RCA 3626 power transistor from Crown amp

[delapoer]

I am trying to find a source of RCA 3626 power transistors to replace dead ones in a Crown DC300A power amp. Alternatively an equivalent would be good - does anyone know where I can get them?

 

[imix500]

Have you called Crown? They have an excellent service and parts dept. If you hit a dead end I might be able to get my hands on a few.

 

[delapoer]

No, I haven't tried Crown because I can't find the address of the UK agent for Crown - good idea though!

 

[delapoer]

I have found out that the transistor is actually an RCA 1B05 despite reading 3626 on the can!

 

[Centauri]

1B05 is a very obslete transistor - recommended replacement is the MJ15024.

But don't mix these with old ones - replace the whole set.

Cheers

 

[delapoer]

Thanks a lot for the information. What is the problem with mixing the types?

 

[Centauri]

Two reasons:

Different specifications will mean they don't share the load current evenly, and

If some of the transistors are faulty, then it can be assumed that the resultant surge when this occurred has put undue stress on the remaining units. Therefore thay are more prone to premature failure (meaning the set should be replaced even if the same type is used).

Cheers