UCD180 questions

[ewildgoose]

Yeah, but I want to see inside *your* amp since it's the same case as I have!

[matjans]

the first link in my previous post is *my* amp.

To be recognized by the messy wiring

[UrSv]

Originally posted by ewildgoose
Yeah, but I want to see inside *your* amp since it's the same case as I have!

And me as I have the same as matjans...

Although it seems those are 280 mm depth but mine are 230 mm depth, hence the space issue...

[ewildgoose]

Originally posted by matjans
the first link in my previous post is *my* amp.

Oh, I see! Sorry about that, looked only at the second link...

Yes, that is what I thought you must have done. Did you just glue them on to the outsides then?

How warm do the sides of the case get when it is running full tilt?

[I need quite a few of these amps and was hoping to stack them in close proximity to each other. On my Zappulse I used a sheet of Alu on the base, which is attached to the steel bottom and they have trouble dissipating all the heat (it gets about 50-60C on the top side of the case). I am curious as to whether by attaching them to the sides which are Alu of this case you keep the temp *easily* under control, or *only just* under control? Basically, once I stack 4 of these on top of each other and then put them in an equip rack with a door (to keep the baby out), then I don't want them to melt...]

UrSv: What is the spec of your powersupply? I see two torroids - do you find the double torroids makes a useful difference? What rating are they?

(I was going to get single 500-800Va for each stereo amp, but then I saw the small price incremental on the 1000Va ones, so was considering one of those. However, farnell have encapsulated 500Va transformers and I was curious as to whether these might be better for our application?
http://www.farnell.com/datasheets/38565.pdf )

Thanks

[UrSv]

They are 160 VA each. The reason for using two is as simple as it wouldn't fit otherwise...

[stef1777]

Originally posted by matjans
finally finished the casework ...
the top case is just a source selector and volume pot, i still have to build a decent pre.



why isn't the image being shown? i did enclose the link in img tags !?

Hi!

Is it a Galaxy box?

What's the temp inside?

[matjans]

yes it is a galaxy case (23x28) and yes,, they're bolted to the sides of the case.

haven't done any temp measurements (i will, gotta get a digital thermometer for that) but the sides stay pretty cool. lukewarm, no more. At normal listening levels, that is. Haven't tried full tilt for an hour or so but that's undoable. And my speakers aren't really that sensitive (89dB).

Heatsink temperature is not so much of a problem. It's harder to get the air-temp inside the case under control. The coil gets pretty hot.

I'll try some bass heavy music next at somewhat louder levels.

Looks like the audiokit galaxy cases are going to be the standard eh?

[ewildgoose]

Yes, the Galaxy are nice cases, although ordering them from Audiokit is a complete pain... My last ones took about three weeks including the re-order when they arrived all battered and twisted (the muppets sent them in a "large envelope" and as you might expect the shippers bounced all the corners until they were round...)

The price is good, but shipping is quite expensive. They are very good and will talk english to you, but it's clearly a second language, so you must expect a slower response than if you can write Italian.

They have lots of other nice stuff as well though!

Ed W

[stef1777]

Ok, can you give me the real internal size for the GX288?

I've a project to build one in the GX248 box (same box but only 40mm height). One box per UcD module.

I've found a supplier for a 2 x 32V 180VA tor transformer with only 37mm height (with fix kit). The price is same of one good 300VA.

Curently all my size simulation seems fine. I'm just afraid of the temp.

If not working, I'll switch to use a GX288 box as you but with a 300VA.

[matjans]

it took my cases about two weeks to get to me. And that wasn't audiokit's fault. The dutch postal service decided to deliver the cases to some other guy called m. janssen on a different address.

if he hadn't sent audiokit an email i still wouldn't have had them.

internal dimensions for the gx248 are 21,0x28,0x4,0
internal dimensions for the gx288 are 21,0x28,0x8,0