Garage1217 Project Horizon III / Project Sunrise III

Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by Luckbad, Feb 28, 2016.

  1. Luckbad

    Luckbad Basshead - Friend

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    Last I heard there were concerns about the price it would have to be set at.
     

  2. Chris45set

    Chris45set Rando

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    I received a quote from the eBay source mentioned about a power supply. Will one amp be adequate with the supercharger or is more capacity needed? Thanks again for that recommendation.
    Chris
     
  3. Luckbad

    Luckbad Basshead - Friend

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    If you get 1 amp instead of 1.25, it will technically work, but...

    Basically, with a 6N6P tube, you'll get more inrush current than that 1 amp can provide. Most likely, the amp will flicker on and off several times until it has heated up enough to stay on. This is what happened when I was using the stock supply from G1217. He sent me a beefier power supply and it never happened again.

    With my bench supply, it can actually only provide 1.025 amps (not 1.25). It has a protection mechanism built in that basically drops the voltage and maxes out current. I have to flip the Horizon on, wait for about 10 seconds, then flip it off and on again to get it to settle in.

    It only maintains 0.4-0.5 amps during normal operation, it's just the inrush of current to get the tube heated up that you need greater than 1 amp for.

    So, the short version is: If you end up preferring the 6N6P tube, it's probably worth getting something closer to 48V/1.25A. Any other compatible tube doesn't require as much inrush and you can get by at something like 0.8A with a 12BH7 (this tube is perfectly content with my 1.025A and never even gets to 1A with it).
     
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