Linux Format forums Forum Index Linux Format forums
Help, discussion, magazine feedback and more
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Electronics question

 
Post new topic   Reply to topic    Linux Format forums Forum Index -> Off Topic
View previous topic :: View next topic  
Author Message
emyr42
LXF regular


Joined: Tue Nov 22, 2005 9:16 am
Posts: 147
Location: Cardiff, UK

PostPosted: Thu Apr 26, 2007 10:59 pm    Post subject: Electronics question Reply with quote

My housemate has given me a Transistor he received in a "lucky bag" from an electronics parts supplier. I'm interested in using this transistor to make a cheap audio amplifier.

The writing on the transistor reads:

TFK
9624

and then either

BUX127 VDO

or

BUK127 VDO

We found a datasheet for the BUX127, which said it is a SEME 150W switching transistor;
http://pdf1.alldatasheet.com/datasheet-pdf/view/41903/SEME-LAB/BUX12.html

As far as I can find, the BUK127 is a Philips 1.8W switching transistor.
http://pdf1.alldatasheet.com/datasheet-pdf/view/102181/PHILIPS/BUK127-50GT.html

The item is rectangular and has a 2mm hole through it. It has 3 flat legs. It's about 13mm wide, 16mm tall, and 3mm thick. The middle leg is wider than the other 2.

So, can I use a switching transistor for amplifying audio (given adequate cooling and not running it too hard) and is anyone willing to draw an easy to understand circuit for such an amplifier? Very Happy
_________________
OpenSUSE 10.2, WinXPHome
AMD Sempron 2400, 512MB DDR333, Twin 60GB Deathstars
Back to top
View user's profile Send private message Visit poster's website
Dutch_Master
LXF regular


Joined: Tue Mar 27, 2007 2:49 am
Posts: 2431

PostPosted: Fri Apr 27, 2007 1:14 am    Post subject: RE: Electronics question Reply with quote

No, it's unlikely you'll be able to build a suitable amp with that transistor. First, you'll need more then one transistor to have a decent amplification of the audio signal, especially stereo and second: given your question I doubt you have the knowledge to succesfully build a DIY amp.

There are a few options for you:
# Buy a cheap speaker set for a walkman. Brandnew for about a tenner, 2nd hand for a few quid.
# Use Google to find a suitable circuit, there are plenty out there.
# Learn about electronics yourself. Again: there's much to be found online, but your starting point has to be http://www.elektor-electronics.co.uk/
(hint: there are integrated circuits that do it all for you and do a much better job then you could ever achieve yourself)
Back to top
View user's profile Send private message
emyr42
LXF regular


Joined: Tue Nov 22, 2005 9:16 am
Posts: 147
Location: Cardiff, UK

PostPosted: Fri Apr 27, 2007 2:30 am    Post subject: RE: Electronics question Reply with quote

Righto... so from a theoretical "I might do this anyway one day just to see what happens" p.o.v...

What would a class B push-pull amp circuit built using switching transistors sound like? I imagine it would be good at accurately reproducing square waves!


I've found http://en.wikipedia.org/wiki/Image:Amplifier_Circuit_Small.png and my housemate would probably be able to help me build it, given he's currently making himself a custom fan controller... I had a look at the Elektor site, but the project PDFs required a £1 payment each, so I'll have to keep looking for another good source.
_________________
OpenSUSE 10.2, WinXPHome
AMD Sempron 2400, 512MB DDR333, Twin 60GB Deathstars
Back to top
View user's profile Send private message Visit poster's website
wyliecoyoteuk
LXF regular


Joined: Sun Apr 10, 2005 11:41 pm
Posts: 3445
Location: Birmingham, UK

PostPosted: Mon Apr 30, 2007 11:38 am    Post subject: RE: Electronics question Reply with quote

http://www.babanibooks.com/bb7.htm

These books have been around for years, (I remeber building projects from them over 30 yrs ago).
They were always interesting.
You might get them even cheaper on ebay! (actually not, I just looked.
_________________
The sig between the asterisks is so cool that only REALLY COOL people can even see it!

*************** ************
Back to top
View user's profile Send private message
View previous topic :: View next topic  
Display posts from previous:   
Post new topic   Reply to topic    Linux Format forums Forum Index -> Off Topic All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Linux Format forums topic RSS feed 


Powered by phpBB © 2001, 2005 phpBB Group


Copyright 2011 Future Publishing, all rights reserved.


Web hosting by UKFast