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

Porex
Products include pipette tips, sample collection, blood serum filters, test tubes, storage tubes.
http://www.porex.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/

Test Mentor Java Edition
The Object Testing Company, World-Wide Leaders in Java and Smalltalk Testing
http://www.silvermark.com/Product/java/stm/index.html

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

SPS electronic UK limited
Automated and manual electrical safety test equipment. Flash test, earth bond test, insulation test and leakage test devices.
http://www.spselectronic.co.uk/

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