New headphone amp tweaked and finished. Every once in a while a design really surprises me. Sounds better than I hoped but it is probably time to upgrade the old HD555s :) #headphones #diytubes #audiophile #diy #sennheiser
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  • wtfampsNew headphone amp tweaked and finished. Every once in a while a design really surprises me. Sounds better than I hoped but it is probably time to upgrade the old HD555s :) #headphones #diytubes #audiophile #diy #sennheiser

  • lawrence.omeallyThat's awesome. Would you mind sharing the design? I'm looking for a project to take on...
  • wtfamps@lawrence.omeally I'll draw it up and post it on my site once testing is done. The power supply is complicated but the amp is simple. Choke loaded 12bh7 feeding triode strapped octal.
  • chrismo1234Lovely! PS and Amp both.
  • tondonxYeah!
  • wtfamps@lawrence.omeally here's the basic schematic https://wtfamps.files.wordpress.com/2017/01/12bh7a-choke-loaded.png you'll want to limit the 12bh7 to about 8ma (saturation limit of anode choke) at the operating voltage you choose. Have fun!
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