• Item: Single Stage tube preamp - MKIV Universal  
  • Type: retro-thermionic  
  • Posted: 22 September 2011  
  • Builder: mwhouston  
  • Country: Australia  
  • Comments: 0  

4S MKIV Universal

This is the forth of these simple singe stage valve (tube) preamps I have made. This one has been carefully designed and modeled to work with every 12Axx tube. True plug and play in a tube rolling way. Again PS and amp on the one cct. brd. built on vero-board (strip board).



Currently I am using an English made 12AT7 and I believe this is the best sounding build so far. Also from the switch at the front the cathode bypass cap can be switched in or out for additional gain.

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