Grahame Posted March 23, 2009 Report Share Posted March 23, 2009 I have a basic question. Should I put the mayo between the bread and the ham, or between the ham and the salad? From Alton Brown's unified theory of sandwich physics. Corollary 2: When wet ingredients, such as tomatoes are used, a thin coating of mayonnaise, butter, cream cheese or oil should be applied to the bread as a moisture barrier. so: when using wet ingredients apply a moisture barrier From Here: SandwichCraft Transcript Much, much more good eats stuff here: Good Eats Fan Page Quote Link to comment Share on other sites More sharing options...
guzziguy Posted March 23, 2009 Report Share Posted March 23, 2009 I have a basic question. Should I put the mayo between the bread and the ham, or between the ham and the salad? Neither, you should be using mustard instead of mayo. Quote Link to comment Share on other sites More sharing options...
fordgtlover Posted March 23, 2009 Report Share Posted March 23, 2009 Here's a web article I found useful in the past. It's called Replacing Passive Components to Improve Sound Quality, which seems relevant to the OP. It has a section on resistors. http://www.geocities.com/Area51/Nebula/3736/improve_audio.txt Here's some information form Tangent's website that pretty much addresses the issue of resistor symmetry. Hand-Matching Resistors to Tighter Tolerances Quote Link to comment Share on other sites More sharing options...
TomB Posted March 23, 2009 Report Share Posted March 23, 2009 No, just simplicity, and less arguing the intricacies of theoretical stuff us nubs don't understand anyway We want basic answers to basic questions.Sorry, I'm not trying to start anything, but the first response you got to your question in this thread had the potential of leading you astray. Yet, considering the estimable reputation of that source, we were trapped into citing real documents to get you back on the right path. Put simply: stay with 2X on sizing resistors for power rating and stay with metal films (preferrably Vishay-Dales) to reduce the noise to the least amount possible. Also note that V-D resistors are typically already over-rated at 2X on power. If you start asking about boutique resistors, then it's another issue entirely and opinions will be all over the map. Hope that was simple enough ... Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 23, 2009 Author Report Share Posted March 23, 2009 Thanks Tom, yes simple is good or my old pea brain gets confused. Next Q What in basic terms does cascoding mean and do? I hear it bandied about frequently and when I look it up on wikipedia it explains it with more jargon Quote Link to comment Share on other sites More sharing options...
Beefy Posted March 24, 2009 Report Share Posted March 24, 2009 What in basic terms does cascoding mean and do? I hear it bandied about frequently and when I look it up on wikipedia it explains it with more jargon I don't fully understand it, but think I can summarise the wikipedia for you. Imagine you want to amplify a small signal in a circuit. You can just pop a single transistor in the circuit and it will work, but not great, because you also amplify the small capacitance present in the transistor. But if you use two transistors together in a cascode you don't amplify the capacitance so it potentially works much better. Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 24, 2009 Author Report Share Posted March 24, 2009 Ta Beefy Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 31, 2009 Author Report Share Posted March 31, 2009 Next question, those little flat rubbery insulator sheet thingies that go between mosfet and heatsink, what are they called as I need some Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted March 31, 2009 Report Share Posted March 31, 2009 (edited) Next question, those little flat rubbery insulator sheet thingies that go between mosfet and heatsink, what are they called as I need some Generically, they are called heat sink pads. They come in all shapes and sizes. Most likely you want electrically isolated pads. Here's the catalog page at Digikey that is most appropriate: http://dkc3.digikey.com/PDF/T091/P1177.pdf Aavid Thermalloy also makes some that are sold at Mouser. If you need onesy-twosys, PM me your address and I'll drop them in the mail BTW, the 6-pin socket arrived and my template is slated to arrive today... so once I get home, we'll see how it fits! Edited March 31, 2009 by luvdunhill Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 31, 2009 Author Report Share Posted March 31, 2009 Cool, thanks marc. I need a pair for another starving student. Quote Link to comment Share on other sites More sharing options...
Pars Posted March 31, 2009 Report Share Posted March 31, 2009 You will likely also need the nylon shoulder washers that insulate the screw from the device tab (if metal). Ratshack sells these TO-220 Mounting Hardware - RadioShack.com Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 31, 2009 Author Report Share Posted March 31, 2009 Thanks very much. I was in rat shack last week hunting for these with no luck. It's a small shop. Quote Link to comment Share on other sites More sharing options...
Pars Posted March 31, 2009 Report Share Posted March 31, 2009 Well, I neglected to mention that at $2 apiece, they are a rip. But, in an emergency... Mouser catalog page showing shoulder washers, mounting kits, etc. http://www.mouser.com/catalog/637/1936.pdf Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 31, 2009 Author Report Share Posted March 31, 2009 Yeah, and quicker than some other places Quote Link to comment Share on other sites More sharing options...
spritzer Posted March 31, 2009 Report Share Posted March 31, 2009 You can also just use good old fashioned heat sink compound if the transistors have a plastic back. Just remember, less is more with that stuff. Quote Link to comment Share on other sites More sharing options...
swt61 Posted March 31, 2009 Report Share Posted March 31, 2009 BTW, the 6-pin socket arrived and my template is slated to arrive today... so once I get home, we'll see how it fits! Dr. Wood will prep the O.R. for Teflon surgery, stat! Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted March 31, 2009 Report Share Posted March 31, 2009 Yeah, and quicker than some other places I got those phenolic shoulder washers too... Looking for the envelope now with your return address. How many do you need? I have lock washers and socket head screws as well... anything else you need? Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 31, 2009 Author Report Share Posted March 31, 2009 Ok, well if you have some spare I need two for a starvin student thanks Quote Link to comment Share on other sites More sharing options...
swt61 Posted March 31, 2009 Report Share Posted March 31, 2009 I got those phenolic shoulder washers too... Looking for the envelope now with your return address. How many do you need? I have lock washers and socket head screws as well... anything else you need? Do I need some of those for the mos fets on the F5? Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted March 31, 2009 Report Share Posted March 31, 2009 Do I need some of those for the mos fets on the F5? I dunno, budding DIYer, do you? Quote Link to comment Share on other sites More sharing options...
swt61 Posted March 31, 2009 Report Share Posted March 31, 2009 Yes, damn it! Quote Link to comment Share on other sites More sharing options...
Smeggy Posted March 31, 2009 Author Report Share Posted March 31, 2009 hehe Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 1, 2009 Report Share Posted April 1, 2009 Yes, damn it! heh. If you look at the front and back of your transistors, you'll see that everything is rather isolated.. i.e. no metal on the top or inside the hole. If you look at the transistors on the Millet, you'll see there is a metal tab. If you look at the datasheet for those transistors, you'll see the tab is tied to one of the three pins and ultimately to the circuit. They is why they need to be isolated. Quote Link to comment Share on other sites More sharing options...
swt61 Posted April 1, 2009 Report Share Posted April 1, 2009 So I just flunked my first exam huh? I better study up for the next one. Quote Link to comment Share on other sites More sharing options...
Beefy Posted April 1, 2009 Report Share Posted April 1, 2009 Or you could always just hit the examiner over the head with a lump of wood. Quote Link to comment Share on other sites More sharing options...
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