Author Topic: 2n5457 substitute  (Read 15890 times)

acehobojoe

2n5457 substitute
« on: January 29, 2015, 12:19:42 PM »
does anyone know of a replacement for a 2n5457? A transistor that has near the same qualities that is a bit more common

fernando jfet

Re: 2n5457 substitute
« Reply #1 on: January 29, 2015, 12:23:50 PM »

midwayfair

Re: 2n5457 substitute
« Reply #2 on: January 29, 2015, 01:38:23 PM »
Well, without knowing what circuit it's in or its application, it's very hard to say. 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).
My band, Midway Fair: www.midwayfair.org. Myself's music and things I make: www.jonpattonmusic.com. DIY pedal demos: www.youtube.com/jonspatton. PCBs of my Bearhug Compressor and Cardinal Harmonic Tremolo are available from http://www.1776Effects.com!

knutolai

Re: 2n5457 substitute
« Reply #3 on: January 29, 2015, 02:49:52 PM »
In JFET boosters and distortions I most commonly see 2N5457 and J201. So for that purpose the J201 might be a interesting alternative.


Frank_NH

Re: 2n5457 substitute
« Reply #5 on: January 29, 2015, 03:50:02 PM »
I have found J202 JFETs to be nearly a drop in replacement for 2N5457s with regard to Vp and Idss (both of which I measure using the Runoffgroove JFET measurement technique as described in their Fetzer article).

midwayfair

My band, Midway Fair: www.midwayfair.org. Myself's music and things I make: www.jonpattonmusic.com. DIY pedal demos: www.youtube.com/jonspatton. PCBs of my Bearhug Compressor and Cardinal Harmonic Tremolo are available from http://www.1776Effects.com!

acehobojoe

Re: 2n5457 substitute
« Reply #7 on: January 29, 2015, 07:00:27 PM »
ok great, I'm just trying to find transistors that can work from a supplier that is close to me. so far, one of them is on their stock list. great :D