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Transitor Identification Help?

S

sixthday

Super Member
Hi, can anyone help me with this transistor?

I am trying to repair an old ECHO box. The delay knob does not have any effects of changing the delay length. This transistor is on the "delay" ( and eventual connects to the Tape Motor) path. There is no schematic available so I have to match the cap/transistor based on the originals.

This transistor's mark says C828 and I assume this is a 2SC828. However, the leads seems different from the information I obtained online for a standard 2SC828 which should have the leads as 1 (E), 2(C), 3(B).

For this transistor, it shorts between 1 and 3 (defective, I assume). But it also shows "OL" between leads 2->1 , 0.59v between 1<-2. And "OL" between 2->3 , 0.59v between 3<-2. So it seems that this transistor has 2 as Base, am I right? Is this still a 2SC828 transistor but having a different leads placement?

Thanks



Repair01.jpg
 
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I have never seen a Matsushita (Panasonic) 2sc828 transistor have the Base in the middle. Base would be either on one side (1), or the other side (3)
Motorola transistors were famous for the base in the middle for small signal transistors, but not this style matsushita
 
The Matsushita Transistor pictured is ECB across the front (your 1,2,3)

Source: Japanese Transistor Data Manual

From the Japanese Substitution Manual of the same year ('92), it is a pretty generic little device and you can use the following:

2SC1570
2SC1815 (KSC1815) about 10cents to buy
2SC945 (really common)
2SC458
2SC2320
2SC1740
 
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