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F5 pcb group buy...

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#602
EUVL said:
Looks like the mounting angles and the bottom / top plates are made from galvanised steel and partly power coated.
Am I correct ?
Click to expand...
Thanks for your compliments, one of my first aims was to separate AC power wires from signal ones, and placing power transformers away too. The other was to separate small signal from power output to avoid oscilations.

yes, it is an HI-FI 2000 case. What I'm not sure if about the galvanized steel, I would say yes but I am not an expert in materials. Even don't know what is a powder coated steel or how does it look like.
Attached is another case I bough for my last project. I strongly reccommend this manufacturer if you are looking for a very solid and resistant enclosure.

Regards,
Regi
 

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#608
TheShaman said:
Patrick and JBdV are both right.

On some product lines they use more Alu parts - you can tell by the price. 😉
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Yeah, I said I wasn't sure about the exact composition of the tray, but for sure it is NOT alu, it has to be steel. As Patrick said, you can check the materials here:
modushop.biz
I will try later the magnet checking

Spev, don't be afraid about modushop's for an F5. Just take the Pessante Dissipante 4U or 5U height. 3U is not enought, specially if you are placing a discrete diode bridge of 8 devices in each heatsink as me. Take the 5U one, you wont regret and you will be able to bias it higher than 1.3A. You can even choose a deeper case (400mm instead of 300mm).

I hope this helps,
Regi
 
#609
I have tried with the magnet from a speaker I had lying around, and Patrick's assumptions were correct; The tray, the mounting angles, the top and bottom cover and the back panel are pulled from the magnet (well, the other way around in fact 🙂 while the front panel and heatsinks don't.
Didn't mind about it, but now I can see that this makes a quite strong chassis. When you hold it, feels like you cannot break it even if you throw it against the wall 😀
 
#615
What are your speakers? Full range or multi-driver.
The bass driver is likely to have to pass any DC output offset.
The Mid and Treble drivers are very likely to have a capacitor that provides DC protection (if the rating is high enough).
The capacitor can be a film type for both these passband frequencies

Are you planning to use your 27W ClassA amplifier to drive the bass speaker?
 
#617
Multi driver. My bass drivers have passed DC in the past and didn't take too kindly to it 😉

Amp would drive the whole shebang.

Good point Jan, and precisely what i have in my amp at the moment given its previous meltdown...
 
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