Self Medicating > General DIY

op amp upgrade

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richidoo:
The PS caps will drain pretty quickly, just let player sit unplugged for 30 seconds before you start surgery.

You should be able to see pin one marking on any of these opamps. SOmetimes it is just a round indent, or a white ink mark. Something subtle. The socket or PCB should also have a subtle mark noting pin one. This will help avoid killing chips. If you don't know, put some junkers in there that won't cost you if you guess wrong. Then when you get it to work, mark the PCB with a red marker dot so you know where pin one is in future. After frying a chip already I bet you are well sure how they go in now, right?

If your new chips are not DIP (plug in), you should be able to get your own samples from National's website, or just solder the new ones to the board. I bet you will like them! They look awesome on paper, but unfortunately that doesn't say much.

Please report back when you get them makin noise!
Rich

shep:
Thanks all. I will surely relay my findings. I honestly can't do soldering this
fine, so will be looking for assistance. The Brown Dog adaptors meant that the chip was turned 90° degrees from the original, hense my mistake.
Otherwise I would have just used the lettering as a guide. Yeah the chip measures the best. I hope the sound follows suit. I still wish someone knew how a "fried" chip can still work. When is fried not fried? (the sound of one hand clapping syndrome)

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