Magazines / Books

	AudioXpress [USA]
	Electronics World [UK]
	TubeCad by John Broskie [USA]
	Elektuur/Elektor [NL/GER/UK/FR], also US edition available

Components

	Amplimo Toriodal output transformers [NL]
	BMM Electronics Power MosFets, tubes and other audio parts [NL]
	JAC Music Tubes, coupling capacitors, tube sockets and other audio parts [Germany]
	PartsConnexion Tubes, coupling capacitors, tube sockets and other audio parts [Canada]
	Triode Electronics Tubes, capacitors, tube data and schematics [USA]
	Crafty Caps & Coils Dutch supplier ClarityCap SA capacitors [NL]
	Audiophonics French supplier audio parts, audio kits and enclosures [FR]
	Selectronic French supplier for audio parts [FR]
	Audio Upgrades supplier for audio components / upgrades [UK]

Datasheets & Theory

	Franck's Electron Tube Datasheets All the info you need regarding tubes
	Tube info All about tube scheme and numbering
	Article on Ground Loop problems

Audio Kits / Circuit Boards

	Audioworkshop DIY Digial-to-Analog convertors
	ASE Audiotuning IC Adapter Boards
	Naim NCC200 Amp Circuitboards and circuit DIY Naim NCC200
	Diy HiFi Supply Tube related kits and componentsKitsparts Store
	Kits & circuit boards: DACs, preamps (Jadis, Marantz, Matisse), amplfier tubes (Marantz), amplifier solid state (Accuphase, single ended)

Ebay shop links

	DIY-Gene - audio kits, ciruits boards, LITE & MHZS products
	Vintage-Audio-Lab - diy audio stuff, grid choke
	Diy_hifi_supply50 - diy audio stuff, Obbligato capacitors
	Vintage-and-High-End-Audio-from-OBS - Hashimoto Electric Japan, outputtransformers
	Townsend-Tube-Works - Subminiature tubes
	Tubeshunter - audio kits, circuit boards
	8Audio - Jadi EL34 clone, LM3886 kits, 24 Step Ladder Type Stereo Volume Attenuator
	Audiotek - out-of-business
	Classic Components - new & NOS tubes, German Ebay shop; very good products/service
	Kikitronic - preamp & poweramp kits and input selector circuitry
	Nimo e-store - TDA7294 & LM3886 PCBs / kits
	CTech electronics - tubes, also authorized New Sensor dealer, Power Supply Capacitor Refurbish KitsRaindrop_hui
	- TDA1541 DAC, DIR9001 Digital receiver CS8412/CS8414 conversion kit

Other websites of interest

	Tubelab Inc. by George Anderson DIY tube audio - USA
	Website by Patrick Turner a must, the education+DIY section is great - Australia
	Moxtone by Master M
	interesting and high quality projects for DIY audio
	Evolve amplifiers Interesting DIY Amplifiers - Japan