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Old 30th September 2012, 11:24 PM   #1
WSJ is offline WSJ  United States
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Default LM3875 socket

I'm looking for a LM3875 socket. Single pin sockets would be OK.
The pins are .015" thick, .038" wide, .134" spacing in two rows. The pins come in two rows .200" front to back.

Data sheet LM3875:

http://www.ti.com/lit/ds/symlink/lm3875.pdf
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Old 1st October 2012, 12:14 AM   #2
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Normally you would never socket a power amp chip due to the high currents and the expensive consequences of a bad contact on the speakers
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Old 1st October 2012, 12:42 AM   #3
WSJ is offline WSJ  United States
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Quote:
Originally Posted by davidsrsb View Post
Normally you would never socket a power amp chip due to the high currents and the expensive consequences of a bad contact on the speakers
I agree, but it can be tested for many parameters without a load. Then moved to a board and soldered in for testing with a speaker.

See Opamp test circuits.
Discrete Opamp test circuits

Last edited by WSJ; 1st October 2012 at 01:03 AM.
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Old 1st October 2012, 04:19 AM   #4
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Other reason is the heatsinking property of the sodered pins.

Gajanan Phadte
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Old 1st October 2012, 02:00 PM   #5
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If the leads fit, the turned pin type of IC socket can be broken up and soldered into a pcb with appropriate sized holes. Twenty years ago I used to buy these pins on a metal header matching a dil IC size for in board soldering, but I haven't seen these for a long time.
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Old 1st October 2012, 10:05 PM   #6
WSJ is offline WSJ  United States
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Quote:
Originally Posted by davidsrsb View Post
If the leads fit, the turned pin type of IC socket can be broken up and soldered into a pcb with appropriate sized holes. Twenty years ago I used to buy these pins on a metal header matching a dil IC size for in board soldering, but I haven't seen these for a long time.
Great idea, thanks.
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Old 28th September 2013, 04:58 PM   #7
WSJ is offline WSJ  United States
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Quote:
Originally Posted by davidsrsb View Post
Twenty years ago I used to buy these pins on a metal header matching a dil IC size for in board soldering, but I haven't seen these for a long time.
I would like to buy some of these pins, any ideas where I can find some?

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Old 29th September 2013, 09:50 AM   #8
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Buy 14/16/20 way dil sockets and break them up.
The ones in the photo are the cheaper leaf contact, not turned pin
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Old 29th September 2013, 11:59 AM   #9
RJM1 is offline RJM1  United States
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Like these?
6100-1X7R: Socket Sipp 7 Pin Machine Tool Pins Soldertail Strip: Jameco Valuepro
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Old 29th September 2013, 12:06 PM   #10
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Those are good quality. Be careful that the leads you want to plug in fit, turned pin sockets have a limited diameter range and some devices, especially power, have very wide leads
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