Hi there, Hopefully one of you knowledgeable people can help me put. I'm repairing a Sony TA-FA3ES and have discovered some Mosfets that aren't working as they should. The component numbers is 2SJ201-Y & 2SK1530-Y Sadly they are out of production and it seems only second hand are available at...

I have a THX 789 that no longer powers on. The power button no longer clicks like it used to and the red light can be turned on if I press the power button repeatedly. Altho, it dims out and stays dimliy lit. And no audio comes through. The power bricks green light does light up. What lead to my...

If you frequent the DIY forum here, then there's a good chance you know about Kevin Gilmore and his contributions to the DIY design library. From Dynalo to Dynahi, to top of the line electrostatic amps like the KGSS and it's fancier cousins. Less known are his current feedback designs for...