Solar amplifier

[shanecapetown]

Hi guys im currently busy with a solar class d amplifier I got the amp with the power supply fets blown replaced it and powered up the amp i got class d switch on output fets and amp is playing but there is a high pitch sound on the speaker no fets heating up just the AG AND DK ON DRIVER BOARD BUT IT'S NOT BURNING HOT JUST LOW is that normal?

 

[Perry Babin]

Photos of the main and driver board?

Does it sound like this:
http://www.bcae1.com/temp/cooleditmixedoscillator01.wav

Are you hearing it through a subwoofer or are you using a full range speaker for testing?

 

[shanecapetown]

Photos of the main and driver board?

Does it sound like this:
http://www.bcae1.com/temp/cooleditmixedoscillator01.wav

Are you hearing it through a subwoofer or are you using a full range speaker for testing?

It does make that sound yes I'm using a full range speaker to test

 

[Perry Babin]

That's normal for an amp that doesn't have synchronization between the power supply and output stage oscillators.

There isn't much you can do about it. It's generally not bad enough to be heard with subwoofers, especially when they're mounted in the trunk.

 

[shanecapetown]

That's normal for an amp that doesn't have synchronization between the power supply and output stage oscillators.

There isn't much you can do about it. It's generally not bad enough to be heard with subwoofers, especially when they're mounted in the trunk.

Ok thank u sorry is it normal for the Dk & AG transistors to warm up

 

[shanecapetown]

Ok thank u sorry is it normal for the Dk & AG transistors to warm up

 

[Perry Babin]

Yes.

On amps like this, you have to confirm that ALL output transistors have drive. It's possible for some of the drive circuits to fail and the amp still work (or appear to work) normally.

 

[shanecapetown]

Yes.

On amps like this, you have to confirm that ALL output transistors have drive. It's possible for some of the drive circuits to fail and the amp still work (or appear to work) normally.

Hi Perry all outputs gets drive . So this amp is good. To go