Need Help for Tube Driver

variable · 26th May 2007, 12:37 PM

My old Butler Tube Driver-2x75W (yellow casing) just died. The problem is with the transistor the big one (motorola type). The problem is the model code has been rubbed off. Anyone have the reference of the transistor used in this amp?

1moreamp · 27th May 2007, 06:01 AM

E-mail sent.

variable · 27th May 2007, 05:36 PM

Thanks.
I was advised by the supplier that they are 2SK135 and 2SJ49 but was told they are no longer in production. I wonder if yours are using the same parts.

1moreamp · 30th May 2007, 09:43 PM

No mine is a PPI edition, sorry. I see those transistors on E-bay from time to time but they are always TO-3 packaged.

TO-3 · 4th June 2007, 11:18 PM

I'll have to look at the amp that I have. Hitachi quit making those parts a long time ago and BK Butler substituted Exicon devices to replace them. IMO they were greatly inferior to the Hitachi parts and as a result I called for closing down production of the TDs. I would recommend replacing them with the same parts, if you can find them, or spec a part yourself.

TO-3 · 4th June 2007, 11:39 PM

Stupid refresh button.

niteowl · 6th June 2007, 03:06 AM

I may have what your looking for. The company I worked for sold and serviced them. I have 2 of the old 750's and the crossover in my car. I will look in my junk pile and see If I can help.

Martin

variable · 7th June 2007, 06:49 AM

Can't find the Hitachi's. What would be the best substitute?

26th May 2007, 12:37 PM	#1
variable diyAudio Member Join Date: Sep 2006	Need Help for Tube Driver My old Butler Tube Driver-2x75W (yellow casing) just died. The problem is with the transistor the big one (motorola type). The problem is the model code has been rubbed off. Anyone have the reference of the transistor used in this amp?

4th June 2007, 11:18 PM	#5
TO-3 diyAudio Member Join Date: Feb 2004 Location: Phoenix, Arizona	I'll have to look at the amp that I have. Hitachi quit making those parts a long time ago and BK Butler substituted Exicon devices to replace them. IMO they were greatly inferior to the Hitachi parts and as a result I called for closing down production of the TDs. I would recommend replacing them with the same parts, if you can find them, or spec a part yourself. __________________ Check out Tube Driver BLUE products at: www.tubedriver.com

4th June 2007, 11:39 PM	#6
TO-3 diyAudio Member Join Date: Feb 2004 Location: Phoenix, Arizona	Stupid refresh button. __________________ Check out Tube Driver BLUE products at: www.tubedriver.com

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27th May 2007, 06:01 AM	#2
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	E-mail sent.

27th May 2007, 05:36 PM	#3
variable diyAudio Member Join Date: Sep 2006	Thanks. I was advised by the supplier that they are 2SK135 and 2SJ49 but was told they are no longer in production. I wonder if yours are using the same parts.

30th May 2007, 09:43 PM	#4
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	No mine is a PPI edition, sorry. I see those transistors on E-bay from time to time but they are always TO-3 packaged.

6th June 2007, 03:06 AM	#7
niteowl diyAudio Member Join Date: Sep 2005	I may have what your looking for. The company I worked for sold and serviced them. I have 2 of the old 750's and the crossover in my car. I will look in my junk pile and see If I can help. Martin

7th June 2007, 06:49 AM	#8
variable diyAudio Member Join Date: Sep 2006	Can't find the Hitachi's. What would be the best substitute?

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