First One - mosFET amplifier module

[felixx]

Hmmm....it seems most problems are on the input stage.Probably very sensitive.... but using galvanic separation audio transformers (high quality) should not be any issues....
Lundahl Transformers • Line input and line output transformers

Will be nice to hear some sugestions from Andrej...

 

[Erlend Sæterdal]

Destroys all dynamics. Very booring sound.

 

[analog_sa]

Destroys all dynamics. Very booring sound.

+1.

Renders the entire idea of having a good amp pointless.

 

[hop.sing]

+1.

Renders the entire idea of having a good amp pointless.

Mhhh, that’s your opinion, not an absolute truth... or are all recordings from the pre digital era pointless? Magnetic tape changes the dynamics of music much more than a good transformer.
Transformers can be nearly undetectable. I guess an amp that destroys itself all the time is pointless.

 

[Erlend Sæterdal]

My opinion is about Lundahl only.

 

[analog_sa]

And so is mine. And specifically about the ungapped, miniature transformers from the link.

 

[hop.sing]

Ah sorry, misunderstood those comments... I don’t know those specific transformers... but like the large interstage lundahls.

 

[J.M.K]

Hmmm....it seems most problems are on the input stage.Probably very sensitive.... but using galvanic separation audio transformers (high quality) should not be any issues....
Lundahl Transformers • Line input and line output transformers

Will be nice to hear some sugestions from Andrej...

This one is really good :

http://www.jensen-transformers.com/wp-content/uploads/2014/07/CI-2RR.pdf

JMK

 

[maxlorenz]

If one is thinking about expensive input TX, why not think about expensive but great (not) sounding TVC's?
(transformer volume control)

Cheers,
M.

 

[UltimateX86]

Hello, do you have the reference for this 15k smd resistance (1502) ?
https://www.diyaudio.com/forums/att...89360189-mosfet-amplifier-module-module-2-jpg

Thanks

 

[Lazy Cat]

Short update, MELF resistors almost all reels here, other SMD reels on order - coming soon. Don't want let anything to a manufacturer's lucky chance, all materials placed on modules will be 100% approved by me. In the mean time we have a lot of fun in our shop.

Cheers L.C.

 

[UltimateX86]

Hello LC, i would like using 1.2 version with lower supply, so I need to decrease the resistance on CSS, maybe adding 15k in parallel, could you give me the reference ?
Thanks

 

[Lazy Cat]

Hello LC, i would like using 1.2 version with lower supply, so I need to decrease the resistance on CSS, maybe adding 15k in parallel, could you give me the reference ?
Thanks

At +/-60 V PSU measure the voltage drop on 15 k resistor, calculate CCS current.
At lower PSU voltage set the resistor value to get the same CCS current.

 

[Lazy Cat]

Some magical moments in our shop

Magico M3 (pic1-6)

Magico S3 Mk II (pic7-10)

 

[Studley]

It will be a bloody magical moment when you fix my amp module like you said you would about 18 months ago 😡

 

[Lazy Cat]

Plan your visit

We have four Magico pairs prepared for your listening experience:
- M3
- S3 Mk II
- S1 Mk II
- A3

connected to our First One electronics.

All warmly invited to visit us at UBIQ AUDIO in Ljubljana until April the 6th, welcome.

 

[Lazy Cat]

It will be a bloody magical moment when you fix my amp module like you said you would about 18 months ago ��

We agreed in exchange plan, gathering reels and reels ... soon

 

[Erlend Sæterdal]

Lacy Cat I need some moduls for a DCA guy.

 

[Lazy Cat]

DCA, some kind of an avenger?

 

[Erlend Sæterdal]

DCA, some kind of an avenger?

Thought you know. "Duelund Coherent Audio"