Clone Goldmund Amplifier

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
I like Goldmund Amplifier

I done clone this amplifier
 

Attachments

  • 1a.jpg
    1a.jpg
    75.6 KB · Views: 5,606
  • 1b.jpg
    1b.jpg
    78.9 KB · Views: 5,261
  • 1c.jpg
    1c.jpg
    78.9 KB · Views: 4,933
  • 1d.jpg
    1d.jpg
    76.7 KB · Views: 4,786
Waw !!
What about the sound ?
I'm not jealous ;-)
What was the full cost of the project, and do you think of providing DIY Kits for us someday ??
Hi bazouka

I try to use components on the circuit is the best.
The price of this amplifier is not very high

I can not buy MOSFET Goldmund 10N20 and 10P20, but instead I found with 2SK2221 and 2SJ352
Power diode: I use STTH6002, it differs Goldmund
Opam:I used AD 811,AD797,AD706J-SMD,AD586JN,OPA134,OPA2134,...
BJT: 2N5551,2N5565,FZT857,FZT957,...
Capacitor: Philips BC, Vishay BC,Wima,...
Resistor: Dale, SMD-MF(Panasonic).
Mosfet 8 pcs/1 chanel
Power transformer: 1000W
....

:D
 
Last edited:
the opamp replaces the second transistor of a two transistor CCS.
The chip before the opamp is monitoring other signals and using those to control the output of the opamp.
The chip could be monitoring,
start up,
output offset,
internal temperature,
heatsink temperature,
input offset,
oscillation,
excessive current,
loss of AC power, etc.

If any of these showed as a potential failure mode the opamp would starve the CCS and effectively switch OFF the input pair.
 
the opamp replaces the second transistor of a two transistor CCS.
The chip before the opamp is monitoring other signals and using those to control the output of the opamp.
The chip could be monitoring,
start up,
output offset,
internal temperature,
heatsink temperature,
input offset,
oscillation,
excessive current,
loss of AC power, etc.

If any of these showed as a potential failure mode the opamp would starve the CCS and effectively switch OFF the input pair.

CCS of Goldmund Telos 5000: ADR455BRZ + OPA134UA + 2N5551(x2 pcs)
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.