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Found 3 results

  1. I and a few others have decided to get the new bipolar version of Blue Hawaii PCB made by PCBnet in US. I used PCBnet for the Carbon GB in 2015 (and other occasions). Their price is higher but we’ve had great experience with their board quality. The boards will be 2mm thick and 4oz copper, green solder mask and white silkscreen in leaded finish. The cost of boards is $30 USD for a set (two PCBs) if we can get 15 sets made. You’ll need to add shipping from me to you for the total cost. Kevin released this latest version of Blue Hawaii in early 2016. I worked with Kevin to trace
  2. First, sincere thanks to everyone who contributed in the forum.I cannot start the project without resources from here. Recently I have finished my KGBH build but it isn't working.The observable problems are the two LEDs connecting 2sa1968 and the one connecting 2sc3675 do not light up as well as those 1968s not heating.Curiously, the amp works for a second every time after i turn the power off,right after the extinguish of the leds connecting the + and - 15v supply. The PSU unit is measured of giving the right voltage. I once thought of giving up the project but before that I try my luck
  3. Hopefully I'm at the right place this time. I want to build a kevin gilmore blue hawaii amp. As a starting point I found the original http://headwize.com/?page_id=751 and the more recent http://gilmore.chem.northwestern.edu/BlueHawaii-T2-Servo-v1-2.zip (needs LTSpice). Is there a recent version without servo, with PCB's and all that? CCS is yet partly diskussed, has someone experiance with "mu follower Output" to decouple the complex loads partly from the tubes (see schematic)? What about a PS if no 500V pnp is found? From the PSRR viewpoint I'd start with the concept: "care about high
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