Test Jig for Multiple DOA / 2520 and 990 types?

[outoftune]

I was wondering if anyone knows of a preexisting product or PCB / kit for testing / burning DOA's.

I usually use an API 512 pre to test them one at a time but would like to be able to test / burn in multiples at one time.

I have a bench supply that can run the PSU. I know I could build a breadboard with I/O and the opamp as a gain stage...but I'm wondering if one exists that can test / burn in multiples at one time?

 

[mrclunk]

I seen some but not for multiple DOA at the same time, just for testing individual amps.
Think Volker does one.
https://groupdiy.com/threads/discrete-opamp-test-jig.60489/

 

[outoftune]

I seen some but not for multiple DOA at the same time, just for testing individual amps.
Think Volker does one.
https://groupdiy.com/threads/discrete-opamp-test-jig.60489/

Hi, thanks for this...this could be exactly what I need, I will just buy multiples.

 

[Ricardus]

I made a jig that made it easier to SOLDER pins to 2520 style opamps, but it isn't a test jig. It's just for soldering and pin alignment. But some people have made test jigs with them.

I actually bought a test jig from Five Fish Audio.

Here's my alignment jig.

 

[warpie]

There's also this. Haven't used it thought.

https://www.fivefishstudios.com/shop/index.php?route=product/product&path=71&product_id=69

 

[JohnRoberts]

Back in the 70s before commercial op amps were as good as they are now I used to test 1,000 pcs orders 100% for my kit company customers. (I used a ZIF socket). 100% testing allowed me to tell the customers that the ICs were known good when I sold them.

I would test a quad op amps by running the four channel in series with unity gain inverting feedback resistors. To stress the opamps I increased the noise gain to something like 100x for each stage. Adding a resistor from the - input to ground increases the noise gain while still passing the unity gain signal. I passed a sine wave through this set up and watched the output with a scope. Bad/suspect IC revealed I/f noise and other process issues.

Back in the 70's I would find single digit rejects from a 1,000 pc batch... by the early 80's the ICs they shipped were better and I stopped testing 100%.

JR

 

[Ricardus]

There's also this. Haven't used it thought.

https://www.fivefishstudios.com/shop/index.php?route=product/product&path=71&product_id=69

That's the one I wrote about.

 

[fazer]

Use a capi summing amp pcb

Classic Audio Products, Inc.

 

[Clintcleveland]

There's also this. Haven't used it thought.

https://www.fivefishstudios.com/shop/index.php?route=product/product&path=71&product_id=69

I just put one of those together last week and it’s great. It has a DIP spot, too, so you can test both.

Probably going to get another for A/B testing.
Another option would be the DIYRE DOA colour module. It’s cheap and simple, but you’d need to do some wiring to set up multiples

 

[mobyd]

I had a bunch of these to test (toaster oven reflow specials) so made a little jig using 0.1" matrix board and "sockets" gleaned from a PCB DB25F. Multiple ? Rinse and repeat.

 

[fazer]

4 plug in 2520:s on a capi summing amp board