Thanks everyone, Perhaps I will try my hand at a small VTTC with these tubes after all! =) Cheers Jay > On March 18, 2018 at 9:44 AM Futuret via Tesla wrote: > > > > Jay, > > > Using a single 4-125A, I obtained a 10" spark if I remember correctly. > Using your two 4-65A's you might get the same spark length I suppose. > Personally I prefer more powerful tubes for a VTTC. > > > John > > > > -----Original Message----- > From: jhowson4 > To: TCML tesla Coil Mailing List > Sent: Sat, Mar 17, 2018 10:31 pm > Subject: [TCML] VTTC tubes > > Hello all,With all the VTTC talk recwntly, I have been thinking. I have a pair of nos amperex 8165/4-65A tetrodes. http://www.relltubes.com/products/Electron-Tubes-Vacuum-Devices/Tetrode/4-65A-8165AM.htmlWhat are everyone's opinions regarding usage in a VTTC?-JaySent from my Verizon 4G LTE Smartphone > _______________________________________________ > Tesla mailing list > Tesla@tedward.pupman mailto:Tesla@tedward.pupman .com > https://www.pupman.com/mailman/listinfo/tesla > _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla