DB> ... a wood minitower case... 
 MD> FWIW, such a computer would not be legal in the US, either for home 
 MD> use (fcc B), or commercial use (fcc A) ... 
Well, that might be if they caught you selling them; but if they have 
the idea that they can come into your home to see what you are using, 
I think we've all got big problems.  And, I frankly don't think the FCC 
would give a damn what you are selling until you make enough money for 
them to find it worthwhile to prosecute you for it. 
 
 AS for the EMF... didn't I suggest that you could line it with alum. 
foil? works like a charm; they usta use it in the old days of pentudes 
in the TV chassis... which was mounted in a wood veneer box.  But, hang 
on a minute; I aint so sure that there is that much more from a mthbd 
than you already have from other sources... 
  
 One case design has two brass screws on the top of the front; I thot 
I'd hook them up to a pair 556 oscillator trigger circuits so that, if 
the user touched the right one, the 12 v. DCPC system would come on, in 
the same way as a touch lamp base works, the left screw doing reset. SO, 
after soldering the chip up on a perfboard, and checkin it several times 
again and again, it don't work, dont trigger the relays. 
 
So, I fire up my inverter to power my oscilloscope.  The chip's cranking 
along at 100k or so just like it should... and even works.  Turn off the 
inverter and scope, and it is dead meat again.  Well, my home is on the 
back side of this mountain, and runs off 12 v solar panel recharged lead 
acid.  So, I take the circuit on up to the glassblower's studio and hook 
up the 556 to a wallwart for 12 volt, and it works. I hook it up to a 12 
volt battery, and it still works. take it outside, beyond the EMF from a 
110 AC wiring system in the building, and the triggers don't work. 
 
Now, maybe you can explain how your body in a normally supplied AC home, 
can aborb the 60 cycle from the wires in the wall without harm, but that 
any from a 40 mhz mthrbd is dangerous. I cannot. They both may be bad. I 
do know that the former exposure goes on continuously. I do know that in 
radio transmission, it is the watts in the wire that count, and that the 
wall often has 10 amps X 110 volts for 1.1kw, and that a ground wire put 
next to a hot wire absorbs almost all the energy, and that each bus wire 
on a mthbd has a ground wire on either side, and that for many of us who 
have cheap 486s, that chip runs 8 watts.  
 MD> I'd be dubious about removing any of the fans in the computers I have. 
 MD> Considering the tempurature of the air coming out, convection ... 
Well, sure there are pentiums out there that suck 12 amps... but that is 
only at 5 or even 3.2 volts.  SO, sure the older pents are hot, but they 
have been cutting the power in recent generations. It's frankly somethin 
to think about whether you really need a 300 watt power supply runnning 
a pentuim all day for keyboard functions, or if a 25 watt 486 might not 
save a bundle on your electric bill every month besides being cheaper.. 
Real hackers all drive with the hood off anyway. 
 I dunno how many systems are down in some guys cellar, where the air on 
the floor never gets over 70, and where he puts togather whatever cheap 
parts he can find; If the part is so hot it needs a fan, he knows. If 
not, he can enjoy the quietest part of the house. 
 Besides, if you have an efficient 486, you can give some thought to all 
the other chips on the mthbd and controller cards.  If the mthbd is put 
up vertical so the controller jacks come in from the top, then all these 
other chips will have some air flow- with no dead spots in the case.
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