All Hitachi Lateral Fet amplifier for DIY described by Paul Kemble - Page 37 - 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 12th January 2013, 05:34 PM   #361
diyAudio Member
 
Join Date: Sep 2005
Hello
I'm just drilling my PC boards now.
I will build it that sure, it will take a while until I collect the missing parts. I want to use min. DALE resistors and other exotic parts.
I have to order them and with the same order I will order parts for other project to.
Greetings Gabor
  Reply With Quote
Old 12th January 2013, 07:10 PM   #362
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
Beauty of a pcb, what kind of pcb software did you use? my ultiboard is a kind of crap if I see this. clever made, but much fets paralell will oscillate, maybe with the modern mosfets it is not so much a issiue but it distroy the tweeters in a flash, but you now that afcourse also.

thanks.
  Reply With Quote
Old 12th January 2013, 07:44 PM   #363
Telstar is offline Telstar  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: Italy
Gabor, if you perhaps order from digikey, drop me a pm.
__________________
"The total harmonic distortion is not a measure of the degree of distastefulness to the listener and it is recommended that its use should be discontinued." D. Masa, 1938
  Reply With Quote
Old 1st March 2013, 02:12 AM   #364
diyAudio Member
 
Join Date: Sep 2005
Hello

I did started the PC boards stuffing, it took me a while because I needed to select the left over resisters from another projects.
Also I ordered the Toshiba 2SA1360/2SC3423 bipolar from Europe. I still need few resister, the diodes and trimmers.
I hope in March I will start to test the amp.
Slowly but soon I be there so I can report the result for those who interested on these project.

Greetings Gabor
Attached Images
File Type: jpg Picture 018.jpg (65.2 KB, 246 views)
File Type: jpg Picture 019.jpg (75.6 KB, 243 views)
  Reply With Quote
Old 1st March 2013, 05:07 AM   #365
wahab is offline wahab  Algeria
diyAudio Member
 
Join Date: Nov 2009
Location: algeria/france
Hi Gabor ,

Great to see that this amp is going its way.

As pointed , no need of costly passive components , provided
they are of good quality there wont be any difference compared
to exotic brands.

The transistors are the real sound shapers but not all have the same
importance , the most criticals are the 2SA992/2SC1845 wich can be
valuably replaced by BC560C/550C as well as the 2SC3423 that is used
in the side of the current mirror that drive the lateral Pfets.

If you have trouble finding some of the small signal transistors or if they
are excessively expensive just post about it , i ll provide a list of replacements
that should yield the expected perfs.
  Reply With Quote
Old 1st March 2013, 05:34 AM   #366
diyAudio Member
 
Join Date: Sep 2005
Thank you Wahab
Just to be clear I do not have 2SC1845 in the circuit or that is a mistake?
Right what I do not have and needed the 2SA992 but I didn't check the local store yet.
I'll go soon when the weather will be better because I need the diodes, some clad board etc.
In case if I do not get I will ask some quality replacement all do I have some Hitachi 2SB716 and complementary.
I think has same pin out.. if That is OK.
Greetings G
Attached Images
File Type: gif HITACHI%20FFET%20MOD5_5%20SCH.gif (20.5 KB, 232 views)
  Reply With Quote
Old 1st March 2013, 06:42 AM   #367
wahab is offline wahab  Algeria
diyAudio Member
 
Join Date: Nov 2009
Location: algeria/france
My bad , there s no 2SC1845...

Ok, a first possible cheap replacements :

Q3/Q4/Q9 can be 2N5551 if from reputable manufacturer.

Q11 can be BF469/471 if they are from Phillips/NXP or eventualy
a renowed brand as Fairchild but second rates manufacturers are
to be discarded.

Q5/Q6 can be 2SA872/BC560C/BC416C.

Q10 is extremely important and the 2SC3423 is to be used preferably ,
there s not other devices that are possible and easily available.

I see that you have populated Q18/Q19 , these can be whatever
small signal transistors.

The 2SB716 are exceptionnal devices and should be spared
to be used where their huge gain can be advantageous.

Last edited by wahab; 1st March 2013 at 06:44 AM.
  Reply With Quote
Old 1st March 2013, 10:48 AM   #368
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
I have did this one, I go test it soon, first the loudspeaker projects.

simple amp, low distortion and current feedback.

it just miss a offset servo this is just a simple add on.
Attached Images
File Type: jpg singleended fet amp.jpg (468.8 KB, 208 views)
  Reply With Quote
Old 1st March 2013, 03:54 PM   #369
naf is offline naf  Indonesia
diyAudio Member
 
Join Date: Aug 2011
Hi Wahab, how about 2sc3953/sc2911 on Q10?
  Reply With Quote
Old 1st March 2013, 05:04 PM   #370
diyAudio Member
 
Join Date: Sep 2005
Hello
For Q5 & Q6 I have at home a lot of Hitachi 2SA872A E grade Hfe400-450...
I do not have almost any use of them since the complementary unavaleble.. I will used here.
For the other BJT I did ordered 16 pair 2SA1360Y & 2SC3423Y Toshiba.
The 16 pair must be enough for these project.
I have some Toshiba 2SA1930 & 2SC5171 at hand, may be I can use (in case for cascode) Q3/Q4 if the 16 pair would be not enough because the matching..
Greetings Gabor
  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
Lateral MOSFET replacements for 2SK1058 (Hitachi) jgwinner Solid State 26 12th June 2014 07:33 PM
Midgard, a low distortion Lateral FET output Headphone Amplifier Neutrality Headphone Systems 8 14th December 2012 07:31 PM
Thor, an all discrete Lateral FET Headphone Amplifier. Neutrality Headphone Systems 163 5th November 2012 02:53 PM
Mjølner, another all discrete Lateral FET Headphone Amplifier Neutrality Headphone Systems 13 13th October 2012 07:42 PM
hitachi lateral power mosfet in pspice JBnl Solid State 2 12th March 2005 04:49 PM


New To Site? Need Help?

All times are GMT. The time now is 05:40 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