DIY pass AlephJ using dual toshiba 2sj74 matched input jfets. Diyaudio boards that have adjustments for input stage bias, offset and output stage bias. Runs hot but reliably so. Dual mono, separate power supply channels for each channel. 250va hammond toroids with 4x2200uf for each channel - dual mono makes not only for no crosstalk but dead silent operation (no ground loop noise from amp). Single ended nature of Alephs present great holographic 3D sound stage - extends forward into space.

This listing includes the electronic components for building an Aleph J amplifier and it’s power supply. The power supply section is built, complete and ready to integrate with the included bridge rectifiers. Alternatively, the rectification section with discrete components is also included but not built. Nichicon caps are used throughout, and Wima caps when called for. Matched Toshiba J74B JFET from Diyaudio are included. Genuine ZTX450 diodes are included, sourced from Mouser. The AnTek AN-5218 with matching shield is the perfect power supply for the Aleph J, for either rectification method. Not included is a cabinet to mount the boards into, the RCA or XLR interconnects, or misc wiring accessories such as a star ground (if desired). There may be other small parts not included, this is the core electronics needed to get the Aleph J up and running. Please ask for more info or better photos for questions on what is included. Parts list: Line NumberMouser Part Number Customer Part Number Manufacturer Part Number Description Quantity OrderedQuantity Shipped 1 RoHS1 505-MKP41.0/250/10 MKP4-1.0/250/10 WIMA Film Capacitors US HTS:8532250070 ECCN:EAR99 COO:DE44 2 RoHS1 647-UFG1H221MHM UFG1H221MHM Nichicon Aluminum Electrolytic Capacitors - Radial Leaded US HTS:8532220020 ECCN:EAR99 COO:JP1212 3 RoHS1 647-UKZ2A100MPM UKZ2A100MPM Nichicon Aluminum Electrolytic Capacitors - Radial Leaded US HTS:8532220020 ECCN:EAR99 COO:JP1212 4 RoHS1 598-CD15CD050DO3F CD15CD050DO3F CDE Mica Capacitors US HTS:8532290020 ECCN:EAR99 COO:MX55 5 RoHS1 505-MKP20.1/100/5 MKP2D031001F00JSSD WIMA Film Capacitors US HTS:8532250070 ECCN:EAR99 COO:DE66 6 RoHS2 78-BZX85B9V1 BZX85B9V1-TR Vishay Zener Diodes US HTS:8541100050 ECCN:EAR99 COO:CN44 7 RoHS1 522-ZTX450 ZTX450 Diodes Inc. Bipolar Transistors - BJT US HTS:8541290075 ECCN:EAR99 COO:DE1010 871-RN60D-F-22.1K RN60D2212FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US1010 971-RN60D-F-4.75K RN60D4751FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US1010 1071-RN60D-F-562 RN60D5620FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US66 11 RoHS2 652-3296W-1-202LF 3296W-1-202LF Bourns Trimmer Resistors - Through Hole US HTS:8533408050 ECCN:EAR99 COO:CR44 12 RoHS2 652-3296W-1-102LF 3296W-1-102LF Bourns Trimmer Resistors - Through Hole US HTS:8533408050 ECCN:EAR99 COO:CR44 1371-RN60D-F-221 RN60D2210FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US1414 1471-RN60D-F-392 RN60D3920FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US33 1571-RN60D-F-1.0K RN60D1001FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US66 1671-RN60D-F-1.5K RN60D1501FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US66 1771-RN60D-F-3.32K RN60D3321FB14 Vishay Metal Film Resistors - Through Hole US HTS:8533210090 ECCN:EAR99 COO:US66 18 RoHS2 652-3296W-1-104LF 3296W-1-104LF Bourns Trimmer Resistors - Through Hole US HTS:8533408050 ECCN:EAR99 COO:CR44 PART: FEP30DP-E3/45GI-ND DESC: DIODE ARRAY GP 200V 30A TO3P MFG : VISHAY GENERAL SEMICONDUCTOR - DIODES DIVISION / FEP30DP-E3/45 COO : CHINA ECCN: EAR99 HTSUS: 8541.10.0080 ROHS3 COMP REACH UNAFFECTED 10-JUN-2022 Section 301 Tariff 2.78000 22.24 2.22 2 6 6 0 PART: WM15826-ND DESC: TERM BLK 3POS SIDE ENTRY 5MM PCB MFG : MOLEX, LLC / 0398900303 COO : ITALY ECCN: EAR99 HTSUS: 8536.69.4040 ROHS3 COMP REACH UNAFFECTED 07-JUL-2017 1.44000 8.64 3 4 4 0 PART: KC006L-ND DESC: ICL 10 OHM 25% 5A 19.56MM MFG : AMPHENOL ADVANCED SENSORS / CL-60 COO : USA ECCN: EAR99 HTSUS: 8533.40.8070 ROHS COMP 2.16000 8.64 4 4 4 0 PART: BC5194-ND DESC: CAP CER 3300PF 440VAC Y5U RADIAL MFG : VISHAY BC COMPONENTS / WKO332MCPCJ0KR COO : CZECH REPUBLIC ECCN: EAR99 HTSUS: 8532.23.0060 PART: HS347-ND DESC: HEATSINK TO-218/TO-247 W/PINS 2 MFG : AAVID, THERMAL DIVISION OF BOYD CORPORATION / 513201B02500G COO : INDIA ECCN: EAR99 HTSUS: 8473.30.5100 ROHS COMP 1.50000 12.00 6 4 4 0 PART: F2707-ND DESC: FUSE GLASS 3A 250VAC 5X20MM MFG : LITTELFUSE INC / 0239003.HXP COO : CHINA ECCN: EAR99 HTSUS: 8536.10.0020 ROHS3 COMP REACH UNAFFECTED 01-JUN-2018 Section 301 Tariff 1.21000 4.84 0.48

Paar Verstärkerplatinen nach dem Aleph-J-Schema, Klasse A, Leistung 30 Watt pro Kanal, doppelte Stromversorgung von 24-0-24 VDC, ein Transformator mit Sekundärspannung von 20-0-20 VAC, 300 VA wird empfohlen. verkaufe zwei kalibrierte und funktionierende platinen wie auf dem foto zu sehen. free ship..-------------------------------------------------------------------------- Pair of amplifier boards according to the Aleph-J scheme, class A, power 30 watts per channel, double power supply of 24-0-24 VDC, a transformer with a secondary voltage of 20-0-20 VAC, 300 VA is recommended. sell two calibrated and working boards as seen in the photo. free ship.. ------------------------------------------------------------------------- Coppia di schede amplificatrici secondo lo schema Aleph-J, classe A, potenza 30 watt per canale, doppia alimentazione 24-0-24 VDC, consigliato trasformatore con tensione secondaria 20-0-20 VAC, 300 VA . vendo due tavole calibrate e funzionanti come si vede in foto. consegna gratuita..