BD139-16 & BD140-16? Anyone use these transistors? - Page 4 - diyAudio
Go Back   Home > Forums > Design & Build > Parts

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
Reply
 
Thread Tools Search this Thread
Old 16th June 2007, 11:56 AM   #31
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Cool BD139 BD140 BUX39 - close up

.
here a close up

The pair, is a 'matched complementary' pair BD139 BD140
.. with my test figures on a paper attached with piece of wire.

Also can see some simple home made heatsinks
I use sometimes just in case.
I have bigger heatsinks for TO-126 TO-220 for 'hotter bias' applications, approaching temperture limit


Regards lineup
Attached Images
File Type: jpg 688_1a-1_80.jpg (96.0 KB, 857 views)
__________________
lineup
  Reply With Quote
Old 16th June 2007, 12:08 PM   #32
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Default BUX39 and 200V


I still have a couple of those TO-3 big BUX39 left.
I bought 10 of them from a surplus sale, for almost nothing.
They are good for some heavier Currents non-Audio-amplifier things.

Those 2 caps are Polypropylene Axial:
marked: ERO KP1832, 200V=, 5%, 0.43uF

In upper right is a capture from A slaughter of old Transformator.
Enamelled copper wire is good for many things ....
in my little corner of my room company:
LIneup Audio Lab >>>> .. like 4 square meter. ( 2m x 2m )

But dont you go fool your selves, too much
- plenty of small goodies is too be found inside that little limited space of my life

Image #3 - my last for today.
Attached Images
File Type: jpg 678_1a-080.jpg (78.2 KB, 740 views)
__________________
lineup
  Reply With Quote
Old 18th June 2007, 06:58 AM   #33
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Default Re: Thanks for all the suggestions!

Quote:
Originally posted by grhughes
I've never used SMT devices. I guess they have to lay flat??
That's the whole idea behind surface mounted parts. Cooling SMT devices requires some considerations about the pcb.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy. Still time for signing up.
  Reply With Quote
Old 11th February 2008, 08:18 AM   #34
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally posted by jacco vermeulen
Back in the old days you had to open a semiconductor book to look at a datasheet, instead of clicking a pdf.
Of course, the semiconductor data book comes free if you've got a relative employed at the Philips NatLab in Eindhoven.
Free online datasheets often are abbreviated versions, sometimes saves you 10 to 14 pages.

A bunch of BD139/140s in parallel make a fantastic class A headphone amp output stage.
Philips versions are much nicer, Cob of 5.7pF, downside that the power they handle is 2/3d of the different die version.
Hello

Where did you find the Cob spec of the BD139 ?

I've never seen it in all versions of data sheets that I have.

Thank

Bye

Gaetan
  Reply With Quote
Old 28th April 2010, 02:05 PM   #35
diyAudio Member
 
Join Date: Jun 2007
Do these ones look like genuine Philips units?
Attached Images
File Type: jpg 139140.jpg (16.4 KB, 467 views)
  Reply With Quote
Old 28th April 2010, 02:21 PM   #36
sbrook is offline sbrook  Canada
diyAudio Member
 
Join Date: Feb 2007
Location: Ottawa Canada
They don't look like mine ... which were manufacted by Philips about 25 - 30 years ago ...

The ones I have have the printing of the type number on the bottom row closest to the pins ... not the next row up, like these. The three moulding dots are located close to the through hole, the edge is under 1 mm away, unlike these that have the moulding dots almost in the upper corners of the body.
  Reply With Quote
Old 30th January 2013, 07:02 PM   #37
diyAudio Member
 
terranigma's Avatar
 
Join Date: Feb 2007
Quote:
Originally Posted by x-pro View Post
On top of what already was written by jacco, I would add that it is possible to check the capacitances of the device if you have a capacitance meter. If my memory serves me right, Philips BD140 would have B-C capacitance about 50-60pF at 0V, and ST etc. - about 100-120 pF. In any case the capacitances on BC640 and Philips BD140 (and their NPN complements BC639/BD139) are near identical.

x-pro

I just measured CoB capacitance of some BD's that I have at 0V for comparison.

ST BD139 50pF
No brand BD139 (PH402) 102pF
Philips BD139 30pF

Philips BD137 32pF
Harris BD137 22pF
No Brand (PH99) BD137 52pF

Philips BD140 52pF
Harris BD140 35pF

I find almost nothing about those Harris devices at internet. I look forward to find some info about their specs, especially Ft.
  Reply With Quote
Old 30th January 2013, 08:04 PM   #38
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
no mention of original Motorola ?

I have a few with greyish house and gold legs
but they have been pulled from burned amp many years ago, so I will need to check them
  Reply With Quote
Old 31st January 2013, 07:57 PM   #39
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
UPS!
I had not noticed this is a reopened older thread

but whatever, I measured my old Motorola BD139/140
not that I know much about how, but with diode function on my multimeter, I read 900...something
from one leg to other two, on all the shown devices

so I guess they are all ok ?
Attached Images
File Type: jpg IMG_8408.JPG (182.5 KB, 197 views)
  Reply With Quote
Old 31st January 2013, 09:56 PM   #40
diyAudio Member
 
terranigma's Avatar
 
Join Date: Feb 2007
You must have a capacitance meter which able to measure in picofarads. You have to measure 2nd leg (Collector) and 3rd leg (Base) with capacitance meter for comparison.

If you want to know your transistors are working or not, just measure their HfE using a suitable multimeter. Many multimeters contain this feature rather than capacitance measurement.
  Reply With Quote

Reply


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
BD139/140 driver Rafael L Solid State 27 15th January 2014 01:09 PM
Former DDR SD339 and SD340 (BD139-140) antomas Parts 0 20th April 2009 09:02 PM
First discrete amp, Need help with NTE 390, 391, 375, 398, and BD140, 139 project danielwritesbac Solid State 670 11th March 2009 04:20 AM
BD139/140 Overvoltage B.I.G Solid State 17 22nd July 2005 09:12 AM
bd140 PIN LAYOUT MaXiZ Parts 4 1st April 2005 02:25 AM


New To Site? Need Help?

All times are GMT. The time now is 11:26 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2