Wow... what a question. What do you mean by that?
Considering low noise: BC550, BC556, BC549B, BC109B, BC547B, BC179, BC477, BC177.
To make a final choice you will need to consult the tables of technical data which are normally provided in catalogues. I suggest this site:
http://www.im.pwr.wroc.pl/~med/jn/karty_katalogowe.html
.pdf files provides information you need.
Peace!
TH.J.B
Considering low noise: BC550, BC556, BC549B, BC109B, BC547B, BC179, BC477, BC177.
To make a final choice you will need to consult the tables of technical data which are normally provided in catalogues. I suggest this site:
http://www.im.pwr.wroc.pl/~med/jn/karty_katalogowe.html
.pdf files provides information you need.
Peace!
TH.J.B
TH.J.B said:
Considering low noise: BC550, BC556, BC549B, BC109B, BC547B, BC179, BC477, BC177.
Only none of these are germanium.
Germanium Power Transistors
if you are looking for
germanium power transistors ( >= 1 Ampere )
it is not many complementary pairs PNP + NPN
There are however some powerful devices.
I have found one guy selling NEW EXEMPLARS in Original Package of these:
> 2N268 .. PNP .. 80Volt 3Ampere 30Watt .. looks almost like TO-3
> OC16 .. probably PNP ...in older power case
They do NOT come cheap
Complementary Pairs. Often used are:
--------------------------------------
AC127 + AC128 0.3 / 1 Watt
AC187 + AC188 1 / 1 Watt
So
AC187 (npn) + AC188 (pnp) are one of the few Pairs above 1 Watt
See attached picture of 2N268, 30 Watt PNP
if you are looking for
germanium power transistors ( >= 1 Ampere )
it is not many complementary pairs PNP + NPN
There are however some powerful devices.
I have found one guy selling NEW EXEMPLARS in Original Package of these:
> 2N268 .. PNP .. 80Volt 3Ampere 30Watt .. looks almost like TO-3
> OC16 .. probably PNP ...in older power case
They do NOT come cheap
Complementary Pairs. Often used are:
--------------------------------------
AC127 + AC128 0.3 / 1 Watt
AC187 + AC188 1 / 1 Watt
So
AC187 (npn) + AC188 (pnp) are one of the few Pairs above 1 Watt
See attached picture of 2N268, 30 Watt PNP
Attachments
Germanium Transistor List
There are lists with DATA specifications
of some Germanium transistors.
I will put together one PDF or ZIP file, later.
OC16 .. I mentioned is: PNP, 32V 1.5A 6.25Watt
By the way, in
Solid State forum
if you post germanium question there
you will probably get a lot more info from
Older Electronics Repair Service members.
We have quite a few of those at www.diyaudio.com I know
Enjoy
Lineup
Germanium Transistor History & Info forum
There are lists with DATA specifications
of some Germanium transistors.
I will put together one PDF or ZIP file, later.
OC16 .. I mentioned is: PNP, 32V 1.5A 6.25Watt
By the way, in
Solid State forum
if you post germanium question there
you will probably get a lot more info from
Older Electronics Repair Service members.
We have quite a few of those at www.diyaudio.com I know
Enjoy
Lineup
Germanium Transistor History & Info forum
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