Mpp

[sampler]

Mhm, now I got it, cascodes with symmetrical ccs'es are making reference for signal, it should work without any resistors to ground. They are kinda in signal path, but that can be taken care of by making extremely good ccs'es. Or even better, we can put them inside mirrors and replicate that MiiB's auto biasing part (that I really like). Then servoing it and voila - dc coupling. Damn, group thinking is such a powerful thing

[sampler]

One thing though, J74... i paid 40Eu for my last batch of non fake matched octet, and supply's are running out fast

[Joachim Gerhard]

I have 2000 and can get more from a reliable source, no worries, really.

[MiiB]

Cant it e made with bipolars.....???

Miib(high in the air)

[Joachim Gerhard]

This is very rudimentary, a transimpedance-balanced-diffential BJT input cell......

[Benedetto]

Baby baby balla balla - YouTube

[sampler]

Ok, it works like a charm ! But I don't see any common mode cancellation Attached fft of 2 matched channels, red - balanced, light blue - se. Have to make some balanced measurement setup later, so this is only same cart channel connected to aether input. So much for today, I'm out

[Joachim Gerhard]

Good start !
Good night from me too.

[Joachim Gerhard]

Michael, i really would like to use Fets at the input this time. They have a certain charm that is really helpful here. Balanced with Fets will give an alternative in sound and performance to the Paradise. I have access to enough P-Channels and can organize a group buy if this design makes it on a PCB. This will be the last complete phono stage design i will support. I am simply running out of time. I think i presented enough food for thought and will keep this thread going. There are always new ideas and a lot of old problems can be discussed and solved. What i would like to do in the future besides posting here as often as my schedule allows is making a PSU for a turntable motor. I think it is best to open a new thread for this maybe in three month from now.

[Bksabath]

Good morning to you all.

I got a batch of the BC 32740 and BC33740 direct from Fairchild Direct
Farnell does not have the 40s and
Onsemy does 16 and 25
Multycomp is I believe a sourche from multiple alternative manufacturer copies

Frans posted a realy decent link to his suplier and I would suggest you look there first.

Any way
I will start matching soon.

The DCA55 Atlas component tester is ok apart from chewing bateries and having to wait and scroll buttons

I was wondering if using a set up as in the first picture could speed up things and be reliable for a preliminary sort of the batch.
This is the link of the web page.
Transistor matching