BD-Design Famous for the Oris front horns, very good dealer for speakers

Halfin One of the worlds largest tube suppliers

Triode Electronics Ned Carlson's excellent site with very nice tube components and info

Gold Point stepped attenuators Very nice stepped attentuators

New Sensor Tubes, datasheets & schematics

Parts Connexion Tubes and other DIY components

EIFL Export Supplier of Tango and other transformers

Lundahl Scandinavian transformer manufacturer

Sowter UK iron manufacturer

Jensen Capacitors Paper-in-Oil capacitors

SAS Audio Labs

Rainbow Electronics