The Very Best Amplifier I Have Ever Heard!!!!

Jump to Latest
Nikos

Nikos

Member
Joined 2009
Golmund clone

zsolek said:
"(E) T11 0.6 V (E) T12 - 0.28V" only 0.88v to open "BIASED" the two MOSFET final stage seems a little, I think your amplifier works in class B. Acording by datasheet SK134,SJ49 Gate-source cutoff voltace 1.45v u. need measured around T11 E+1.45V, T12 E -1.45V for running class A-B. thermal stability remain good questions,ideally u need R20 combination or replaced with super diode circuit, Mosfet output stage and equaly biassed around 50mA for all devices. good luck.
Click to expand...

Does anyone knows the official the value of bias mimesis 9.2 ?
With R20 330Ω gives 0.6 V - 0.28V on gates for P-N devices and about 30-40mA for each device. My devices are EXICON. +/- 70 V rails.
Regards Nikos
 
alex mm

alex mm

Member
Joined 2006
schematic

@Algar_emi schematic lost in time ..... :) PDF schematic was drawn acording this hand ......
Regards,Alex
 

Attachments

  • scan0002.jpg
    scan0002.jpg
    66.4 KB · Views: 1,158
  • OPAmp.jpg
    OPAmp.jpg
    53.9 KB · Views: 1,126
  • scan0001.jpg
    scan0001.jpg
    82.7 KB · Views: 1,106
  • Protection2.jpg
    Protection2.jpg
    46.3 KB · Views: 1,066
  • Protection.jpg
    Protection.jpg
    20.6 KB · Views: 952
  • NAGYSAUDIO SCHEMATIC.pdf
    48.1 KB · Views: 396
Last edited:
Nikos

Nikos

Member
Joined 2009
tommy1000 said:
Have a look at post #677. I can confirm that "R20" was set to 270 ohm on the MM9.2 with A2 module and 300 ohm with A1 module.
Hope this helps
Click to expand...

Tommy thanks for your responce
But i want practical answer if someone measure the current idle .If 100ma for each device 300mA total for one rail with 4700mf/100V......
my devices TO3 EXICON 200V with +/- 70V rail needs 390-410 Ω R20 for 100mA but the balance of Vas need lower R19-22 about 13.5-14kΩ.
 
Last edited:
Nikos

Nikos

Member
Joined 2009
Hi Kris
I'm afraid not.
 

Attachments

  • Amp Goldmund Mimesis 1b.JPG
    Amp Goldmund Mimesis 1b.JPG
    726.7 KB · Views: 663
  • 278073_10150907159188182_1177175860_o.jpg
    278073_10150907159188182_1177175860_o.jpg
    272.3 KB · Views: 347
  • 194875_10150907158923182_487473385_o.jpg
    194875_10150907158923182_487473385_o.jpg
    309.5 KB · Views: 254
  • 169265_10150907158743182_2000921128_o.jpg
    169265_10150907158743182_2000921128_o.jpg
    324.8 KB · Views: 229
  • 57094_10151147449573182_1583282198_o.jpg
    57094_10151147449573182_1583282198_o.jpg
    336.5 KB · Views: 242
Last edited:
Nikos

Nikos

Member
Joined 2009
Goldmund 9.2

Oh!!! my God
Now really is the best amplifier I've heard but stable and that I have constructed. The difference now is placing a special power supply front end.
Very stable +-/ 84V with ripple 1 mV under load 0.031A
Ready to run all the time.
offset now +-/ 1-2 mv.NO SERVOOOOOOO!!!
100mA for each mosfet device
Nο flicker by temperature at all.
NO flicker because of main voltage 220V~
Unlike the previous power supply front end multiple capacitance fliker !! fliker !!
No noise at all with my ear on my speaker woofers.
On resistors R14 and R15 3025mV and 3025 mV stable under full load and no flicker.
Nikos.
 

Attachments

  • P040114_20.150001.JPG
    P040114_20.150001.JPG
    422.8 KB · Views: 1,114
  • P110414_21.090001.JPG
    P110414_21.090001.JPG
    493 KB · Views: 1,063
  • P110414_21.080001.JPG
    P110414_21.080001.JPG
    367.9 KB · Views: 994
  • P110414_21.090002.JPG
    P110414_21.090002.JPG
    558.5 KB · Views: 968
Last edited:
W

Walkalone

Member
Joined 2011
sajti said:
It's much better!

Sajti
Click to expand...

I've tried both. Telos and Mimesis.
No, Goldmund Mimesis's sounding is better.
Goldmund Telos have sound more detail, this's will become ''dirty'' with bad recordings.
The Mimesis have more sweet, smooth. Sound is the game of the balance.
Problem is the quiescent current of LTP. Telos is 4.6mA, Mimesis 2mA.

// @: Hien.T.Nguyen:
Nice to see you in here. Are you fine?! A Long time ago...
 
Last edited:
You must log in or register to reply here.
Top Bottom