JFET Identification - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 3rd February 2012, 05:54 AM   #1
diyAudio Member
Join Date: May 2005
Location: Santa Clara, CA USA
Default JFET Identification

I'm trying to repair a C-J preamp damaged by ESD. I cannot identify one of the damaged JFETs marked "CAL JF 1182B" ("CAL" I believe is Calogic.) The device is paired with a CAL J177 which is a Calogic P-channel FET - so the device in question is the complementary N-channel device. But I cannot find any reference to this device online, although the J177 is readily available.

I'd appreciate any help.

  Reply With Quote
Old 3rd February 2012, 06:21 AM   #2
EUVL is offline EUVL  Europe
diyAudio Member
Join Date: Oct 2003
The closest complementary to J177 is J113, also available from Calogic, among others.

  Reply With Quote
Old 4th February 2012, 06:45 AM   #3
diyAudio Member
Join Date: May 2005
Location: Santa Clara, CA USA
Yes, the characteristics of the J113 seem close to what the circuit was designed for. I will give these a try. But if anyone knows exactly what device the markings correspond to I'd like to know.

Thanks very much.

  Reply With Quote
Old 4th February 2012, 07:21 AM   #4
osscar is offline osscar  Latvia
diyAudio Member
osscar's Avatar
Join Date: May 2009
Location: Riga, LV
Do not forget that different manufacturers have different pin-out for j113!


My DIY : http://www.tutribi.net
  Reply With Quote
Old 6th August 2015, 02:22 PM   #5
win33 is offline win33  Indonesia
diyAudio Member
Join Date: Oct 2006
Can I change j177 & j113 with 2sk170 & 2sj74 ?
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Complementary JFET-JFET cascode input, BJT VAS-Drivers, Lateral Output Neutrality Solid State 61 2nd October 2015 06:35 AM
FS: PreAmp with Complimentary JFET Diff input & JFET ouput USAcircuits Vendor's Bazaar 12 21st June 2011 11:02 AM
Need identification if possible. es44 Full Range 2 11th September 2008 08:38 AM
Vreg identification Ryssen Power Supplies 27 20th February 2008 09:56 AM
Can I replace BF245C JFET with J201 JFET? bigmike216 Parts 2 7th December 2005 06:50 AM

New To Site? Need Help?

All times are GMT. The time now is 10:37 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2