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Old 3rd December 2019, 02:00 PM   #2711
Eric is offline Eric  United States
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Aleph-X builder's thread.
All varieties of this amp use an identical PCB. If you opt for the original 15w version, just stick one mosfet in each corner of the board and you're all set. If you want higher power, you need to parallel the mosfets and use the "Ext" pads on the pcb to do your own wiring off-board.
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Old 3rd December 2019, 02:04 PM   #2712
Villaw is offline Villaw  Cyprus
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All varieties of this amp use an identical PCB. If you opt for the original 15w version, just stick one mosfet in each corner of the board and you're all set. If you want higher power, you need to parallel the mosfets and use the "Ext" pads on the pcb to do your own wiring off-board.
I guess this is what I'll do. I was trying to avoid point to point wiring for stability purposes given the high bias currents used but I guess this would be unavoidable.
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Old 3rd December 2019, 02:04 PM   #2713
Dennis Hui is offline Dennis Hui  Canada
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Aleph-X builder's thread.
Nick,

Have a look at Zen Mod's XJ:

Babelfish XJ , or JX .. or whatever (Aleph X servo for Greedy Boyz)

Pretty sure it can do the power level you like. You can try contacting him to see if he may
have some boards available.

Dennis
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Old 3rd December 2019, 02:07 PM   #2714
Villaw is offline Villaw  Cyprus
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thanks Dennis !
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Old 3rd December 2019, 02:09 PM   #2715
Eric is offline Eric  United States
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I understand your concern - I had that same thought as I was building mine. I wired my parallel mosfets together with 12g solid core 8" "pigtails" that are used for grounding household electrical sockets and wired these directly to the caps in my PSU with 12g stranded wire. Then, I just ran a separate run of smaller gauge wire from the PSU to the circuit board. This way, everything gets its power, but the output stage is wired with heavy wire.
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Old 3rd December 2019, 02:12 PM   #2716
Villaw is offline Villaw  Cyprus
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I understand your concern - I had that same thought as I was building mine. I wired my parallel mosfets together with 12g solid core 8" "pigtails" that are used for grounding household electrical sockets and wired these directly to the caps in my PSU with 12g stranded wire. Then, I just ran a separate run of smaller gauge wire from the PSU to the circuit board. This way, everything gets its power, but the output stage is wired with heavy wire.
If yours was stable enough then I guess this is sufficient proof for my impending design as well, thanks.
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Old 3rd December 2019, 02:18 PM   #2717
Eric is offline Eric  United States
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Aleph-X builder's thread.
Yep, been running 125w monoblocks for about 10 years now. I'd call them plenty stable.
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Old 3rd December 2019, 02:19 PM   #2718
Villaw is offline Villaw  Cyprus
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Yep, been running 125w monoblocks for about 10 years now. I'd call them plenty stable.
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Old 5th December 2019, 09:06 PM   #2719
wuffwaff is offline wuffwaff  Netherlands
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Yes,

very stable running since 2005
No problems, not even with the added servos.

William
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Old 6th December 2019, 05:34 AM   #2720
Villaw is offline Villaw  Cyprus
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Yes,

very stable running since 2005
No problems, not even with the added servos.

William
Cheers William
Looks like I am 15 years behind. Quite typical for my life's ventures !
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