SAE mk XXX1B transistor sub

ostie01 · 11th June 2006, 01:57 AM

HI, just mistype my last thread. Would like good sub transistors for the power amp SAE mk XXX1B. Service manual ask for SAE 103 and SAE 204. Number mark on transistor installed in the amp right now are 11-0064A and 11-0070A. Thanks for any advice.

Mark A. Gulbrandsen · 11th June 2006, 02:25 AM

If these are the outputs I am pretty sure they are Power Darlingtons and may be hard to find......Used to repair SAE stuff years ago at Midwest Hi-Fi near Chicago.

Mark

ostie01 · 11th June 2006, 03:39 AM

HI, you're right, they are the output transistor, 2 pairs TO-3

ostie01 · 11th June 2006, 03:47 AM

HI, by looking at the schematic, those are not darlington transistors

MikeBettinger · 11th June 2006, 07:20 AM

Quote:

Originally posted by ostie01
HI, by looking at the schematic, those are not darlington transistors

I worked in an SAE authorized service shop in New York when these were new. The outputs were definitely darlingtons.

I'll have to look at the schematic to see if I can suggest a replacement.

Mike.

ostie01 · 11th June 2006, 07:32 AM

Hi, thanks, here my address, just e-mail with a subject and I send you the schematic since I can't sent you personal message.

cubitus_61@hotmail.com

djk · 11th June 2006, 09:02 AM

Original parts were probably house branded 2N6059/2N6052, a 12A 100V 150W part, hard to find.

first choice:

Mouser

2N6284 TRANS DARL NPN 20A 100V 160W TO3 $3.84
2N6287 TRANS DARL PNP 20A 100V 160W TO3 $3.88

second choice:

Digi-Key

MJ11015 TRANS DARL PNP 30A 120V 200W TO3 $3.65
MJ11016 TRANS DARL NPN 30A 120V 200W TO3 $3.65 (non stock)

macka · 19th June 2006, 04:02 AM

SAEXXX1B issues:

ostie01,

Thanks for sending the schematic of the sae xxx1b

It would appear ths amp was blown up and one point and repair.

The actual fault I fixed was hum in one channel and I replace some electro capacitor on the input which helped.

However, some of the input diff transisters were odd types and I have replaced them with generci equivalents..

I note however one channel has odd bias of the darlington output stage of 0.01 while the other is 0.04 as stated in the schematic.

The voltage of the Q5 & Q 6 collector is 1.1 volt on one channel and about 0.114 volt on the other channel.

Both channel work functionally but I am stumped why these odd voltages and bias exist.

Any thoughts much appreciated

macka

macka · 20th June 2006, 11:02 PM

Okay,

I found out why the odd voltages from the drivers, one channel has a blown bias sensor SAE402.

I pulled apart the heatsink and what it is is a 17 pin UA3086PC transistor array. However I am not sure of that is the original part.

The original drivers the SAE801 and SAE 902 are also gone and it has 2n3440 and 2n 5416.

If anyone can advise what the badged pats were it would be appreciated

macka

ostie01 · 20th June 2006, 11:14 PM

Hi, the parts number of this transistor array on mine is CA3086. Just bought some of these parts from syracusesemiconductors on ebay, not expensive, only 0.40 each, I have one of these not working so still waiting for them, Jeff

11th June 2006, 01:57 AM	#1
ostie01 diyAudio Member Join Date: Mar 2005 Location: quebec	SAE mk XXX1B transistor sub HI, just mistype my last thread. Would like good sub transistors for the power amp SAE mk XXX1B. Service manual ask for SAE 103 and SAE 204. Number mark on transistor installed in the amp right now are 11-0064A and 11-0070A. Thanks for any advice.

11th June 2006, 02:25 AM	#2
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	If these are the outputs I am pretty sure they are Power Darlingtons and may be hard to find......Used to repair SAE stuff years ago at Midwest Hi-Fi near Chicago. Mark __________________ KSA-100 WIKI

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
which transistor is the best?	space2000	Solid State	1	26th April 2008 04:29 PM
Can bias transistor mount on top(body) of output transistor??	Leolabs	Solid State	23	16th February 2008 12:35 AM
what transistor to use??????	prorms	Solid State	6	2nd November 2006 01:42 AM
Transistor Id	glen65	Solid State	13	4th March 2006 10:31 PM
Transistor ID	EchoWars	Solid State	8	13th November 2004 07:08 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

11th June 2006, 03:39 AM	#3
ostie01 diyAudio Member Join Date: Mar 2005 Location: quebec	HI, you're right, they are the output transistor, 2 pairs TO-3

11th June 2006, 03:47 AM	#4
ostie01 diyAudio Member Join Date: Mar 2005 Location: quebec	HI, by looking at the schematic, those are not darlington transistors

11th June 2006, 07:32 AM	#6
ostie01 diyAudio Member Join Date: Mar 2005 Location: quebec	Hi, thanks, here my address, just e-mail with a subject and I send you the schematic since I can't sent you personal message. cubitus_61@hotmail.com

11th June 2006, 09:02 AM	#7
djk diyAudio Member Join Date: Feb 2001 Location: USA	Original parts were probably house branded 2N6059/2N6052, a 12A 100V 150W part, hard to find. first choice: Mouser 2N6284 TRANS DARL NPN 20A 100V 160W TO3 $3.84 2N6287 TRANS DARL PNP 20A 100V 160W TO3 $3.88 second choice: Digi-Key MJ11015 TRANS DARL PNP 30A 120V 200W TO3 $3.65 MJ11016 TRANS DARL NPN 30A 120V 200W TO3 $3.65 (non stock)

19th June 2006, 04:02 AM	#8
macka diyAudio Member Join Date: Dec 2001 Location: Australia	SAEXXX1B issues: ostie01, Thanks for sending the schematic of the sae xxx1b It would appear ths amp was blown up and one point and repair. The actual fault I fixed was hum in one channel and I replace some electro capacitor on the input which helped. However, some of the input diff transisters were odd types and I have replaced them with generci equivalents.. I note however one channel has odd bias of the darlington output stage of 0.01 while the other is 0.04 as stated in the schematic. The voltage of the Q5 & Q 6 collector is 1.1 volt on one channel and about 0.114 volt on the other channel. Both channel work functionally but I am stumped why these odd voltages and bias exist. Any thoughts much appreciated macka

20th June 2006, 11:02 PM	#9
macka diyAudio Member Join Date: Dec 2001 Location: Australia	Okay, I found out why the odd voltages from the drivers, one channel has a blown bias sensor SAE402. I pulled apart the heatsink and what it is is a 17 pin UA3086PC transistor array. However I am not sure of that is the original part. The original drivers the SAE801 and SAE 902 are also gone and it has 2n3440 and 2n 5416. If anyone can advise what the badged pats were it would be appreciated macka

20th June 2006, 11:14 PM	#10
ostie01 diyAudio Member Join Date: Mar 2005 Location: quebec	Hi, the parts number of this transistor array on mine is CA3086. Just bought some of these parts from syracusesemiconductors on ebay, not expensive, only 0.40 each, I have one of these not working so still waiting for them, Jeff

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)