McIntosh output transistors

[paolofuma]

Hi all,

I need help for the replacement of transistors in the output stage of McIntosh amplifier MC2105.

The original part numbers are:

132-517
132-518
132-541
132-542

Anyone can help me?
Thank you in advance.

Paolo

 

[hailteflon]

Mac doesn't like people to work on their products.

Just for fun I looked in the NTE crossref.

The last two numbers numbers cross to an NTE130 which appear to be 2N3055. Their complement is MJ2955.

NTE lists 132-515 and 516 but not your 517 and 518.

The 541 is an NTE130 and the 542 is an NTE130MP=matched pair.

Doesn't make a whole lot of sense, but..............................there you go. Mark

 

[paolofuma]

Hi Mark,

I have appreciated your suggestion.

I will start with the equivalent types indicated by NTE trying to find commercial transistors with characteristics very close to those indicated.

Thank you very much.

Paolo

 

[wg_ski]

I will start with the equivalent types indicated by NTE trying to find commercial transistors with characteristics very close to those indicated.

Look at the rest of the threads around here - NTE=bad news. You could try MJ15015 & 15016, which are 180 watt 120 volt versions of the 2N3055 and MJ2955. Speed-wise they seem to be about the same. The die are a little bigger but look the same.

 

[hailteflon]

The warning about NTE is sound advice. Although a rare occurrence in NTE crossovers, the NTE130 is probably actually a 2N3055 because the 3055 is so very common. I should have warned about using a cross-reference. The MJ15015 is shown in the Motorola data book to be an upgrade for the 3055 and the current gain at high output is identical. Same for the PNP.

 

[paolofuma]

OK,

Thank You for the advice.

Paolo

 

[mcintosh amp cloner]

hi guys, anyone know which transistor 132-054 is?

thanks.