dfel
Responses from dfel
| MC Step Up Math Yeah I guess I just have to roll with it, the rule of thumb as a guide along with the formula + testing by ear.However, applying the rule becomes tricky since the data spec quotations on several transformers are not quoted at 47,000. For example: ... | |
| MC Step Up Math The only thing to say really is where does 10X come from ? The answer however from reading many sources, including bobs is: everyone else is doing it. No real science there, just audiophile blind faith I guess. I was hoping to get some insight int... | |
| MC Step Up Math Al, if you don't mind my asking..where the heck did you learn all this stuff? Do you have a background in electrical engineering? I have struggled to try and really understand the science behind this hobby and the learning curve can be steep at ti... | |
| MC Step Up Math As for the turns ratio flatness... Is the issue you are talking about the "corner frequency"?You explained that there may be issues from the change in impedance all three variables are related. I can put the voltage in terms of Impedance, effectiv... | |
| MC Step Up Math Al, what is the reason for this 10X rule ? I mean at the core of it, do you just take it on blind faith. The ideal match really hinges on this figure, is there any science behind it or is it just an intuitive thing ? I am not trying to be rude, pl... | |
| MC Step Up Math To extend what Al has said in the last post. With the dynamic nature of the impedance characteristic, would it not make sense to pick a "flattest" segment of the curve to operate on. The X Axis turns ratio variable can be converted to effective lo... | |
| MC Step Up Math Thanks again AL, great post. I would love to know why? What is the electrical theory behind this? There got to be someone out there who came up with the 10X rule, I am certain that it has some kind of physical/mathematical explanation. And if it d... | |
| MC Step Up Math For that last post I am referring to the chart HERE: http://s28.postimg.org/9kno6o95p/Denon_Chart.png | |
| MC Step Up Math Here is the thing. It leads back to the main dilemma. Let us stick to the example for to see what I mean. The Denon 103 with .3MV, and 40 Internal impedance. I used the voltage equation to calculate what happens at all the turns ratios. You can se... | |
| MC Step Up Math I mapped out a curve of the various step up turns ratios for a denon 103, for those that are into seeing the visual of what we are discussing here. I dont have one of those carts, but tons of people do, so I figure why not use it as an example. ha... | |
| MC Step Up Math Yes AL, I am know very little about electrical theory and the Higher (numerically lower) and Lower (numerically higher) is what confused me, you were consistent not mistake on your part it is the semantic I was confused with. | |
| MC Step Up Math " What is effective Load. He is taking 47,000/(turnsratio^2). What does that tell you, what is that calculation? A transformer transforms impedance in proportion to the square of the turns ratio. So the load impedance seen by the cartridge corresp... | |
| MC Step Up Math "As the load impedance seen by the cartridge becomes higher in relation to the cartridge's internal impedance, the difference between the two calculations (i.e., the calculations with and without application of equation*) becomes progressively sma... | |
| MC Step Up Math I get the math, it is a simple equation, However I still do not understand why or where it comes from. 1. What is effective Load. He is taking 47,000/(turnsratio^2). What does that tell you, what is that calculation? 2. What is equation (*)? Where... | |
| MC Step Up Math Essentially what I am saying in a nutshell is this : Equation star appraches 1 as effective load increases. When it is 1 you can simply multiply the turns ratio * the cartridge ouput. However equation (*) becomes less than 1 but greater than 0 as ... |