Longer lead TIP35 and 36

spiette · 1st December 2009, 07:13 AM

I picked up a Eclipse 32440 with a blown channel. (four channels ~30v rails) It uses a TIP35C/36C set for each channel and the one complementary pair was shorted on the dead channel. The ST parts I got from Mouser have shorter leads than the MOSPEC parts. Like 5mm shorter and barely reached the circuit board.

I can't find the MOSPEC parts locally, any suggestions for other replacements?

Eva · 09:09 AM

How about prolonguing the leads? By soldering pieces of solid wire for example

btw: Some lazy "technicians" here just don't bother removing the PCB to change transistors, they cut the leads of the shorted transistors and solder the new ones to the old leads, but that's a different thing. I always replace the entire transistor, as long as the leads are long enough

spiette · 1st December 2009, 12:36 PM

Thank you.

If there are no other alternatives what else could I do but lengthen them but that's the last and least preferred option.

It seems however that there are transistors with the longer leads, I just have to find them since it's likely I'll be doing this again. The rest of the models in this line use the basic design and same transistors but parallel the outputs and raise the rail voltage for higher output.

richie00boy · 1st December 2009, 02:21 PM

I have some of the MOSPEC devices for sale and can get more, if that helps.

spiette · 1st December 2009, 06:36 PM

Quote:

Originally Posted by richie00boy

I have some of the MOSPEC devices for sale and can get more, if that helps.

Can you confirm the lead length is > 20mm?

Apex Jr · 1st December 2009, 11:34 PM

I too have both TIP 35 and 36 in the C version 100 Volts
Leads measure 9/16" long
Mine look like a large TO-220 package
Made by ST in Morocco
Price $1.25ea

Steve @ Apex Jr.

spiette · 2nd December 2009, 04:59 AM

Quote:

Originally Posted by Apex Jr

I too have both TIP 35 and 36 in the C version 100 Volts

I already have plenty of the ST parts which have 9/16" leads. I don't need more. Thanks anyway.

I should have looked closer at the datasheet (it says the leads are 14.2mm to 14.8) before I bought them. They worked but just barely.

What I'm looking for are TO-247 parts with leads 20mm or longer. MOSPEC says theirs range from 18.5mm to 21.5mm.

richie00boy · 2nd December 2009, 10:15 AM

About 19mm in TO247 case.

I have 2x TIP35C and 2x TIP36C. I can get more but they are about double Steve's price.

1st December 2009, 09:07 AM	#2
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	How about prolonguing the leads? By soldering pieces of solid wire for example btw: Some lazy "technicians" here just don't bother removing the PCB to change transistors, they cut the leads of the shorted transistors and solder the new ones to the old leads, but that's a different thing. I always replace the entire transistor, as long as the leads are long enough __________________ I use to feel like the small child in The Emperor's New Clothes tale Last edited by Eva; 1st December 2009 at 09:09 AM.

1st December 2009, 02:21 PM	#4
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	I have some of the MOSPEC devices for sale and can get more, if that helps. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

2nd December 2009, 10:15 AM	#8
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	About 19mm in TO247 case. I have 2x TIP35C and 2x TIP36C. I can get more but they are about double Steve's price. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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1st December 2009, 12:36 PM	#3
spiette diyAudio Member Join Date: Jan 2006 Location: St. Charles, IL	Thank you. If there are no other alternatives what else could I do but lengthen them but that's the last and least preferred option. It seems however that there are transistors with the longer leads, I just have to find them since it's likely I'll be doing this again. The rest of the models in this line use the basic design and same transistors but parallel the outputs and raise the rail voltage for higher output.

1st December 2009, 11:34 PM	#6
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	I too have both TIP 35 and 36 in the C version 100 Volts Leads measure 9/16" long Mine look like a large TO-220 package Made by ST in Morocco Price $1.25ea Steve @ Apex Jr.

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