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kevin gilmore

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kevin gilmore last won the day on April 26 2017

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About kevin gilmore

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    Staximus Maximus, Stax Mafia's Chief Cook and Bottle Washer

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  1. kevin gilmore

    krell ksa5 klone

    It really depends on which resistors were changed. If they gave you a schematic, please post it. Edit: found the schematic. you can replace the 1k with 10k resistors. The power supply will come up a bit slower, but it will otherwise work.
  2. kevin gilmore

    krell ksa5 klone

    Yes that is one of my layouts, not in a position to look up schematic/board at the moment.
  3. kevin gilmore

    and now for something completely different part 3

    In balanced mode the output current capability can blow the protection circuit of the esl63 if you attempt to play it to loud. other than that, it should sound wonderful.
  4. kevin gilmore

    and now for something completely different part 3

    The 25 amps was ac line input current rush
  5. kevin gilmore

    and now for something completely different part 3

    I guess you can use the amps supply at +/-40 and then you don't populate the reg transistors. But I would go with +/-55v and then use the reg transistors and the GRLV to make the 40v references you might get away with +/-50v because the voltage drop of the GRLV should be minimal that way it's going to be absolutely noise free. congo5 did have some trouble with the power on, the switch on for the transformers he is using drew something like 25 amps If that smps supply is designed
  6. kevin gilmore

    and now for something completely different part 3

    There was a cement power resistor tit perfectly, I am not in a position to get the part number now. you need the balanced front end board which stacks on top of the amp board if you want to do balanced. the +/- reg inputs come from GRLV supplies set for the appropriate voltage (which I don't remember) I don't remember what the pot does, probably output current adjust single ended its 25 watts pure class A into 8 ohms. Balanced 100 watts pure class A into 8 ohms. you can raise the power supply voltages and lower the idle current and get 400 watts into my 8 ohms 50 watts of which are class A Obviously you need the appropriate mound of aluminum to get rid of the heat. Or water cooling.
  7. kevin gilmore

    2SA1968 substitution

    Kerry will have to answer that. mikhail's biggest problem was the fact that everything out of his mouth was a lie. every es1 burned up the hand selected tubes mikhail picked for them due to major cathode voltage violation. After that the amp is toast. There were 2 other es1 with the gas tube power supplies. One of those is known toast. also the price of 33000 yen for the t8000 is clearly way off base, it is 550000 yen and the website has changed!
  8. kevin gilmore

    2SA1968 substitution

    The Kerry version of the T2 is a one of piece, and I'm pretty sure Kerry won't sell it for anything less than $50k. none of that stuff is available, including the 2 singlepower pieces. At any price. There were only 5 X es1/es2 total made, I have one, Birgir has one, and I know where 2 of the other 3 are. And that sdsxlr is also a one of piece.
  9. kevin gilmore

    2SA1968 substitution

    How does this scam work? The solid silver seems to be the only thing that might exist for purchase.
  10. kevin gilmore

    2SA1968 substitution

    I don't think that a single amplifier on that page is actually purchaseable. and the bhse insides picture is labeled wrong. the singlepower pictures are also kind of funny these days.
  11. kevin gilmore

    Balanced to unbalanced board

    Yep, a few more parts and more $. But usable for just about anything.
  12. kevin gilmore

    krell ksa5 klone

    you will effect the frequency response. best to use the right part in this case.
  13. kevin gilmore

    Massdrop copycat R2R DAC

    years ago I designed a r2r/sacd dac which I would still like to do. But the fpga code was something I knew nothing about, and when I went searching for someone to do the code I ended up with absurd prices in the $350k range. Now given the amount of time that may have been put into this, that was probably not completely out of the range of reasonable. Over the years that price has dropped, a lot recently, someone is willing to sell me the code for $5k. So its clear that the code has been ripped, or reverse engineered and the source code is now readily available. Its also clear from those pictures that the massdrop board is a virtual identical copy of the hibiki board. There is evidently software out there that will take gerber files and turn them back into editable layout files. my guess is that the firmware in the 2 boards is at least marginally different. so they are not the same even though from a hardware standpoint they are completely identical. in the end its probably going to be shown that even the stupid high priced spreads (msb,totaldac…) will have a code base that started at the same root. another year or 2 and this will all be public domain. Then the math wizzes out there will be able to work on the FIR and IIR code for optimization.
  14. kevin gilmore

    Massdrop copycat R2R DAC

    I expect that the fpga code has been leaked and pretty soon everyone will have 24 bit sign magnitude dacs that convert dsd. also this uses actual switches, not the 8 bit shift registers, so it's a better quality product than some of the stupidly priced things. massdrop seems to be doing their best to drop the bottom out of the audio market
  15. kevin gilmore

    Megatron Electrostatic Headphone Amplifier

    you can listen to it. But better to pick pairs of tubes that result in better balance. or trim the cathode resistors, but really better to pick matched tubes. yes it gets pretty warm. touch a 120 watt fender head sometimes.