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   alt.electronics      Electronics design, repair, worship, etc      7,706 messages   

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   Message 7,022 of 7,706   
   rickman to James Wilkinson Sword   
   Re: Running an empty microwave oven (1/2   
   01 Jan 18 16:51:50   
   
   XPost: sci.electronics.equipment   
   From: gnuarm.deletethisbit@gmail.com   
      
   James Wilkinson Sword wrote on 1/1/2018 11:16 AM:   
   > On Mon, 01 Jan 2018 04:44:33 -0000, rickman    
   > wrote:   
   >   
   >> James Wilkinson Sword wrote on 12/31/2017 6:39 AM:   
   >>> On Sun, 31 Dec 2017 00:59:45 -0000, rickman  wrote:   
   >>>   
   >>>> James Wilkinson Sword wrote on 12/30/2017 6:45 PM:   
   >>>>> On Sat, 30 Dec 2017 22:33:26 -0000, rickman  wrote:   
   >>>>>   
   >>>>>> James Wilkinson Sword wrote on 12/30/2017 3:56 PM:   
   >>>>>>> On Sat, 30 Dec 2017 20:48:34 -0000, rickman  wrote:   
   >>>>>>>   
   >>>>>>>> James Wilkinson Sword wrote on 12/30/2017 3:34 PM:   
   >>>>>>>>> On Sat, 30 Dec 2017 20:31:14 -0000, rickman  wrote:   
   >>>>>>>>>   
   >>>>>>>>>> James Wilkinson Sword wrote on 12/30/2017 9:37 AM:   
   >>>>>>>>>>> On Sat, 30 Dec 2017 05:39:04 -0000, Robert Baer   
   >>>>>>>>>>>    
   >>>>>>>>>>> wrote:   
   >>>>>>>>>>>   
   >>>>>>>>>>>> James Wilkinson Sword wrote:   
   >>>>>>>>>>>>> On Thu, 28 Dec 2017 03:59:42 -0000, Robert Baer   
   >>>>>>>>>>>>>  wrote:   
   >>>>>>>>>>>>>   
   >>>>>>>>>>>>>> James Wilkinson Sword wrote:   
   >>>>>>>>>>>>>>> On Tue, 12 Dec 2017 03:49:55 -0000, rickman    
   >>>>>>>>>>>>>>> wrote:   
   >>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>>> James Wilkinson Sword wrote on 12/11/2017 11:50 AM:   
   >>>>>>>>>>>>>>>>> On Mon, 11 Dec 2017 04:07:43 -0000, Mary-Jane Rottencrotch   
   >>>>>>>>>>>>>>>>>  wrote:   
   >>>>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>>>>> On 2007-01-19 12:13, Peter Fucker wrote:   
   >>>>>>>>>>>>>>>>>>> Is it really true that turning on a microwave with nothing   
   >>>>>>>>>>>>>>>>>>> in it   
   >>>>>>>>>>>>>>>>>>> will   
   >>>>>>>>>>>>>>>>>>> break it?   
   >>>>>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>>>>> Derp.   
   >>>>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>>>> It was a sensible question.  This could be done by accident.   
   >>>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>>> I interviewed with a place once that was doing something with   
   >>>>>>>>>>>>>>>> testing   
   >>>>>>>>>>>>>>>> microwave ovens.  They ran them all the time with nothing in   
   >>>>>>>>>>>>>>>> them.   
   >>>>>>>>>>>>>>>> I had   
   >>>>>>>>>>>>>>>> always read that you should not operate them with nothing to   
   >>>>>>>>>>>>>>>> absorb the   
   >>>>>>>>>>>>>>>> energy and mentioned that.  I got a strange look from the guy.   
   >>>>>>>>>>>>>>>> Obviously   
   >>>>>>>>>>>>>>>> the energy that would be absorbed is within the limits of what   
   >>>>>>>>>>>>>>>> the   
   >>>>>>>>>>>>>>>> ovens   
   >>>>>>>>>>>>>>>> were designed to get rid of.   
   >>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>> You'd think there would be something that absorbs microwaves   
   >>>>>>>>>>>>>>> that   
   >>>>>>>>>>>>>>> miss   
   >>>>>>>>>>>>>>> the food.  And you'd think such a thing would have a thermal   
   >>>>>>>>>>>>>>> cutout.   
   >>>>>>>>>>>>>>> Anybody want to try it?   
   >>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>    IDIOT!   
   >>>>>>>>>>>>>>    ain't nuttin that "absorbs" the energy.   
   >>>>>>>>>>>>>>    Ask how the maggie works with highly mis-matched loads (hi   
   >>>>>>>>>>>>>> SWR).   
   >>>>>>>>>>>>>   
   >>>>>>>>>>>>> I went for an interview in a place that designed industrial   
   >>>>>>>>>>>>> strength   
   >>>>>>>>>>>>> magnetron.  There IS a block to absorb energy.  A microwave oven   
   >>>>>>>>>>>>> without   
