Your Favorite Signal, Driver & Power Transistor used in your Amp and Why? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 1st August 2005, 10:55 PM   #1
diyAudio Member
 
John Biles's Avatar
 
Join Date: May 2005
Location: Victoria Australia
Question Your Favorite Signal, Driver & Power Transistor used in your Amp and Why?

Hello Everyone,
If this Question has been asked before can you please let me know where the link is.
My question is with all the Amplifiers that have been built by Members on this forum, you all must have a favorite Signal, Driver Power transistor that you continue to use because it's reliable, gives for your Amplifier the best sound.
There must also be some disappointing Transistors out there as well, that you wouldn't used again.

I would like to know so that i can test these transistors in my design.
  Reply With Quote
Old 2nd August 2005, 01:25 AM   #2
tlf9999 is offline tlf9999  United States
Account Disabled
 
Join Date: May 2005
Location: none
Signal: 2n5401/5551 - have plenty of them. realiable and get the job done just fine.
Driver: 15030/31 - have plenty of them. reliable and get the job done just fine. I also use to220 MOSFETs ocassionally.
Power: usually some power MOSFETs. today's favorite is FQA19N20.
  Reply With Quote
Old 2nd August 2005, 02:38 AM   #3
diyAudio Member
 
John Biles's Avatar
 
Join Date: May 2005
Location: Victoria Australia
Thanks tlf9999,
I will download the datasheets on those ones and check their specs, Thanks
  Reply With Quote
Old 2nd August 2005, 12:05 PM   #4
edl is offline edl  Hungary
diyAudio Member
 
edl's Avatar
 
Join Date: Oct 2004
Signal:
-bc546/556 (bc212/182): cheap, realiable. good for max. 60V rails
-2n4401/5551: higher Uceo

Medium:
-bd139/140: cheap, realiable. good for max. 40V rails
-mje340/350: very high Uceo

Driver:
-bd239c/240c - bd241c/242c - bd243c/244c: these are old, "slow" devices, but they are so cheap, and do the job well with lower (max. 40-50V) rails.
-mje15030/15031: one of the best drivers

Power:
-2sc5200/2sa1943: good price, fast, easy to mount
-mj15003/15004: very hard to kill, greeat SOA. for rails up to +/70V.
-mj15022/mj15023 - mj15024-mj15025: they are excellent for high power amps, for high rails (+/-100V)
-mj15015/mj15016: I'm using two pairs for 200W PA amps. cheap devices.
-bd911/912 - bd249c/250c: good old devices for little amps.

Be careful, there are a lot of fake power transistors in the shops!
  Reply With Quote
Old 2nd August 2005, 01:22 PM   #5
diyAudio Member
 
John Biles's Avatar
 
Join Date: May 2005
Location: Victoria Australia
Thankyou edl,
This is the type of info I am looking for, thankyou for taking the time to supply this info.
I will be downloading the datasheets on all the transistors you have listed, Thankyou Again!
  Reply With Quote
Old 2nd August 2005, 01:56 PM   #6
MikeB is offline MikeB  Germany
diyAudio Member
 
MikeB's Avatar
 
Join Date: Apr 2004
Location: GŁtersloh
Additionaly for smallsignal i like mpsa18 in the inputstage.
For Powerbjt i also like the mjl3281/1302/21193/21194/21195/21196.
With the rest i go conform with edl.
  Reply With Quote
Old 2nd August 2005, 02:23 PM   #7
Mr Evil is offline Mr Evil  United Kingdom
diyAudio Member
 
Join Date: Aug 2004
Location: Behind you
Signal:
BC550C/BC560C - Low noise, high gain, quite fast.
2SK389/2SJ109 - Dual JFETs, low noise.

Driver/medium power:
D44H/D45H - Fast and high gain, you won't see many better than this.

Power:
Exicon MOSFETs - I stay away from those horrible BJT things!
__________________
https://mrevil.asvachin.eu/
  Reply With Quote
Old 2nd August 2005, 03:27 PM   #8
bocka is offline bocka  Germany
diyAudio Member
 
Join Date: Jul 2003
Location: Hannover
Quote:
My question is with all the Amplifiers that have been built by Members on this forum, you all must have a favorite Signal, Driver Power transistor that you continue to use because it's reliable, gives for your Amplifier the best sound.
This is mainly a quastion of your topology not only of the devices used. You can make a good as well as a mediocre amp with all the devices listed above. A transistor must fit your design criteria first. After choosing your favored device you should change parts and listen if they sound better. It's impossible to say that transistor A sounds better than transistor B or vice versa.

The only statement that can be given is that device A or can handle your desired output power, voltage, speed... or not. Or that the ß is sufficiant, has a low/high input/reverse/output capacitance and so on.

Yes, I've also prefered devices, because I've a lot of them.

Small signal

2SK389/2SJ109
ZTX450/ZTX550
2N5401/2N5551

Medium Power

MJE15034 / MJE15035
2SA1930/2SC5171

Power

MJL1302/MJL3281
2SA1943/2SC5200

A lot of devices for enough permutations. Maybe you can do something uncommon like using MJL1302 and 2SC5200 in your output stage?
  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
Favorite High Power Output Transistor mashaffer Solid State 520 21st July 2010 12:52 PM
Class A SE power and driver transistor choice for stability and performance ionomolo Solid State 3 16th February 2009 09:09 PM
Favorite size wire for signal wiring? G Tubes / Valves 8 12th February 2009 05:19 PM
Favorite Driver for 845 Bryan Tubes / Valves 4 29th October 2005 07:53 AM


New To Site? Need Help?

All times are GMT. The time now is 04:28 AM.


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