Old transistors in NEW production (including Germanium types) - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 24th April 2016, 09:21 PM   #1
JMFahey is offline JMFahey  Argentina
diyAudio Member
JMFahey's Avatar
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Default Old transistors in NEW production (including Germanium types)

Browsing for datasheets I found this almost unknown amazing Semiconductor Company: Comset.
They seem to have bought some European (Belgium based) Philips plant and keep producing all those mostly obsolete or unavailable transistors.

NEW production, obviously with the same dies and masks , but updated where it counts, I found incredible to find, say, long gone BD130 ... ROHS compliant !!!!!!

They also have Germanium transistors, including small signal PNP and NPN ones, AD162 , AD149, ASZ15, etc.

This is not unreliable/suspect EBay or rusty NOS but the real thing, freshly made by an European Company.

Just check:
Comset Semiconductors Home page

List of products, with datasheets:
Comset Semiconductors Products Page
Liste des Produits Comset Semiconductors

Proof they are a factory and not old stock resellers is that most types can be ordered in commercial quantities, for OEM users; while for mere mortals, meaning service Techs, Hobbyists, etc. , they have a Belgian based online distributor which accepts Paypal:
Electols, The best source for electronics components

with very reasonable prices , such as:
* BD130 ... 2
* 2N3442 ... 1.75
* 2N3773 ... 1.75 now you can repair those old Sunn/Ampeg/Acoustic amplifiers
* AD149 ... 3
* AD162 ... 1.25
* 40411 ... 4
* 2N3054 ... TO66 metallic case ... 1.10 ideal for old VOX amps

a real Time Machine.

They know no new designs will be made using these, they state they cater for the service/replacement market , mainly Industrial machinery (train/Medical/manufacturing controllers/communications/telephony) which must be kept working, not replaced or "improved" so they need the exact same original part.

In any case , a bonus to DIYers who often delve in old/classic equipment

Now "unobtanium" takes a step back
Design/make/service musical stuff in Buenos Aires, Argentina, since 1969.
  Reply With Quote
Old 25th April 2016, 01:29 AM   #2
diyAudio Member
indianajo's Avatar
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
Extremely cool discovery.
No more cutting and splicing boards to make new "better" parts work.
Real TO126 TO18 & TO139 packages.
No more supporting oligarchs in certain infamous countries who treat their workers & neighbors like dirt. The reason I don't buy & throw away new trash daily like my neighbors.
May they live long & prosper right there in the EU. And not be shut down & turned into a 66% correct relabeler like C*****l Semi by bankers.
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300

Last edited by indianajo; 25th April 2016 at 01:35 AM.
  Reply With Quote
Old 25th April 2016, 01:53 AM   #3
kevinkr is offline kevinkr  United States
diyAudio Moderator
kevinkr's Avatar
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
They're fabless so depend on others to make the die for their parts, and probably in at least some cases are packaging die archived against future demand by their former manufacturers. They've been around for quite a while, but are not exactly a household name.. lol I think they are a practical choice for repair parts - but seem expensive for general hobbyist use.

Rochester Electronics in Newburyport, MA has served as a secure repository of die from discontinued semi-conductor product lines for decades now: https://www.rocelec.com/ This would be one potential source of die. (Most U.S. and many Japanese companies use them for coverage of parts that can't go completely obsolete due to contractual obligations)

Aerospace, military contractors, medical and mass transit manufacturers would be typical customers.
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
  Reply With Quote
Old 25th April 2016, 02:57 AM   #4
JMFahey is offline JMFahey  Argentina
diyAudio Member
JMFahey's Avatar
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Well, they seem to source finished transistors from Comset
The online seller company will first sell what they have on stock, then either order more fresh made ones if they seem to sell regularly or plain state "no more available" if it's a *sloooowwww* seller.

In any case, it's an oasis in the middle of the desert.

FWIW I have been involved in servicing medical equipment and in general, a Hospital can spend as much as is needed on existing equipment maintenance, think a defibrillator, a gas-in-blood analyzer, an 80's but still working well CAT scanner (in fact I was scanned myself in an old 80's Marconi scanner after a partial stroke which left my left face and neck paralized ) , because it's considered "normal maintenance" , no need for special authorization, while buying a new one is a complex Political problem, needing a public demand published in newspapers, getting price quotes, approving/voting on one of them, a mess, while "repairing what's already installed" rises no eyebrows.

Plus, contrary to common "hobbyist Audio" custom, on real world critical equipment you keep it working as is , period.

Plus you don't "mess with a winning team" , I have repaired blood analyzers where PH meter depended on miniature pencil tubes , some sections were based on silicon or germanium transistors, and final evaluation and display was made by TTL chips or early microprocessors (think Z80 or 6502) , all on the same device.

When life is at stake, depending on *proven* stuff takes the lead position.

Under those premises, being able to get original parts, even if currently outdated, is a big advantage.

I bet Metro/subway/train controller stuff runs under the same premises, let alone newspaper/magazine printing presses and similar stuff.

In a nutshell, there is still a good market for "obsolete" parts.
Design/make/service musical stuff in Buenos Aires, Argentina, since 1969.
  Reply With Quote
Old 26th April 2016, 07:36 PM   #5
jfetter is offline jfetter  United States
diyAudio Member
jfetter's Avatar
Join Date: Jun 2012
Location: North Houston
�� 2n3773, I used those for everything.
  Reply With Quote
Old 26th April 2016, 08:53 PM   #6
diyAudio Member
Join Date: Sep 2004
Location: South Coast, UK
Me too. Bomb proof - well, almost.
  Reply With Quote
Old 27th April 2016, 09:37 AM   #7
ilimzn is offline ilimzn  Croatia
diyAudio Member
Join Date: Feb 2005
Location: Zagreb
Originally Posted by JMFahey View Post
When life is at stake, depending on *proven* stuff takes the lead position.
Not to mention that approving something for life preserving purposes is a VERY expensive process.

BTW if you need BD130, send me a PM.
  Reply With Quote


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
Germanium transistors for a preamplifier bob123 Analog Line Level 12 6th June 2015 09:15 AM
Germanium Transistors redrooster Solid State 13 22nd October 2014 06:12 PM
Transformers for Germanium transistors moonbird Solid State 30 24th July 2012 10:43 AM
What to do with my germanium transistors keantoken Parts 7 6th April 2008 05:05 AM
List of current production types mashaffer Tubes / Valves 3 15th December 2007 05:20 PM

New To Site? Need Help?

All times are GMT. The time now is 01:43 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2