italian style
 

Stee italian Style
 

CEFP
CFP + EF Output Stage

better use NTE37MCP as Final

NTE36(NPN) + NTE37(PNP) Matched Complementary Pair

TOSHIBA 2SA1930 + 2SC5171 as driver

Chet Amp application
 

see this complete schematic :rolleyes:

congratulations on the excellent project which the values of bias adjustment to 60ma. I can change the value of
R109 = 470r for trim-pot for 1k to set off-set.:att'n:

Thanks a lot Beto
 

now there is version 2
ready to test :) :cool: ;)

http://www.esafono.it/rotel.pdf

The first circuit is simply Musical Fidelity's A1 power amplifier redrawn, without component values.

The "Chet Baker" Amp is a Rotel clone with a slightly different output stage - the graphics used for the schematic, style of compensation, plus the choice of transistors is identical to many Rotel service manuals.

The Chet Baker schematic has a Bryston style output, which can be tricky to keep stable.

One thing the 0.22 resistors in the collectors of the CFP output devices serve no purpose. I think they should be moved to the emitter side.

I'm interested to hear if it works

Thanks Symon
 

can you post a Bryston style output schematic example?

see the source of this idea:

http://www.esafono.it/ccc.pdf

there used to be a technical description on hte bryston web site, but can't find it right now.

take a look around the site.

Bryston Technical

this is the schematic of a Bryson amplifer

Bryston Schematic


You can also find discussion on Bryston amplifiers here on DIYAudio ..

In the original project could not a good result
modified some parts in the scheme to operate the simulator see the components changed:
R103 and R113 = 47k
R115 connecting a capacitor of 220uf to the ground.
R127 = 2k
Vr103 = 1k
R125 = 1k
q107 put capacitor 22pf of B / C.