McIntosh output transistors

paolofuma · 24th January 2008, 09:10 PM

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 · 28th January 2008, 01:00 AM

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 · 29th January 2008, 09:35 PM

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 · 1st February 2008, 04:27 PM

Quote:

Originally posted by paolofuma

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 · 2nd February 2008, 05:27 PM

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 · 5th February 2008, 08:20 PM

OK,

Thank You for the advice.

Paolo

mcintosh amp cloner · 9th March 2010, 11:17 PM

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

thanks.

24th January 2008, 09:10 PM	#1
paolofuma diyAudio Member Join Date: Jan 2008	McIntosh output transistors 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

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28th January 2008, 01:00 AM	#2
hailteflon diyAudio Member Join Date: Sep 2006	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

29th January 2008, 09:35 PM	#3
paolofuma diyAudio Member Join Date: Jan 2008	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

2nd February 2008, 05:27 PM	#5
hailteflon diyAudio Member Join Date: Sep 2006	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.

5th February 2008, 08:20 PM	#6
paolofuma diyAudio Member Join Date: Jan 2008	OK, Thank You for the advice. Paolo

9th March 2010, 11:17 PM	#7
mcintosh amp cloner diyAudio Member Join Date: Mar 2010	hi guys, anyone know which transistor 132-054 is? thanks.

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