Combined Onaudio thread. (23 threads)

[OnAudio]

Nice progress RSK, a cute photo will do . Cheers

 

[RSK]

Some progress

Nice progress RSK, a cute photo will do . Cheers

Here is one chanel almost complete.
Little slow but things are taking shape. Hope to fire up soon

Harrison, what value should I set the bias?

Regards.

 

[OnAudio]

Nice progress
am preparing comments

 

[OnAudio]

a picture

Hi Raj checkout these

 

[OnAudio]

a regulated mod.

 

[OnAudio]

here it is 😉

image attached

 

[OnAudio]

bias

Hi Raj,

Thanks for the good job you are doing Raj. Apologies regarding the bias, use 5mV rather than 23mV as shown in post #1 .

kind regards,

Harrison.

 

[OnAudio]

rev1

Here it is. I hope to see you construct both the original and revision 1 and offer your experiences 😉

 

[OnAudio]

bias setting

Adjust bias to read 1 volt across R7

 

[OnAudio]

change R2 as attached

Change R2 to 3.3k

 

[OnAudio]

builders needed

This amplifier is in a class of its own, it explores the edges of technology and challenges the concepts of T.H.D. and the perceptions on quasi complementary among others. This amplifier may very well be the best among the quasi according to the formula 😉

However do you find it acceptable, pleasing or not. To help us answer these questions and have a large field of respondents, kindly build to contribute to the state of the art. Experiment with the darlingtons you have available as others prefer flat paks and there are also cost related factors.

kind regards,

Harrison.

 

[OnAudio]

The LM3886 has been used in studio reference monitors and it is a quasi 😉, is the 1DIFFQC better ?

 

[OnAudio]

Hi members need volunteers for this amplifier . Be a sport

 

[OnAudio]

Hi Drow,

Could you provide a pcb for the new version using 2pairs of TIP142 per side rather than MJ11032 for Paul.

Thanks 🙂

 

[OnAudio]

a TIP142 mod

This is for those that are seeking flat packs

 

[drowranger]

Pcb for flatpack

Hi Harrison,

This is what I have come up.

regards,
joel

 

[OnAudio]

Joel, you are getting very good .....

Could we move the input connector a little away from the incoming power. How about a 8 output transistor version 🙂

kind regards,

Harrison.

 

[OnAudio]

Due to the smartness and compactness of the layout you may consider moving the incoming power slightly left, that will clear it from the input.

 

[PauloPT]

Good job, Joel! 🙂

 

[drowranger]

modified pcb.

Hi Harrison,

I have moved the coupling capacitor and fuse as you have requested.Pls. check if there's still to improved.If this is ok then will proceed to 4 pairs output.

regards,
joel