Highest quality design

[MJL21193]

Originally posted by CBS240


The PCB in work is for this amp. It works increadibly well constructed on cheap vero board, it should work with a properly designed and built PCB...the current challenge is to not make any mistakes!! ...may take months to optimize.

Hi,
You put this amp on vero board?? Wow.

EDIT: Do you have a picture of that?

[AKSA]

My golly CBS,

It looks like the wall texture from Tomb Raider!!

WOW!! All on veroboard, too!!

However, as an aside, it's probably too complex and you might like to try to distill it down to something much more simple with as good a sound..... that is your challenge!

Cheers,

Hugh

[CBS240]

rediculous, eh?

But yes, since most all components are SMD, it fits...in the 'Ugly Amp' thread.
http://www.diyaudio.com/forums/showt...06#post1369406


That prototype construction method is another thing I learned...hey, it works and it's cheap.

[KLe]

Hi CBS240

That's excellent, please keep us posted
I remember reading through those posts a little while ago, but, I did not understand everything. Kanwar, certainly did though
Homemade HeatSinks and excellent eye sight


Maybe someone would like to Spice it and tell us the results.

thanks
ciao

[MJL21193]

Originally posted by KLe

Maybe someone would like to Spice it and tell us the results.

That would take a while. Like translating the Dead Sea scrolls, or completing the Human Genome Project.

[CBS240]

Originally posted by AKSA
My golly CBS,

It looks like the wall texture from Tomb Raider!!

WOW!! All on veroboard, too!!

However, as an aside, it's probably too complex and you might like to try to distill it down to something much more simple with as good a sound..... that is your challenge!

Cheers,

Hugh

It isn't really as complicated as it appears, lots of cascode. Actually it is just multiple amplifier's in cascade with direct coupling, essentially. I should be able to use several SOT-563 package devices for most of the small signal BJT's, they will be well below 100mW, Pd is not very large for SOT-563. This will save lots of space. Many resistors qualify the specs for SMD size 201, if I can see them. Most are but a few mW.

Originally posted by KLe

Maybe someone would like to Spice it and tell us the results.

Good luck with the Spice sim for this one.

[Nico Ras]

Originally posted by CBS240


It isn't really as complicated as it appears, lots of cascode. Actually it is just multiple amplifier's in cascade with direct coupling, essentially. I should be able to use several SOT-563 package devices for most of the small signal BJT's, they will be well below 100mW, Pd is not very large for SOT-563. This will save lots of space. Many resistors qualify the specs for SMD size 201, if I can see them. Most are but a few mW.



Good luck with the Spice sim for this one.

Wow SMD 201! are you planning to make it pocket size?


EDIT: I would be afraid to redraw it let alone put it on vero-board

[D_o_S]

Ok, thanks for the replies...

Any opinions on the simple killer amp by Greg Ball then?

Here is what I have atm:
Sonus Faber Concertino Domus speakers, 4 ohms, rated at 100-150W
Technics GA-SX690 integrated amplifier...

I am looking to build a pre-amp as well as a power amplifier...

I would like it to drive the speakers, so 100W is a minimum...

I would like it to be class A.

I will take a look at the Pass Labs forum...
EDIT: Just checked out Pass Labs, that looks like what I would like to build, the Aleph-X

[Greg Erskine]

Originally posted by D_o_S
Here is what I have atm:
Sonus Faber Concertino Domus speakers, 4 ohms, rated at 100-150W
Technics GA-SX690 integrated amplifier...

I am looking to build a pre-amp as well as a power amplifier...

I would like it to drive the speakers, so 100W is a minimum...

I would like it to be class A.

Hi D_o_S,

You have not mentioned the efficiency of the speakers. The is probably the most important spec to determine the size of amp required.

Do you understand the power dissipation of a 100-150 watt class A amp? It will require enormous heat sinks and power supply i.e. expensive.

Ask your dad about the differences between class A and class AB amps.

regards

[KLe]

Hi D_o_S

For opinions of the SKA have a read of this thread ... Simple Killer Amp - Listening impressions

ciao