Wayne's BA 2018 linestage

[mpmarino]

Any thoughts or comments on Wayne's linestage presented at BA 2018?

It looks like an economical high performance design with a couple of nice options (like a beefier output if needed)

I'm a terrible designer and a slow builder - I think we wound be interested in hearing if there are any experiences or opinions yet.

Thanks Wayne!

YouTube

 

[Zen Mod]

 

[mpmarino]

Not very helpful ZM, Wayne's version doesn't have an LCD display.

 

[McQuaide]

I'm interested in this. The only component in my amplification chain not built my me is the preamp.

 

[phomchick]

I will also build this when I get some time. All the parts are available from Mouser, and add up to less than $30 (plus a power supply, case and hardware).

 

[mlloyd1]

wayne's line stage is just BEGGING for the 6 transistors, LED and passives to make it differential in and out ...



mlloyd1

 

[EUVL]

Can anyone who manage to download the Power Point from :
Linear Systems

?


Patrick

 

[mlloyd1]

Patrick:

I can only see burning amp stuff (videos and slides) using the Chrome browser. The IE and FireFox based browsers don't show anything but blank pages.

Here's a link to Waynes power point slides: http://www.linearsystems.com/lsdata/files/BA2018-R1_Wayne.ppt

mlloyd1

 

[EUVL]

I have the link, but it would not download from Firefox.
Maybe you can post it here for others with the same problem.


Patrick

 

[Zen Mod]

.....

download it from here (too big to attach directly) :

Dropbox - BA2018-R1_Wayne.zip

 

[mpmarino]

Squished down

wow - too far down!

 

[tsmith1315]

No problems downloading the .ppt with Firefox here. It's good to see some interest.

 

[mpmarino]

wayne's line stage is just BEGGING for the 6 transistors, LED and passives to make it differential in and out ...



mlloyd1

?? Did I miss something, or is this what you've drawn in your head?

 

[EUVL]

N-P complementary all the way except for the input stage.
What a pity !




Patrick

 

[kasey197]

N-P complementary all the way except for the input stage.
What a pity !




Patrick

I'm happy for Wayne to correct but I think that is precisely the point of this exposition- a design exercise without P-Jfets at the input stage..

 

[EUVL]

Then why not fully single ended like a Borbely EB602 ?
A complementary circuit with only a single ended front end looks like a compromise to me.


Patrick

 

[mpmarino]

Patrick,

What part is the compromise? The single ended part, the complimentary part, or the fact that both topologies are incorporated?

 

[EUVL]

Complementary input allows push-pull, reduces current swing on each half, and cancels even harmonics.
As is, the bottom half is essentially all constant current, with the exception of the last stage.


Cheers,
Patrick

 

[ggetzoff]

Choky is a Swiss-Army knife.....of sorts

 

[mercedese63]

Looks like this thread has sort of "petered out" temporarily for whatever reason.

Wayne...I noticed you offered 100+ purple PCBs for your design at BA 2018.
Like many folks here, I can't drop everything and go to the west coast for this BA 2018 event.
So do you plan on offering Gerbers for your board here in this thread or offering PCBs in the DIY Store in the near future for this preamp??

An update as to your intentions would be nice rather than leaving us and the OP hanging.