TubeTronic
tubetronic.com
http://www.tubetronic.com/

Phamitech International Company Ltd
Exporter of electron tubes, TWT, valves, thyratrons, magnetrons, klystrons, transmitting tubes, heating tubes, vacuum interrupters and X-ray tubes made in China
http://www.phamitech.com

Daily Electronics
Retailor of electron tubes and vacuum tubes, plus new and hard-to-find obsolete tubes.
http://www.dailyelectronics.net/

PSP-Tubes.com
PSP Tubes for Paint Shop Pro 6, 7 and 8. Free downloads. Tutorials. Members area for unlimited downloads.
http://www.psp-tubes.com/

Zeitmann tubes
We have NEW and used ECC81 ECC82 ECC83 ECC85 E88CC EL84 and EF86 Tungsram vacuum tubes.
http://www.zeitmann-tubes.com/

TAI Services
NDT nondestructive inspection of tubes, eddy current testing on chiller tubes, flux Leakage testing on boiler tubes.
http://www.taiservices.com

Vacuum Tubes, Inc.
Worldwide sellers of vacuum tubes and electron tubes for audio, radio, and industry
http://www.vacuumtubesinc.com/

Duncan's Amp Pages
Duncan's Amp Pages - Internet resource for guitar amps and vacuum tubes
http://www.duncanamps.com/

CompoTech Structural Composite Tubes
Design, product development and manufacture of high performance FW composite tubes for industrial applications, drive shafts, hydraulic and pneumatic cylinders. Marine tubes. Aaxial fibre filament laying process in carbon, glass or aramid. [IOW, UK]
http://compotech.com

Ensign Condenser Tube Protection
Ensign nylon tube insert. High quality self expanding nylon steam condenser tube insert and heat exchanger tube insert
http://www.ensign-uk.com/