Hi
Here’s some pictures of my F3.
I had the heatsinks already from a member here and my friends provided the ventilated top, bottom. I then worked on the back and front pieces. The front is 10mm aluminum that I worked on to get the brushed effect, I’m happy with the results. I have used 1 SMPS per channel (200W each), one on top of the other with the added SMPS filter from the diyaudio store on each channel. It’s quiet as a mouse and I’m loving the sound. AC current gain set to 50%.
Bias is 1.7A therefore each channel dissipate about 75W, heatsink are at about 45C after 2h and stable.
It was a long build considering the case wasn’t bought ready made but I really enjoy the whole process, fun factor to the roof.
Eric
Here’s some pictures of my F3.
I had the heatsinks already from a member here and my friends provided the ventilated top, bottom. I then worked on the back and front pieces. The front is 10mm aluminum that I worked on to get the brushed effect, I’m happy with the results. I have used 1 SMPS per channel (200W each), one on top of the other with the added SMPS filter from the diyaudio store on each channel. It’s quiet as a mouse and I’m loving the sound. AC current gain set to 50%.
Bias is 1.7A therefore each channel dissipate about 75W, heatsink are at about 45C after 2h and stable.
It was a long build considering the case wasn’t bought ready made but I really enjoy the whole process, fun factor to the roof.
Eric
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I have a few 100aH AGM batteries since I converted my travel trailer ti Lithium.....I'm going to use them through a Bucking device to stabilize the voltage to 24V to power an ACA Mini.......Thanks for the idea!
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Here is the story that goes with the F5 ... http://rvbprecision.com/stereo/nelson-pass-first-watt-f5-turbo-v2.html
Beautiful build Robert, love the creativity. You are definitely good to <=25VDC.
I’m certainly not the first to try this and I’m hooked on battery powered now. I’ve got F3 boards and devices, so those are next up.
This is one of those things though that makes such a difference that any single rail circuit should be quickly tried.
The One Day Wonder!...The Nelson Pass ACA Mini is done and playing through a set of Fluance speakers. Driven by a Schiit Freya with a WiiM PRO streamer and Topping DAC......Sounds pretty amazing. More listening is required. A real fun project....Started around 9AM...Finished at 9PM.....Amazing how much volume through the Fluance speakers. I want to be sure it doesn't do anything funny before I connect it to the KEF and Magnapans.....
Pass Aleph J cobbled together from recycled parts.
Yes, I cannot hear them from my listening post and the speed can be adjusted to taste. Really the larger CPU heatsinks and esp. the high end ones are designed for low noise. These heatsinks came out of a computer that was liquid damaged so I salvaged them and finally repurposed them for Aleph J build.
Very nice and original concept.
To avoid someone being zapped I would recommend adding a ventilated cover above your 2 switching power supply.