ottriodpag Studio SchematicsOnline schematics for assorted Mic Preamps, Compressors, F/X and assorted Studio & Music Electronics Why Tubes Sound Better ST70 Troubleshooting & Triode Connecting Information ST-70 Mic Preamp Project Altec Page Dusty Files I Dusty Files II EIA-RETMA Codes for US Electronic Parts Area 51 Mega Ongaku! Old Tube Ads Why Tubes Sound Better ST70 Troubleshooting & Triode Connecting Information RAT Tube Tester Project By Steve Bench So you want to open a tube factory? Qualty Control in Radio Tube Manufacture Some Aspects of Radio Valve Manufacture Practical Considerations in the Design of Low Microphonic Tubes The Manufacture of Vacuum Detectors Vacuum Insertion of Heaters Mass Spectrometry in Electron Tube Manufacture Materials for Vacuum Tube Manufacture Anode Materials for High Vacuum Tubes Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com