Bwahahaha you crack me up, dude......cuz you STILL be "en-ga-neerin'"!!! I hope you and the family are all doing well!!!! I'm nine months into retirement and loving it. Should be getting my first SS check this month! Thanks for this chance to "see" you. Hopefully you're enjoying being retired as much as I am.
Hi. I have found chip that I also need to replace but have one question. It must be 20W chip or it can be 30 or 33 W? Higher audio power might occur some other problems? Or this electrical system can handle this power? Or maybe original chip have more wattage than whole amp? Cheers.
The STA540 is actually 2x 34 W into 8 Ω at 22 V, 1 kHz, 10% THD. Or 2x 15 W into 8 Ω at 16 V, 1 kHz, 10% THD. It is my belief that they chose to run it in between with a large heatsink to maximize the life of the chip and minimize failures. Several parameters would need to be analyzed if modification were intended, not the least of which would be power supply capability. I think I would stick with the original design.
I believe it runs on 15 volts 2 amps. I still suggest not getting in the habit of putting your fingers inside powered electronics. But these are more benign then most.
