Measuring 2-channel Buckeye Purifi Amplifier Performance

[Rick Sykora]

So, as am updating my amps, here is some visual proof for the cause of the slight distortion rise that was seen when Amir tested the Buckey 3 channel amp...

Note that the above graph is just THD vs Power. I thought this would be more interesting as the ferrous content primarily introduces distortion. For a preview of updated SINAD vs Power results, see below...

Note the expected hockey stick graph as the distortion rise has been reduced.

 

[AndreaT]

So, as am updating my amps, here is some visual proof for the cause of the slight distortion rise that was seen when Amir tested the Buckey 3 channel amp...

View attachment 267430

Note that the above graph is just THD vs Power. I thought this would be more interesting as the ferrous content primarily introduces distortion. For a preview of updated SINAD vs Power results, see below...
View attachment 267431
Note the expected hockey stick graph as the distortion rise has been reduced.

It might sound naive, but what are ferro and non-ferro tabs?

 

[Rick Sykora]

It might sound naive, but what are ferro and non-ferro tabs?

In this case, the original binding post tabs had steel content, the new ones are brass.

 

[NTK]

Are the graph labels reversed? Shouldn't the non-ferro tabs give lower THD?

 

[Rick Sykora]

Are the graph labels reversed? Shouldn't the non-ferro tabs give lower THD?

Thanks good point, the label UI is tricky here, will fix.

 

[AdamG]

Thanks good point, the label UI is tricky here, will fix.

Well reversing the labels on the graph would be one way to fix it!