Tubes

- www.tubeampdoctor.com
- www.btb-elektronik.de
- www.tube-town.net
- www.thetubestore.com
- www.tubesandmore.com
- www.ebay.com
- www.verelec.com
- www.jukebox-revival.nl
- www.tonefactory.nl
- www.roehrenendstufen.de - Ritter Electronic Systems
- www.tube-audio.de

Info on different ECC83 tubes:
- TubeStore.com
- Brent Jessee recording.com

Coupling capacitors

- ClarityCap SA series
- Caps & Coils, distributor ClarityCap [NL, DE, GB]
- World Designs HiFi World, Soniqs SA / OEM ClarityCaps
- ICEL PHC series
- Solen MKP series

Electrolytic capacitors

- Schuro [DE]
- Conrad [EU]
- Farnell [EU]

Resistors

- Intertechnik MOX series

You might like to check out your local loudspeaker DIY shop for the Intertechnik MOX series resistors.

Output relay

- Amplimo [EU/NL]

Semiconductors

- Farnell Electronic Components [EU] ; original Toshiba 2SC5200
- DigiKey [USA] ; original Toshiba 2SC5200
- Cricklewood Electronics [UK] ; original Toshiba 2SC5200
- Profusion PLC [UK] ; original Toshiba 2SC5200
- BMM Electronics [EU+NL] ; original Toshiba 2SC5200
- Nikko Electronics [UK] ; they sell original Toshiba & Chinese 2SC5200
- T+S Audiosystems [DE] ; original Toshiba 2SC5200
- Ampslab.com [USA] ; 2SC2073 + 2SA940 Drivers
- Newark.com ; 2SC2073 + 2SA940 Drivers

Transformers

- Amplimo toriodal power transformers [EU/NL]
- www.tube-audio.de [DE]

Housing

- Housing as used in MUGEN project as shown in Elektuur/Elektor issue 10 2007
- Schuro [DE]