Found or No Longer Wanted WTB WG K6100 High Voltage cover

i would argue larger holes would have less cooling. less thermal mass to spread the heat away from the cage. this is why my covers have more material on the sides where the screws connect it to the cage.

At the risk of starting a Mech E discussion, that's not the intent of the cover. It was to keep fingers out, EMI in (likely?) and to allow some air flow to cool components. It was not designed to dissipate heat through conduction.
 
At the risk of starting a Mech E discussion, that's not the intent of the cover. It was to keep fingers out, EMI in (likely?) and to allow some air flow to cool components. It was not designed to dissipate heat through conduction.
correct but but i took advantage of it anyways. its not as if it matters much
 
You and I will completely disagree on this.
i understand your point . would it help if i told you i have already tested this? believe it or not if you average the hole size across the side it matches the original cage. but the top does not so i measured with my laser thermometer the ambient temp of internal components and the temp of the cage its self and no differences were found. so long story short my theory of extra thermal mass at the screw holes and sides may not actually make a difference in temp but all components were the same temps as original cover
 
i understand your point . would it help if i told you i have already tested this? believe it or not if you average the hole size across the side it matches the original cage. but the top does not so i measured with my laser thermometer the ambient temp of internal components and the temp of the cage its self no differences were found. so long story short my theory of extra thermal mass at the screw holes and sides may not actually make a difference in temp but all components were the same temps as original cover

I'm happy to hear that you did this analysis. As I mentioned, I'm not going to agree with you here.
 
The cage is there to reduce EMI. Ideally it would have no holes at all. But then the internal components might melt.
So they added cooling holes. A bunch of holes. Then they relied on convection for cooling.

Thermally it was probably overdesigned in the first place so a small change in the hole pattern probably won't make a huge difference.
To paraphrase the legendary Bob Pease...."if it's obviously excessive, you don't have to worry about thermodynamics, or fluid dynamics, and all of that multidimensional calculus stuff".


1720540025616.png

Notice the bottle cap TO-3 TRANSISTOR BOLTED TO A CAR ENGINE !!!
(Technically a cyllinder head from a VW Beetle I think.)

Bob Pease was awesome. RIP.
 
The cage is there to reduce EMI. Ideally it would have no holes at all. But then the internal components might melt.
So they added cooling holes. A bunch of holes. Then they relied on convection for cooling.

Thermally it was probably overdesigned in the first place so a small change in the hole pattern probably won't make a huge difference.
To paraphrase the legendary Bob Pease...."if it's obviously excessive, you don't have to worry about thermodynamics, or fluid dynamics, and all of that multidimensional calculus stuff".


View attachment 754456

Notice the bottle cap TO-3 TRANSISTOR BOLTED TO A CAR ENGINE !!!
(Technically a cyllinder head from a VW Beetle I think.)

Bob Pease was awesome. RIP.

They didn't 'add holes' they went the sensible route and used a low cost off the shelf perf metal and bent it. Having it laser cut is excessive and unnecessary.
 
here is a decent heat sink i used on an old defection board design turned audio amplifier. it even has a name brand on it lol
too loud for the phone microphone so there is massive distortion
 
here is a decent heat sink i used on an old defection board design turned audio amplifier. it even has a name brand on it lol
too loud for the phone microphone so there is massive distortion

I've never seen someone love their own name so much. Its so fucking weird.
 
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