2N3055 inside - commercial famous amplifier models, quasi complementary power output - Page 16 - 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 6th November 2012, 01:51 PM   #151
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by tiefbassuebertr View Post
the magazines from post #5, 7 and 15 about
Overview from world's best historical and currently available electr/audio Magazines
there must actually be such advertisements between 1961 and 1964.
Nobody can check out this for me?
  Reply With Quote
Old 6th November 2012, 09:16 PM   #152
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
My company closed their library that had 500,000+ items in the 621 section (electrical engineering). I did some dumpster diving but didn't get but a fraction of what I would have wanted.
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 8th November 2012, 10:25 AM   #153
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by djk View Post
My company closed their library that had 500,000+ items in the 621 section (electrical engineering). I did some dumpster diving but didn't get but a fraction of what I would have wanted.
Most high school libraries would be very happy, if they received such paper material.
  Reply With Quote
Old 8th November 2012, 11:57 AM   #154
diyAudio Member
 
Zero Cool's Avatar
 
Join Date: Sep 2004
Location: MN
I thought the Acoustic 370's used the 3055H a higher voltage device with internal emitter resistor?? and most people replace them with the 3055 and that's why no one can get one to work after a failure.
__________________
It's not about what you can BUY...It's about what you can BUILD!
  Reply With Quote
Old 8th November 2012, 02:03 PM   #155
banat is offline banat  Serbia
diyAudio Member
 
Join Date: Dec 2009
Location: near Belgrade
Tiefbass here some pictures from my modest vintage SS stash :

Picture 1 ) Motorola 2n3055 , 5pcs , they all come to me from discarded very old EI NIS B10 color CRT TV which date from early or mid of 70 ` , they serve there as output power Tranz. in Vertical deflection unit driving deflection Yoke .
First from left is very old Toshiba 2N3055 , from same source , very massive one , with twice of Motorola weight , and with very thick pure CU bottom plate .
And top one is example of very old SE3055 from Hong Kong , they work as charm .

Picture 2 , is vintage Motorola 2N3773 , several very old but OK pcs.

And picture 3 , two very old Tesla KD503 in comparison with Motorola 2N3773 where is obvious that Tesla have perfect copied Motorola , 100% same shape ,100% same case material , but more powerful than 3773 , second difference is that Tesla used much thicker device pins plated with gold .

Best Regards !
Attached Images
File Type: jpg Fotografija 0038.jpg (143.0 KB, 447 views)
File Type: jpg Fotografija 0039.jpg (151.6 KB, 432 views)
File Type: jpg Fotografija 0040.jpg (118.0 KB, 428 views)
  Reply With Quote
Old 10th November 2012, 02:39 PM   #156
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Quote:
the 3055H a higher voltage device
The H means Hometaxial, a much more robust construction than standard (cheaper) Epitaxial, which "regular" 2N3055 use.
That, coupled to the fake transistor pandemia is the real cause of repair problems.
They should be replaced by MJ1502x transistors or MJ1500x ones or MJ2119x types.
Way beyond what's needed, but that is never bad
And parts cost is still reasonable.
2N3055H were not "higher voltage" per factory spec, but "higher SOAR", the safe area.
Of course, among them, some higher voltage ones could be hand picked.
  Reply With Quote
Old 10th November 2012, 05:58 PM   #157
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
I suggest using the MJ15015 to replace any of the 2N3055 versions.

They are hand selected to meet 120V and 60V/3A SOA and are shown with the same curve graphs as the 2N3055.

http://www.datasheetcatalog.org/data...la/MJ15016.pdf
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 10th November 2012, 08:27 PM   #158
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by banat View Post
Tiefbass here some pictures from my modest vintage SS stash :

Picture 1 ) Motorola 2n3055 , 5pcs , they all come to me from discarded very old EI NIS B10 color CRT TV which date from early or mid of 70 ` , they serve there as output power Tranz. in Vertical deflection unit driving deflection Yoke .
First from left is very old Toshiba 2N3055 , from same source , very massive one , with twice of Motorola weight , and with very thick pure CU bottom plate .
And top one is example of very old SE3055 from Hong Kong , they work as charm .

Picture 2 , is vintage Motorola 2N3773 , several very old but OK pcs.

And picture 3 , two very old Tesla KD503 in comparison with Motorola 2N3773 where is obvious that Tesla have perfect copied Motorola , 100% same shape ,100% same case material , but more powerful than 3773 , second difference is that Tesla used much thicker device pins plated with gold .

Best Regards !
Thank you for this pictures. Are there genuine data sheets or data books from TESLA's power devices in TO-3 outline ?
an other question: Which historical (vintage) and currently available electronic magazines in your country there was exist and is currently available ?
Please let me know any examples by this topic:
Overview from world's best historical and currently available electr/audio Magazines

thank you very much in advance.

Quote:
Originally Posted by john_ellis View Post
Hi all

Yes, I was once shown an advert for a 2N3055 by RCA in the mid-1960's. I would like to track that down too. It showed the three devices introduced by RCA together - the 2N3053, the 2N3054 and 2N3055 in their packages (TO-5, TO-66, TO-3).

I have not come across any patents by RCA for the 2N3055 specifically.

ON Semi transistors can do the same SOAR (more or less at least for D.C.) - for example, MJ15003 (1A/100V (close to the 2N3773)) or better, the MJ21194 (1.5A/100V=match).

John
perhaps by this history report in danish language are additional details to find - go to
Aktuel Elektronik Nr. 10 (2008) Page 24
An other interest URL is here:
http://n4trb.com/AmateurRadio/RCA_Ha...amtips2701.pdf
http://www.ebay.com/itm/GE-Ham-News-...-/110954943697
http://n4trb.com/AmateurRadio/RCA_Ha...a_ham_tips.htm
Here must actually be an advertisement concerning the 2N3055.

Last edited by tiefbassuebertr; 10th November 2012 at 08:52 PM.
  Reply With Quote
Old 10th November 2012, 10:52 PM   #159
banat is offline banat  Serbia
diyAudio Member
 
Join Date: Dec 2009
Location: near Belgrade
Tiefbass

Here is document with that vintage Tesla SS parameters for you :

Must check for that old electronics magazines , they exist here for sure , but I need some time to recheck all that !

BTW , I support all your efforts & work here on this BIG DIY Audio site !!!

Best Regards !
Attached Images
File Type: gif Tesla SS.gif (129.6 KB, 323 views)
File Type: jpg Tesal SS2.jpg (179.0 KB, 309 views)
  Reply With Quote
Old 11th November 2012, 02:10 PM   #160
diyAudio Member
 
Join Date: Sep 2006
Hi tiefbassuebertr,
Looked through several RCA HamTips and only the power supply mentioning 2N3053-2N3054-2N3055 refers to those transistors! And then it says "recently introduced", so we are looking for an advert around 1964 or possibly early 1965.


Have to keep looking.

John
  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
quasi-complementary output Vlad Pass Labs 4 13th April 2010 01:07 PM
Clone kits of famous power amplifier partner11 Solid State 0 3rd December 2009 06:49 AM
Quasi-complementary Output Stage question. Tequilataz Solid State 14 25th September 2009 02:40 PM
Single supply quasi complementary mosfet power amp slideman82 Solid State 8 7th March 2009 01:25 AM
(Quasi)complementary JFET power amplfier R-K Rønningstad Pass Labs 21 15th July 2007 07:21 PM


New To Site? Need Help?

All times are GMT. The time now is 04:34 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