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Everything posted by GeorgeP
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I use the Aoyue 968A+ SMD Digital Hot Air Rework Station. It has worked flawlessly for 3 years of hobbyist DIY, and has the hot air gun for smd (but I use it for heatshrink, which is convenient). Has a smoke sucker too, which works well, but you have to clean the filter out every once in a while. Probably not the same long-term quality as OKI/Metcal or Hakko if you are cranking out an amp or two every day of the year, but more than good enough for our purposes. Amazon has it for $175, shipped - http://www.amazon.com/Aoyue-968A-Digital-Rework-Station/dp/B006FA481G
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Thanks Wachara.
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Wanted to add an HE90 jack but wanted to make sure I have the wiring correct from the front view. Not something anyone wants to take any chances on, but surprisingly little info out there on this (other than an old head-fi thread from 2010): Was planning on using the +500 supply for the bias and add another 5M resistor in series.
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Great work, Jean-Denis! And just confirming for others that you flush mounted your takman resistors without any noise issues. Could help future builders.
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Did you find that you needed the servo?
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It's not just a silk line?
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Yes, your board is missing a trace in that spot. You have the slightly shrunk version. Looks like the trace got dropped somehow.
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No board bugs in your version - pretty sure Inu's boards were from the initial run before the corrections were made. But your board is 4oz copper which means everything needs to be extra-perfect.
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Pretty much anything around 30v and down is fine. Don't worry about the batteries being exactly 740v - in fact I am only aware of them not being absolutely perfect. But worrying about fine adjustments without plugging in a set of earspeakers at this point is premature (unless you are lucky and your t2 is silent without having to do some adjustments to the pots).
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There are actually quite a few such references in the T2 thread, won't look for them all, but the following was found fairly quickly:
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He's not referring to the carbon.
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So we have gone from it being an excellent circuit that could not be improved upon to now a flawed circuit design? Clearly above my pay grid, but seems to be a lot of revisionism occurring of late.
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With higher parts count and everything sharing the same ground plane, it would be questionable as to whether there would be any benefit - if I recall that was the reason Kevin stated in leaving it out. But as always the proof is in the pudding. For example the t2 has a massive ground plane, but many folks have experienced noise issues nonetheless.
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I think he is referring to the fact that Kevin purposely left out the ground plane - though he said there would be no difference. Maybe Kerry can do some noise measurements when he finishes his.
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Just going by memory, but I thought Kevin suggested the 680uf 550v caps when he was designing the circuit and doing the board layout for the group buy.
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what would be the concern with the caps? Isn't it kind of like point to point wiring?
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since this is a DIY thread, care to post some internal pics. Interested in seeing how the caps are mounted given the size of the chassis.
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That is great news!
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suppose opening the sheet could have helped, but google docs and my phone don't get along.
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What would the potential price on the TO-71 be? And would it be A or B?
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C'mon, pick it up J-D! Why no music yet?
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Looking good!
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Was talking about taking a bath on a 25k source (selling for 8-9k now) and picking up a 30k source plus the Yggy. Add up all the dosh spent and to be spent and well...