   >>>>>>>>>>>>> one is VERY badly designed.   
   >>>>>>>>>>>>>   
   >>>>>>>>>>>>    Rule of thumb or any commercial (= = volume) item is: for every   
   >>>>>>>>>>>> fifty   
   >>>>>>>>>>>> cent cost to make, selling price must go up by five dollars (cars,   
   >>>>>>>>>>>> toys,   
   >>>>>>>>>>>> etc).   
   >>>>>>>>>>>>    Industrial grade magge-powered ovens cost a lot more than the   
   >>>>>>>>>>>> over   
   >>>>>>>>>>>> the counter el-cheapos that the great unwashed buy.   
   >>>>>>>>>>>   
   >>>>>>>>>>> Why would you need to make $4.50 extra because you spend $0.50 more   
   >>>>>>>>>>> on the   
   >>>>>>>>>>> production?   
   >>>>>>>>>>   
   >>>>>>>>>> I don't know that it is 10 to 1, but the $0.50 higher production   
   cost   
   >>>>>>>>>> means   
   >>>>>>>>>> the price is elevated at each step of the distribution process..   
   >>>>>>>>>> Most   
   >>>>>>>>>> costs   
   >>>>>>>>>> of handling, storage, promotion and retailing are allocated by   
   price.   
   >>>>>>>>>> Raise   
   >>>>>>>>>> the price from the manufacturer by 10% and the final sale price also   
   >>>>>>>>>> goes up   
   >>>>>>>>>> 10%, not the exact dollar rise of manufacturing.   
   >>>>>>>>>   
   >>>>>>>>> It costs no more to shift a microwave oven through the retail system   
   >>>>>>>>> if a   
   >>>>>>>>> component inside it costs $0.50 more.  If I was a shop selling   
   >>>>>>>>> microwaves,   
   >>>>>>>>> I'd want a fixed profit per unit, not a percentage.   
   >>>>>>>>   
   >>>>>>>> But you are not a shop selling microwaves or anything else most   
   >>>>>>>> likely or   
   >>>>>>>> you'd be out of business quickly.  I suppose you might do OK selling   
   >>>>>>>> gravel.   
   >>>>>>>>   
   >>>>>>>> Virtually every retail establishment has costs which *do* vary with   
   the   
   >>>>>>>> selling price of a unit.  Which do you think sits on the shelf longer,   
   >>>>>>>> the   
   >>>>>>>> $100 microwave "marked down" to $69 or the $399 unit?  That shelf   
   space   
   >>>>>>>> costs money, advertising costs money, heating, cooling and lighting   
   the   
   >>>>>>>> store costs money.  Sometimes the store has their own capital tied   
   >>>>>>>> up in   
   >>>>>>>> the   
   >>>>>>>> goods (not Walmart, it's yours until it is sold) and a higher profit   
   >>>>>>>> is the   
   >>>>>>>> only reason for selling higher priced goods that take longer to   
   >>>>>>>> shift and   
   >>>>>>>> sell fewer.   
   >>>>>>>>   
   >>>>>>>> Do you really not see this?   
   >>>>>>>   
   >>>>>>> I would imagine they both sit on the shelf for the same amount of   
   >>>>>>> time, or   
   >>>>>>> they're badly priced.   
   >>>>>>   
   >>>>>>    Ok, I suppose you know more than the retailers.   
   >>>>>   
   >>>>> Tell me why they want to make fuck all on cheaper ones that take up the   
   >>>>> same   
   >>>>> store space.   
   >>>>   
   >>>> Why does a supermarket sell name brand and store brand at a much lower   
   >>>> price?  Why do they sell luxury cars and economy cars?   If they make the   
   >>>> same profit on every car regardless of selling price, why bother with the   
   >>>> expensive ones?   
   >>>   
   >>> Half their customers like expensive goods, half like cheap goods.  It   
   >>> doubles the sales if you provide both.   
   >>   
   >> So they don't care if they have to inventory a lot more dollars for the same   
   >> return?  You don't understand retail.   
   >   
   > Let's say I have a shop with shelf space for 500 microwaves.  If the   
   > expensive ones make me £50 and the cheap ones make me £10, I ain't gonna   
   > sell the cheap ones.   
      
   Like I said, you don't understand retail.  You may only make 10 on the low   
   priced ovens, but if you sell 10 of those for every 1 of the high priced   
      
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