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The Multi Amp aka Dynalo Mk2

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Here's an update on the mini. I've got the external regs running now.  This thing does throw off quite a bit of heat.  I've some sinks on the output transformers now, but I'd like to make them a

Almost there.  I've got one channel dialed in and working on the second.   

Kerrys awesome mini will fit a FPE profile 1 enclosure. The smallest I could get it: 133.92mm (W) x 172.72mm (D) x 42mm (H) Smaller than Cavalli’s Liquid Carbon in height and depth, and only sl

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I had some comments back so I've made the following changes:

  • I reversed the SE and balanced outputs
  • I fixed a mistake in the schematic for the negative off-board voltage regulator

Thanks to Kevin (of course), Birgir, Marshall and Joachim for your feedback :D

Here's what might be the final...





Edited by Kerry
Error on one of the pics
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maybe i just got a bad batch, but i had a lot of trouble with the Alpha pots and plan to stop offering it in the GS-X mk2. A large percentage of them have a noticeable lump at a particular point when turning it. Sometimes you have to have a large knob attached first and then turn it slowly to find the spot. but around half of them ended up in the trash 

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SMD, SMPS... Blasphemy!

I'm actually super proud to see HC finally embracing the newer tech. How do these SMPS'es look under the scope? Does extra after-regulation help?

Edited by RudeWolf
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1 hour ago, kevin gilmore said:

fine, cram the new digital attenuator in there. should be enough room.

Not going to be easy. I started thinking about it. A couple of daughter boards might do the trick. It would be nice to have a modular solution.

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