Bryston 4B SST clone

[Sensation45]

1n914

I don't think replacing the zener will change anything. The zener is just a voltage reference and the darlington transistor configuration draws a very small amount of base current.
The MJE15034 is responsible for delivering enough current, and must have a sufficient heatsink.
I think this regulator has enough current capabilities to supply an additional DOA33.
Try it, and just feel the MJE15034 not heating too much. I don't think it will.

thank you for the information.. are you using 1n914 diodes? It looks very nice

 

[m0rten]

DOA33

If I replace the 33v 1w zener diode in 4b with a 3w 33v zener diode

thank you for the information.. are you using 1n914 diodes? It looks very nice

Thank you! I think the diodes are 1N4148...

 

[Sensation45]

Thank you! I think the diodes are 1N4148...

pcb's arrived

 

[Sensation45]

pcb's arrived

 

[Sensation45]

I will use 2sc3421 2sa1358 instead of mje172_182

 

[exwhyzed]

@ EVERYONE

This is a very exiciting prospect, getting the Bryston 4BSST sound at a fraction of the price, and getting to build it yourself!

So what's the update from those who have built them already. Are you happy with it? Any pitfalls that new builders should keep in mind? Anything you would have done differently? Is it recommended to buy the prepopulated boards or best to populate it yourself?

 

[Sensation45]

Wima 47pf

 

[exwhyzed]

Another Bryston 4B SST board

There appears to be another board on aliexpress called "Refer to Bryston 4B SST", but this board does not look like the ones that people in this thread are building.

Anyone have comments/insights onto this board?

 

[Sensation45]

4bsst

Onsemi bc550c bc560c matching paired for input vishay 4w 0.33r resistor

 

[Sensation45]

4b sst resistor 6 band

i started installing resistors

 

[Alexsandr1961]

Уважаемые коллеги, хочу попросить статистику. Клон был построен давно. В чем надежность продукта? Бывают случаи в сети их выхода из строя по причине выходных транзисторов одного плеча. Пожалуйста, сделайте обзор. Насколько важен точный подборных 21193-94.

 

[Sensation45]

Ero Mkp 1840 400v 100nf

 

[Sensation45]

 

[Sensation45]

I'm slowly collecting

 

[Alexsandr1961]

The input capacitor is directly bipolar 100mkf
C12, C13 are more convenient for the pins, for tuning.

 

[Sensation45]

Hi, I don't understand what you mean for c12 and c13? I used c12 c13 ero kp1830 100pf...

Panasonic 3w 100r s are ok too

 

[Alexsandr1961]

Miller correction Q11-Q12. Install on racks for adjustment

 

[Sensation45]

4w 0.33r direnç tamam

 

[Berlusconi]

Hi master of Diy. Can i use 2sc5200/2sa1943 pair like power amp for the 4B?

Pairs of MJL21193/MJL21194 are impossible to obtain. Also other similar MJL211.. alternatives are non-existent at the moment.
Has anyone tried 2sc5200/2sa1943,MJL4281A/MJL4302A or MJL3281A/MJL1302A? Are there problems due to the higher fT?
Any other alternatives?

 

[Alexsandr1961]

Discussion about exhaust transistors.
https://www.diyaudio.com/community/...tion-current-sharing-and-output-stage.306789/