Unknown transistor - Help !!!

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aldovan

Member
Joined 2005
Dear friends

I have a old radio with a unknown damaged transistor.
The transistor have the motorola logo and is write "8113 STASIS PNP" in the package TO-3.
I need change this transistor. Anyone known this motorola code and can identify this transistor ?

Thanks,

Aldovan
:bigeyes:
 
G

gmphadte

Member
Joined 2003
If it is a transistorized radio, then u may have same transistor in other stage(s). Check if the transistor is Ge or Si, then replace with any modern transistor of similar size and type(RF or AF). U will not damage anything. Install the pins properly.

Gajanan Phadte
 
anatech

anatech

Administrator
Joined 2004
Paid Member
Hi djk,
Sounds like a Threshold amp to me.
Click to expand...
I was about to say that! :cool:
Use MJ15025 for PNP, and MJ15024 for NPN.
Click to expand...
Yup. Nelson may have some insights on that. I wonder if he ever took this design further?
Do not even think about replacing one output, replace them all.
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Absolutely!

You left me darn near nothing to say here djk! ;)

-Chris
 
M

m2003br

Member
Joined 2004
Aldovan,

Are you testing properly this germanium transistors?

Junction voltages is about 0.1 to 0.2V, gain is low and lots of leakage is the norm...and not mean a defective component.
If you have only one TO-3, its a "A Class" output, steady state current was about 1 to 2 Amperes.

Marcos
 
anatech

anatech

Administrator
Joined 2004
Paid Member
Hi m2003br,
Aldovan says: "I have a old radio with a unknown damaged transistor"
It has nothing about Threshold amps...
Click to expand...
Well, this is interesting
The transistor have the motorola logo and is write "8113 STASIS PNP" in the package TO-3.
Click to expand...

We were hoping Aldovan would then give us the make and model of the radio. Since this is still a mystery, no comment can be made by anyone. Agreed?
Are you testing properly this germanium transistors?
Click to expand...
Now, either you have information that no one else in this thread has or you just jumped to a conclusion.

Would you care to share Marcos?

-Chris
 
M

m2003br

Member
Joined 2004
Hi Anatech,

Aldovan have another recent topic in diyAudio, where he asked for especifications for an old germanium TO-3 transistor, 2N176
and, all in all, old Motorola radios don't have anything with Threshold amps, and, from my best knowledge, all of this radios (existing in Brazil, at least) have germanium output transistors.

Marcos
 
poynton

poynton

Member
Joined 2005
aldovan said:
Dear friends

I have a old radio with a unknown damaged transistor.
The transistor have the motorola logo and is write "8113 STASIS PNP" in the package TO-3.
I need change this transistor. Anyone known this motorola code and can identify this transistor ?

Thanks,

Aldovan
:bigeyes:
Click to expand...

Hi.
If it is an old Motorola car radio with a single output transistor

any of the following can be substituted :-

OC35
OC28
2N176

Look on EBAY.

The 2N176 was the'original' car radio output transistor !!

See :- http://semiconductormuseum.com/PhotoGallery/PhotoGallery_Motorola_2N176.htm


Good luck

Andy


EDIT :- How many do you want ?

http://cgi.ebay.com/184-RARE-MOTORL...-TO-3-PNP_W0QQitemZ130145444142QQcmdZViewItem
 
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