Sheilding on/off

[Retrofan]

Hi:
Just a simple question, the sheilding off is better to cool the motherboard or on the contrary?
I've heard to comment that with it off it will be cooler, but I was thinking if you are going to put a fan blowing air from outside to inside the sheilding won't it be cooler with the sheilding?
I was thinking just in how a Beetle engine (yes, the car, and it isn't water cooled) gets refrigerated, and it's only a fan moved by the engine making the air cool it. The engine compartment is sealed with metal plaques and if you remove any it will get hotter.
 
And I was thinking too that the metal sheilding will warm the hottest parts of the mb that will be near to it with the coldest ones.
 
What do you say?

[rockape]

Hi Retrofan,

I'm a great believer in removing the shielding from my A600's and A1200's, not only for cooling but also to allow you to examine closely the motherboard for potential trubs.

I also raise and support my A600's and A1200's at the back end, under the keyboard to encourage more of the passive cooling.
A standard "Door Stop" works a treat

If I install something which may increase the heat eg: Subway, Indivision etc I Duct Tape the inside of most of the top grill and install a fan in the gap to allow the air to be forced in to the computer.  

You can even install a small piece of filter material (like that used in Cooker Hoods) above the fan to stop dust etc being blown into the computer.


Regards, Michael

aka rockape

[illy5603]

.

[amigadave]

Hi:
Just a simple question, the sheilding off is better to cool the motherboard or on the contrary?
I've heard to comment that with it off it will be cooler, but I was thinking if you are going to put a fan blowing air from outside to inside the sheilding won't it be cooler that without the sheilding?
I was thinking just in how a Beetle engine (yes, the car, and it isn't water cooled) gets refrigerated, and it's only a fan moved by the engine making the air cool it. The engine compartment is sealed with metal plaques and if you remove any it will get hotter.
 
And I was thinking too that the metal sheilding will warm the hottest parts of the mb that will be near to it with the coldest ones.
 
What do you say?

Not a good comparison.  The "Beetle" sheet metal that keeps the heated air around the exhaust system from entering the engine compartment is not filled with ventilation holes like the shielding inside the A500/A600/A1200, or any other computer models.

The shielding inside the above referenced Amiga computers is there only for electronic interference, not heat control.

[Retrofan]

Not a good comparison. The "Beetle" sheet metal that keeps the heated air around the exhaust system from entering the engine compartment is not filled with ventilation holes like the shielding inside the A500/A600/A1200, or any other computer models.
 
The shielding inside the above referenced Amiga computers is there only for electronic interference, not heat control.

Yes, I've considered both things. First about the holes, yes, but compared with the Beetle, it gets hotter with each plate you take off, but not so much as it had none. In the Amiga it only would mean that the better solution would be to close all the holes in the sheilding with aluminium tape and to let only one in the other side of the fan. I agree with Rockape, but surely would be better with the sheilding.
 
About the heat control I haven't say a word that it was for that, I know it isn't, but there wasn't a fan when they did it.
 
What I'm meaning is that a fan would have better cooling with a sheilding than without it, and the better would be what I've said: to close all holes and leave one on the other side of where the fan is installed.
 
Any car engineer there?
 
Ah, and for the better cooling, the sheilding should be painted BLACK.
Why? I'll tell you: I had a Beetle engine painted black. I changed all the metal plates to Chromed ones. The temperature rised up by 20ºC.

[murple]

On my 1200, I have to remove the shielding, otherwise things like my CF disk and Indivision won't fit in there. Unless you're watching a lot of TV over antenna (or maybe listening to radio) you probably don't need to worry about the shielding. Even then, the chances of it causing detectable interference on your TV aren't too troubling.

[Retrofan]

On my 1200, I have to remove the shielding, otherwise things like my CF disk and Indivision won't fit in there. .

Aaah the Indivision! I need one, and in fact I've opened this thread just for that while was talking to @phipscube. This post:
 
Question:

I don't have still an Indivision, but I have the internal Cd and the subway with the sheilding on. Do you know or believe it can be installed with the sheilding?
(well, I know the new Indivisions will be smaller, but can't wait so much)

Answer:

I never actually tried with the sheilding on and I wouldn't recommend it as it gets quite warm. But I *Think* its supposed to work ok with the sheilding on but a small modification is needed to the sheild itself from what I remember.

.....................
But the Indivision will fit or not with the sheilding?

[Franko]

Two reasons to remove the sheilding are, 1) it's a pain in the Arm when trying to add something to a desktop Amiga and 2) being silver it actually reflects a lot of the heat back onto the chips...

[Retrofan]

2) being silver it actually reflects a lot of the heat back onto the chips...

Yes, that's true, that's why it musn't be removed, but painted BLACK inside and outside...
 
Am I not convincing anybody?

[Franko]

Am I not convincing anybody?

Nope...

[Retrofan]

Nope...

... Somebody that tries this before I do?:laughing:

[Franko]

Why not just buy one of those lovely new Amigas from CommodoreUSA, already done in black and so no need to paint, plus no overheating problems as they only exists in CommodoreUSA's imagination... :roflmao:

[Retrofan]

Any german VW entusiast there?
 
I could put an sticker on the Amiga...
 

[TheGoose]

Any german VW entusiast there?

Yep but not air cooler Retro; I would like to get one someday though. I want a Fastback pancake engine.



BTW, the shielding is for RF interference you know, not a cooling device of any kind.

[Retrofan]

I've said I know it, but it wasn't designed with a fan on it, and I said it could be used to cool the motherboard the same way the Beetle does.
Germans know something about how to cool an engine only with air, see that Beetles in the desert in WW2... I heard there you could change two Jeeps for a Beetle...
 
Any proud German there?
 
About the photo, I'll tell you my father had one in white, although it's very very difficult to see one of those, at least here. I haven't seen one in 20 years , is there any in the Moon?