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kevin gilmore

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Everything posted by kevin gilmore

  1. for a 10k pot, the series resistors should be 10k, and then calculate the other resistor for the attenuation you need
  2. buy the neutrik xlr-male to xlr-female adapters and pick your attenuation and use either 3 or 4 resistors depending on whether the dac is really balanced or not. http://www.mouser.com/ProductDetail/Neutrik/NA3FM/?qs=sGAEpiMZZMv0W4pxf2HiV9y0EyfHsAgRI%2fcUCPoRaKI%3d
  3. Which is insanely high, but lots of dac's are doing that these days. You need a 10db balanced pad on the input.
  4. icarium has one of my cases
  5. yep that is the one.
  6. suggest you buy the transistor tester meter on ebay, cheap and the best way to test them before you stuff them in the boards and then find out they are not real.
  7. those are vertical mount resistors to keep the board size down
  8. http://gilmore.chem.northwestern.edu/megatron.pdf
  9. actually use a 12V car battery. you will find the shorts very quickly
  10. i have a few left
  11. typically you cannot get it to zero on both sides. But if you can, it should be stable
  12. not only is that plug a piece of shit, its the wrong dimensions and will crack a real stax female socket.
  13. singlepower would have used super glue. just like he did on all of those blackgate caps
  14. i went back to the pictures to make sure all of the parts on heatsinks in the original are on the common heatsink bar in the diy-T2 there are 2sc3675's with no heatsinks in the original, and they are that way on the diy-T2
  15. So i can certainly make some of those, and out of the metal that turns superconducting at LN2 temperatures. Put over a rare earth magnet, and they will spin for a very long time.
  16. you do realize that giving me idea's like this is only going to cause trouble
  17. very sweet now you need a 2 color power switch warming is one color, on is a different color (from joamat's T2 boards)
  18. pass labs clone chassis. nice until you have to put the jack and knob on the front panel
  19. not supposed to tap the heatsink. drill it the right size. transistors and screws and washer from the top, transistor, thermal washer,heatsink,circuit board,washer,nut
  20. 3 hours total 6 shots of various vodka's (new kickass Russian/French restaurant with 50 different vodka's) http://dekarestaurant.com/ and after generating the netlist, its still correct. scary The nice thing is this way you can drive all 32 relays at the same exact time. but unless you can calculate relay position, a lookup table is necessary board file posted, needs checking
  21. but but... its upside down. anyway http://gilmore.chem.northwestern.edu/atten2stereobal.jpg 2.05 x 3 inches but only 2 layers and still have to add or change the drivers
  22. yep 2 colums and both sides. you might as well put it all on one board because of the size of the drivers determines the minimum width if you solder all the resistors first, then possibly the inside row of pins on the relays could be hard to get at.
  23. I actually think I can get a balanced step attenuator with those relays in the same size as the original, all 16 relays. But a human is unlikely to ever be able to assemble it.
  24. transistors need to have a Vceo of 50v or more bias is 150 ma and the current mirror as the VAS means that the peak to peak voltage swing is 40V on +/-24v supplies absolutely flat to more than 5mhz
  25. there were some pictures posted over there on the inside of the amp 7 tubes and a whole pile of output transistors
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