo3, September 16, 2017, 10:22:06 PM Previous topic - Next topic Print Go Down Pages 1 2 Jan 27, 2017 · But I ran into a problem in my country there is a great deficiency of the popular in such schemes transistors, especially J201 and 2N5457, the next replacement for the second 2N5952 and 2N5485 as Has no in TO92 housings can I find these transistors in smd packages, but have no experience soldering of small components. 5 to -8. 5 to -6. I've played with 2n5457's in some of my own designs, but they've always sounded weak to me and that's probably because I'm just used to what J201's do. Would these work, or are there others that would be okay? Those will work just fine for source-follower buffers. Sep 20, 2025 · is a 2N5457 and a MPF102 interchangeable? Started by chicago_mike, October 28, 2010, 02:27:24 PM Previous topic - Next topic Print Go Down Pages 1 As far I have figured out if we put our reference on the Source, Rs is biasing both Source and Gate, making the Source more positive than the gate, and the Gate as negative as Vs. Another sub is the BC169, you can even try a bc108/109C. Jan 14, 2012 · However I've just tried a 2N5457 FET in the same 'infinite impedance detector' circuit with clearly cleaner detected audio output compared to the same circuit when using an MPF102. While the circuit has its merits, we decided to further explore it to determine if it was a truly faithful solid-state version of the familiar input stage used May 6, 2013 · CMATMODS Brownie ハイゲイン化 (J201/MPF102⇒2N5457にFET交換） Camuro Custom Built Pedals And Mods 184 subscribers Subscribed Most JFETs are n-channel (rather than p-channel) devices. The 2N5457 is a good candidate that will be somewhat "hotter" than an MPF102. The question is, can we substitute the 2N5457 without adjusting other component values? The answer varies from maybe through probably to absolutely, depending on the requirements of the circuit. My suggestion would be to throw a socket in there and test a few different JFETs to see if it makes any significant difference. 6 days ago · What to substitute for a 2n5458 Started by ambulancevoice, April 20, 2007, 07:37:50 PM Previous topic - Next topic 2N3819 N-Channel JFET Pinout diagram, pin configuration details, Datasheet, Example Circuit, Features and applications Nov 9, 2006 · Good for the beginners. Jan 11, 2014 · Quote I have a bunch of J201s and some 2n5457, 2n5458, MPF102 from previous orders and all of them seem to be in spec when I measure with the ROG methodthe Vishay's from the batch in question are the only ones that show out of spec results. trueAnyone know of replacements for 2N5457, MPF102, or J201 FETs that are used in some example pedal products? Dec 23, 2009 · by elrengofa » 24 Dec 2009, 20:07 for the 2sk30 you can use bf245, mpf102, j201, 2n5457 or many others fets, just check the pinout Jul 3, 2023 · Yes, some similar transistors to the 2N5457 include the J111, MPF102, and NTE312. Detailed comparison of MPF102 and J310, purchase electronic components from Richard Electronics, check latest pricing and stock. Oct 18, 2021 · According to my limited JFET spec comparison spreadsheet, they look like a good substitute for BF245B, BF256B, and MPF102. SPeter Cap Cooler Posts: 553 08 Jan 2008, 22:10 Has thanked: Been thanked: 09 Nov 2009, 20:31 Hi, Jan 6, 2012 · I'm glad I already bought a shitload of J201/2N5457 a couple months back. All rights reserved. It's a buffer here, and the requirements are more forgiving than other applications (hence you can use a 2n5458 or a j201, which are both "out of spec" from a 2n5457 in different directions). Mar 20, 2020 · Looking to build the Glory Hole, and after scouring forums/and websites, a legitimate 2n5457 is pretty hard to find now. x0r 5zo yvstrcj 4qwxod pcdxxq97 1s 0y rwnke tz3bm 1o60cw