|
|
|
|
|||||||
| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
 |
|
|
Thread Tools |
14th May 2017, 10:06 pm
|
#21 |
|
Dekatron
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,203
|
Re: Sorting AF11X transistors
Could very well be, I've seen more than once that bought in semiconductors were stamped Sony. They had some IC's made by Fujitsu, for example. Clearly identifiable by the features of the case and date stamps.
|
|
|
14th May 2017, 10:23 pm
|
#22 | |
|
Nonode
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,580
|
Re: Sorting AF11X transistors
Quote:
The transistor on the bottom right has a 3N4 code on it which looks to be the type of code that Philips/Mullard used on their semiconductors. It also looks to be the same font as well. Something else I was thinking about regarding tin whiskers was, does this affect the Japanese germanium audio transistors with the same case as the European AC128 transistors? Regards Symon. Last edited by Philips210; 14th May 2017 at 10:26 pm. Reason: additional text |
|
|
|
|
14th May 2017, 11:18 pm
|
#23 |
|
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,970
|
Re: Sorting AF11X transistors
I've not heard of problems with Japanese audio types, but the problems with AC128s have only emerged in the last few years, so who knows?
|
|
|
|
15th May 2017, 3:28 am
|
#24 |
|
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
|
Re: Sorting AF11X transistors
The 3N4 transistor is a Mullard that slipped through the sorting process done for the photo. The one with the red sleeve is also a Mullard number.
|
|
|
