DIY Project
Tossie Yamanaka (Japan)
Yasuyuki Ishiyama
(Japan)
Duncan
Munro (USA)
Klaus Boehm
(Germany)
Glass
Ware (USA)
Direct Heating (Japan)
Fidelisaudio
(USA)
Steve Bench (USA)
Dan Hiedelbrad (USA)
Matthias Brennwald (Switzerland)
Tetsu Kimura (Japan)
Jaehong
Lee (Korea)
Mattijs de
Vries (Holland)
Jim de Kort
(Holland)
Bert
Molenkamp (Holland)
Jukka Tolonen (Finland)
Finn Hammers (Denmark)
Magnus
Kesselmark (Sweden)
André
Jute (Ireland)
Andrea Ciuffoli
(Italy)
Alessandro Coppi (Italy)
Stéphane Puechmorel Site 1 & Site 2 (France)
Julien (France)
Edwin Paij (Belgium)
Talisker (Germany)
Ulrich Haumann (Germany)
Klaus Schiffer (Germany)
FriHu (Germany)
Griffon
Valve Pages (UK)
Adrian Clark
Quad page (UK)
Chris Brady (USA)
Evacuated
Envelopes (USA)
Ampage
(USA)
Dan Cheever (USA)
Tube Dude
(USA)
Pats Tube Schematics (USA)
Ed
Billeci (USA)
Kevin Kennedy
(USA)
Bob Danielak
(USA)
Craig Stark (USA)
Larry Roe (USA)
SDS Labs (USA)
Chris
Beck (USA)
JC. Morisson
Chris's Tube Heaven
USA
Bjorn Aaholm
(Denmark)
Claudio Bonavolta
(Swiss)
Tim Reese (USA)
DHT Data From Hong Kong
Chris' Tube Heaven
Single Ended
Triode Link Pages
Lowther
America Fan Club (USA)
Emission Lab
Tube ComparisonTable
(Japan)