Nikko alpha iii stereo amplifie
![nikko alpha iii stereo amplifie nikko alpha iii stereo amplifie](https://thumbor.offerup.com/yy3aRxHGl9x4FTCUnwU4kYfCC4I=/333x250/ab42/ab42879e4cd2430081a11d668e49bf05.jpg)
I've tried this with two different sources, speakers, speaker wires. In particular, the midrange and lows mostly sound fine but the treble in both channels is severely clipped and warbled. Now, I've turned it on, and hooked it up to my speakers, and it produces music. The most recent repairs were the power cap replacements and fixing the capacitor on the protection circuit board. (I should note that the amplifier and power supply boards are made of a different, higher quality material and are holding up just fine)Įvery fix I've done has usually resulted in me gacking something else up, so the state of the amp has been between one channel muted to the other channel muted to functional-at one point it worked but when I put the chassis and heatsinks back together, a bare wire shorted a one channel and a cap on the protection circuit's PCB trace came loose while I was checking it. Replaced one capacitor on the protection circuit using jumpers, since it seems to be degrading in the same way as the transistor PCBs with the traces coming loose.The originals were 10,000 uF/63V, the new ones are 22,000 uF/63V. Replaced the 4 power capacitors with caps of the same voltage rating and size, to make mounting the new ones into the chassis as easy as possible.Replaced all of the wiring on the main transistors (the ones attached to the heatsink) with jumpers, since the circuit boards they were mounted to were degrading and losing their connection (hence the scratchy left channel).I should note that the protection circuit board, the only other board in the amplifier, had already been serviced when I got it. Several of them on the amp boards were leaking, a couple had leaked quite a bit. Replaced all capacitors on the power supply board and amplifier boards.Keep in mind that I have no formal education regarding electronics, and my knowledge of circuits is very, uh, rudimentary.
#NIKKO ALPHA III STEREO AMPLIFIE HOW TO#
I figured it would be a great project to learn how to fix up an amplifier. Long story short, a friend of mine gave me a Nikko Alpha II power amplifier that had a scratchy right channel.