• Item: 829 PPP amp  
  • Type: 829B PPP  
  • Posted: 11 January 2015  
  • Builder: sagos  
  • Country: Greece  
  • Comments: 0  

parallel push pull (PPP) amplifier with 829

the big member of my tube amplifier family.Power: 70W rms(8ohm)
uses two (4 pentodes per channel) 829B in parallel push pull topology.A very difficult project than took me 2 years!!Uses 12au7 as preamplifier, 12sn7 as phase splitter.The power supply uses OA2 , to have 150v dc at screen filament (G2).

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