The modified C-Class Sixteen model of the Harman card company in 1976 is able to deliver 400 watts of power through a 4-ohm speaker with an AB class Amplifier circuit . The power transistors 2SC5200 and 2SA1943 use the TL072 opamp in the 400w anfi circuit. The OPA2134 opamp is said to be of better quality available but the price is high …
400W Amp circuit diagram
Features of the 400W Anfi circuit
250W power output with 8 ohm speaker
400W power output with 4 ohm speaker
+ 26dB / + 33dB gain
– Frequency response 10Hz-100KHz +/- 0.5dB ( multisim simulation result )
THD @ 1kHz <0.01% ( multisim simulation result )
DC Offset output is lower than 50mV
The ammeter’s power supply is symmetrical + 75v -75v DC capacitor for the filter layer is prepared with pcb 35 amperes bridge diode is mounted in the amplifier chassis used transformer 2X52V AC output power should be at least 850VA
Be very careful when making circuits and the quality of the materials used will be better if their quality is high. For the first test, the transformer input must be connected to the transformer input for the first time. If there is no problem when the power is supplied, connect the DC voltmeter to the output without giving an audio signal to the input. Set the trimmer until the value is less than 50mV or 50mV.
The writer noted that if everything is true and the voltage is too high than 50mV, the opamp needs to be replaced.
ATTENTION Be careful with the capacitor high voltage circuitry + – Be careful with the capacitor connections + Reverse polarity may cause large explosions at high voltage Fuse Power Line,
Source: evensaudio.com/news/100168/101692
FILE DOWNLOAD LINK LIST (in TXT format): LINKS-25955.zip
Published: 2018/06/09 Tags: audio amplifier circuits, transistor amplifier
Verstärkerschaltung 400W Harman-kardon
Das modifizierte C-Class Sixteen-Modell der Harman Card Company aus dem Jahr 1976 kann 400 Watt Leistung über einen 4-Ohm-Lautsprecher mit einer Verstärkerschaltung der AB-Klasse liefern. Die Leistungstransistoren 2SC5200 und 2SA1943 verwenden den Operationsverstärker TL072 in der 400-W-Anfi-Schaltung. Der OPA2134 Opamp soll von besserer Qualität sein, aber der Preis ist hoch …
400W Ampere Schaltplan
Circuit amplificateur 400W Harman kardon Clone modifié
Le modèle C-Class Sixteen modifié de la société de cartes Harman en 1976 est capable de fournir 400 watts de puissance via un haut-parleur de 4 ohms avec un circuit amplificateur de classe AB. Les transistors de puissance 2SC5200 et 2SA1943 utilisent l’ampli op TL072 dans le circuit anfi 400w. L’opamp OPA2134 serait de meilleure qualité mais le prix est élevé…