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

IRF 740 + PT2308 + EM84 IRF 740 + PT2308 + EM84
  • Item: FET Amp
  • Type: IRF 740 + PT2308 + EM84
  • Posted: 7 March 2013
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 0
2E36 + TDA 7050 2E36 + TDA 7050
  • Item: Tube Amp
  • Type: 2E36 + TDA 7050
  • Posted: 22 February 2013
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 2
1ZH18B tube amp 1ZH18B tube amp
  • Item: Tube Amp
  • Type: 1ZH18B tube amp
  • Posted: 7 February 2013
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 0
6N28B tube 6N28B tube
  • Item: Tube Amplifier
  • Type: 6N28B tube
  • Posted: 28 July 2012
  • Builder: Especuloide
  • Country: Brazil
  • Comments: 2