Modulus-86 Gainclone

[Mikorist]

Slučajno naleteh na ovo...

Circuit Description

The Modulus-86 Rev. 2.3 is a composite amplifier providing true world class performance. This performance level is reached by using a specialized audio op-amp to perform error correction on a high-power chip amplifier. This Neurochrome composite amplifier topology results in a high-performance 65 W amplifier with vanishingly low distortion and phenomenal sound quality.

The Modulus-86 is a turnkey analog subsystem. It requires no adjustments and it achieves state of the art performance using readily available off-the-shelf parts. The Modulus-86 uses one channel of an LME49720 precision audio op-amp to perform error control on an LM3886 power amplifier. An OPA2277 precision op-amp is used as a high-end DC servo with third order filtering for an ultra-low output DC offset and fast settling time. The DC offset is less than 200 µV and is reached within ten seconds of power-up. A THAT1200 differential receiver provides common-mode rejection rivaling that of a line transformer, thus, minimizing hum injection by eliminating ground loops in the signal path.

The Modulus-86 is power supply agnostic, which is a unique feature to the Modulus-86. Due to the error correction provided by the Neurochrome composite amplifier topology, the Modulus-86 performs as well on a traditional unregulated linear power supply or a switch mode power supply (SMPS) as it does on a well-regulated laboratory power supply.

Key features of the Modulus-86 Rev. 2.3:

70 W (4 Ω), 40 W (8 Ω) output power when using the Power-86 and recommended transformer.
Mono construction: One Modulus-86 board per channel.
On-board error correction circuit with local low-noise power supply regulators.
Ultra-low 0.000054 % (-125 dB) THD (1 W, 8 Ω, 1 kHz).
Ultra-low 0.000088 % (-121 dB) THD (40 W, 8 Ω, 1 kHz).
Ultra-low 0.00042 % (-108 dB) THD+N (40 W, 8 Ω, 1 kHz).
Differential input with nearly 90 dB CMRR eliminates hum and ground loop issues.
Differential/balanced/XLR input can be used with single-ended/unbalanced/RCA sources as well.
Power supply agnostic. The phenomenal power supply rejection ensuring consistent, high performance even with unregulated power supplies and switch mode supplies.
Ultra-low -120 dB inter-channel crosstalk in stereo builds greatly simplifies the power supply requirements.
Elaborate use of planes and copper pours to maximize circuit performance by minimizing supply and ground impedances.
Low-inductance signal ground connects to power ground at one point only for maximum performance.
On-board Zobel and Thiele networks for maximum stability even with capacitive loads.
On-board EMI/RFI input filter and ESD protection.
Power and output terminal blocks accept wire sizes up to AWG 10 (5.2 mm2).
All thru-hole construction with socketed ICs. Easy to solder. 90 × 70 mm board footprint.
Bill-of-materials includes a Mouser Electronics Project Link for ease of parts ordering.

https://www.neurochrome.com/modulus-86/

bolest 

 

[Mikorist]

Ja ovo mora da nabavim (ili je možda samo ideja nekome ko ne zna šta će da sklapa)

https://www.neurochrome.com/product/modulus-86-4/

Ovo je Gainclone ??

[Mikorist]

kako izgleda gotovo

[Mikorist]

Delovi sa gornje slike

Antek AS-2222 200va 22v transformer: http://www.antekinc.com/as-2222-200va-22v-transformer/

Shielded IEC connector with power switch and fuse

Power-86 https://www.neurochrome.com/product/power-86-2/

Neutrik XLR

 

Hifi2000 case https://www.modushop.biz/site/index.php?route=product/product&path=204_205&product_id=725

 

Ima varijanta sa drugim napajanjem

https://www.neurochrome.com/product/smps-86-2/

 

plus može da se doda softstart

 

https://www.neurochrome.com/product/iss-intelligent-soft-start-2/

 

[aaa zmaju!]

2 hours ago, Mikorist said:

Ja ovo mora da nabavim

ma bolje nabavi ovo

https://www.diyaudio.rs/topic/9079-batomm-komplet/

[Mikorist]

Imaju skoro isti oscilogram. nije šija nego je vrat

[Bajlag]

To su sve kompozitni pojacavaci, sto bi znacilo 2 opampa u red, pa povratna sprega. Dobije se preko 100dB povratne sprege koja tu ispravlja sta ispraviti moze.

Naravno ako izlazni tranzistor moze da isporuci 5 Ampera, 100dB povratne sprege ne mogu da poboljsaju situaciju. :)

Walt Jung je radio na popularizaciji tog koncepta u svojim publikacijama, mislim da je i Wurcer nesto piskarao svojevremeno na tu temu.

Po meni to je super koncept za 2 way male aktivne monitore.

 

[Mikorist]

Ja sam za to da neko osmisli kompozitni AMP sa SIT tranzistorima na izlazu. Evo Zen kad se vrati sa odmora. 

[Impuls]

Mislim da je jako slicno BatoMM resenju i nema potrebe bacati par na to. ja bih pe uradio balansirano sa 3875 sa plocicama od Peter Daniela

[Mikorist]

8 minutes ago, Impuls said:

Mislim da je jako slicno BatoMM resenju i nema potrebe bacati par na to.

I ja mislim. No ima na onom sajtu dosta toga mi se sviđa. 

Ovo napajanje recimo bi išlo i na jedno i drugo odjednako 

https://www.neurochrome.com/product/smps-86-2/

[Bajlag]

55 minutes ago, Impuls said:

Mislim da je jako slicno BatoMM resenju i nema potrebe bacati par na to. ja bih pe uradio balansirano sa 3875 sa plocicama od Peter Daniela

LM3875 su prestali da stancaju, 3886 jos zivi.

[Bajlag]

50 minutes ago, Mikorist said:

I ja mislim. No ima na onom sajtu dosta toga mi se sviđa. 

Ovo napajanje recimo bi išlo i na jedno i drugo odjednako 

https://www.neurochrome.com/product/smps-86-2/

Skupo to bre Miko, za 200 dolara kupis kilovatni trafo i 100k elektrolita.

Napravis ozbiljan amp.

 

[vladd]

Ili dva laptop napajanja.

Pride sto bih povadio sve te luster kleme, kao da je zalemiti par zica na plocu problem, a kasnije ce se svaki cas skidati..

Razumeo bih da je modul zaliven, ali lusterka na golu stampu, a ne demontira se svakicas, bezveze..

U svakom slucaju, BatoMM je za nijansu specificniji pojacavac, zbog most konfiguracije, i prakticno veceg odvajanja energetske mase od signalne, grubo receno.