A standard F5? Yes, absolutely. The amp I built in the link that you see below in my signature line was made in a hifi2000 4U 300mm.
Just ordered a 'jack of all chassis' for the F4 I'm building with diyaudio boards.
I'm happy to support diyaudio and hope this works out for you folks. As you've already said the chassis is one of the most troublesome parts of a build for some of us and I'm glad to have someone do most of the dirty work for me. I have only tried drilling/tapping heatsinks once and ended up breaking the tap. Fortunately the heatsinks I had offered a clamp type mount and I switched to that but the F4 board is too wide for the clamp so I was faced with drilling/tapping again...until now.
Thanks again and now I can concentrate on the part of the hobby I like the best....electronics, and listening to music.
Phil
I'm happy to support diyaudio and hope this works out for you folks. As you've already said the chassis is one of the most troublesome parts of a build for some of us and I'm glad to have someone do most of the dirty work for me. I have only tried drilling/tapping heatsinks once and ended up breaking the tap. Fortunately the heatsinks I had offered a clamp type mount and I switched to that but the F4 board is too wide for the clamp so I was faced with drilling/tapping again...until now.
Thanks again and now I can concentrate on the part of the hobby I like the best....electronics, and listening to music.
Phil
West side hit it yesterday afternoon and we sold a few more! All survey respondents have now been emailed as well. We've sold 6 of the 4U and 5 of the 5U. We actually started with 20 of the 4U and 25 of the 5U, so there's 14 and 20 remaining respectively. No problems there at all. I've raised the limit from 1 to 2 per order, so those who want dual monoblocks can secure a pair, and in another 24 hours I'll remove the limit entirely.
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Hi,
You will run out of space pretty quickly with that setup but with a bit of planning I think you can squeeze them in a 4U. The PSU boards will have to be mounted vertically so you will have to device a way to do so, this is done to make room for the two toroidal transformers and soft start pcb.
But ultimately, if it's going to be a power plant amp build then I would strongly suggest to get the bigger, deeper chassis.
HTH
Jojo
In our test setup, biased at 1.3 amps per channel, it never got more than 20'C above ambient.
All restrictions have now been taken off ordering and the chassis will shortly be made "public".
Hi James,
Here's the HB Amp in the 5U chassis with dual PSU and an 800VA toroidal transformer.
Attachments
Not sure if I should post here or in the BA-3b thread....I would love to use the 5U for a BA-3b monoblock with either the SE or PP output. I see that the chassis is pre-drilled for the output boards. I am wondering about the ability to dissipate the heat. I see from the first post that the chassis is 0.28C/W. Is that per Chassis or per heatsink?
Just above the spec they describe the big chassis as:
"A 5U, 400mm deep “Big *** Chassis” with towering walls of heatsinking to cool demanding class A projects such as F-5 Turbos, Burning Amps, multichannel amps for biamping and home theater, and amps with elaborate power supplies and other components that that require a lot of internal space"
The Rth = Tr/Ph = 25C/300W = .083C/W. The BA articles generally state that a stereo chassis may draw as much as 300W from the wall.
Any opinions are welcome.
Just above the spec they describe the big chassis as:
"A 5U, 400mm deep “Big *** Chassis” with towering walls of heatsinking to cool demanding class A projects such as F-5 Turbos, Burning Amps, multichannel amps for biamping and home theater, and amps with elaborate power supplies and other components that that require a lot of internal space"
The Rth = Tr/Ph = 25C/300W = .083C/W. The BA articles generally state that a stereo chassis may draw as much as 300W from the wall.
Any opinions are welcome.
It's going to be somewhat tight for a HB system in there but definitely not impossible. You can even install the PSU board by fabricating an angled sheet aluminum and install that to the base. That way the PSU is installed vertically eating less real estate space.
Iirc, the spec was per heatsink, per side. But to be honest, I am not quite sure of the thermal resistance rating. All I can tell you right now is that the 5U's heatsinks are, aside from being big and all that, ribbed to increase surface area. It's always a good sign for use with demanding systems.
and then apply the deltaT De-rating Factor (DF)
For a deltaT of 21Cdegrees expect the de-rating to be around 1.3 **
Temp rise = Pq * Rth s-a * DF = 75 * 0.28 * 1.3 ~ 27Cdegrees.
** The De-rating Factor should be given by the manufacturer. They usually have a datasheet showing how to apply it.
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