Builder

  • Nickname: Especuloide
  • Name: Roberval Tourinho
  • Country: Brazil
  • Projects: 13
  • Comments: 18

Recent Comments

  • Voyager
  • 12 January 2015 at 12:00PM
  • Nice nixie touch !
  • Headphone Amplifier
  • 31 May 2014 at 01:27PM
  • No, zero noise. And the psu (9v) is a salvage from an old Philips electric shaver.
  • JAN6418 tube amp.
  • 6 February 2014 at 04:47AM
  • I am very sorry Brian, but I only saw your message today. The filaments are connected in series, and I had the same problem of yours because I connected the R8 to the ground instead of connecting in between the filaments. You can also feed the tubes independently (in this case R8 is connected to the ground), but be sure that they are feed with 1,25 volts. If you still have any problems send me an email : roberval.to@gmail.com

Projects

12AU7 + OPA 2107 12AU7 + OPA 2107
  • Item: Tube Amp
  • Type: 12AU7 + OPA 2107
  • Posted: 10 September 2013
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 2
OPA 2107 OPA 2107
  • Item: IC Amp
  • Type: OPA 2107
  • Posted: 15 June 2013
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 2
1ZH18B + OPA 2107 1ZH18B + OPA 2107
  • Item: Tube Amp
  • Type: 1ZH18B + OPA 2107
  • Posted: 27 May 2013
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 3
6N28B + TDA 7050 6N28B + TDA 7050
  • Item: Tube Amp
  • Type: 6N28B + TDA 7050
  • Posted: 6 May 2013
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 1