easyone Posted April 6, 2018 Share Posted April 6, 2018 Does anyone happen to know what company manufactured the Reliable Selectron 6V6GT tube in the pics? Any help would be appreciated. My first guess would be GE because of the dots above and below the "6V6GT" lettering on the top of the tube. Does anyone know what the "AE 743" written on the base means? Quote Link to comment Share on other sites More sharing options...
easyone Posted April 6, 2018 Author Share Posted April 6, 2018 Here is another tube that has me stumped. Anyone got a guess on this U78 tube's maker? No markings on the glass that I can find and just the U78 and "HB 9" painted in a box. Most likely not a USA brand. ???? Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted April 6, 2018 Share Posted April 6, 2018 16 hours ago, easyone said: Does anyone happen to know what company manufactured the Reliable Selectron 6V6GT tube in the pics? Any help would be appreciated. My first guess would be GE because of the dots above and below the "6V6GT" lettering on the top of the tube. Does anyone know what the "AE 743" written on the base means? RCA actually developed the Selectron tube. Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted April 6, 2018 Share Posted April 6, 2018 35 minutes ago, easyone said: Here is another tube that has me stumped. Anyone got a guess on this U78 tube's maker? No markings on the glass that I can find and just the U78 and "HB 9" painted in a box. Most likely not a USA brand. ???? http://www.vivatubes.com/identifying-vintage-nos-vacuum-tubes-by-brand-country-and-eia-code/ Quote Link to comment Share on other sites More sharing options...
easyone Posted April 6, 2018 Author Share Posted April 6, 2018 Thanks for the input. I have read that page on Vivatubes about ID methods. Still leaves me in the dark on these two tubes. I have read lots of stuff at radiomuseum.org and tubemuseum.org but there are always tubes that do not seem to be easily identified by the normal methods. I did see some info on a Selectron tube by RCA, but it was a memory device and not a 6V6 tube. Quote Link to comment Share on other sites More sharing options...
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