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Aleph J illustrated build guide | diyAudio
https://www.diyaudio.com/community/threads/aleph-j-illustrated-build-guide.241729/
Aleph J chassis guide. This guide shows some construction of photos using the DIYaudio store 5U "Big Amp Chassis" with the additional bag of hardware. The 4U Chassis will also be appropriate for this amp. The best place to begin is assembly of the heatsinks, which also form the sides of the enclosure.
Aleph J | diyAudio
https://www.diyaudio.com/community/threads/aleph-j.272699/
It's a DIY Aleph J. Test Rig setup is an IsoVariac, multimeter, scope and 4/8 ohm dummy resistor with bnc bung. At first glance, it had puffy filter caps (4 of 6 22mF 25V), two manilla circuit boards, and heat stress around the power mosfets.
Aleph J Kit | diyAudio
https://www.diyaudio.com/community/threads/aleph-j-kit.377220/
Aleph J Kit | diyAudio. These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a ...
Aleph J ? | diyAudio
https://www.diyaudio.com/community/threads/aleph-j.334073/
Paid Member. 2000-10-08 1:19 pm. Melbourne. www.diyaudio.com. 2019-02-19 5:33 am. #3. 2019-02-19 5:33 am. #3. There is now a small number back in stock.
Aleph J illustrated build guide | Page 243 | diyAudio
https://www.diyaudio.com/community/threads/aleph-j-illustrated-build-guide.241729/page-243
If your PSU design accommodates individual TO-220 rectifiers with 3 legs, as for example the Universal Power Supply PCB in the diyAudio store does, then the Field Effect Rectifiers from ST Microelectronics are appealing. Their forward voltage drop is amazingly low, thus they dissipate far less...
Aleph J illustrated build guide | Page 409 | diyAudio
https://www.diyaudio.com/community/threads/aleph-j-illustrated-build-guide.241729/page-409
In post#3 of this thread, 6L6 pointed the 4ohm resistor 1,000 Hz will resulted 18 watt per channel with offset at 400mV. From firstwatt.com Aleph J page, it shows 4ohm => 15 Watt. My speakers ranges from 3.2 (300-400Hz) to 12.3Ohm through spectrum of 50-15,000Hz. It averages 5.6 and focus around 4ohm at vocal range.
Aleph J Transistor Kit – diyAudio Store
https://diyaudiostore.com/products/alephj-transistor-kit
All the devices worked. I measured the Vgs of the IRF240 and they were well matched between 3.45V and 3.49V. However, not sure about the transconductance as near equal drain currents did not a result with the Aleph J even though the source resistors were close tolerance. By trying varying combinations I eventually matched currents within 5%.
Aleph J MOSFET and JFET kit – diyAudio Store
https://diyaudiostore.com/products/aleph-j-mosfet-and-jfet-kit
Included in this kit are the following semiconductors needed to complete an Aleph J amplifier. This kit provides for 2 channels (one stereo amplifier). MOSFETs and JFETs were graded and matched specifically for use in the Aleph J by expert hands. Kit Contents: 8 x IRFP140/240 N Channel MOSFETs (all 8 are matched to wit
DIY Aleph J: A Build Guide
https://diyalephj.blogspot.com/
The Aleph J is a low-power (25 watts into 8 ohms), single-ended, class A, solid-state, stereo amplifier dreamt up by legendary amplifier designer, Nelson Pass . Originally produced as a commercial product by First Watt , Mr. Pass subsequently invited hobbyists to build their own, contributing schematics and know-how in the DIYAudio forums.
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