845 RF Parts Transmitting Tube. Made in China. The 845 tube has a bayonet mount and thoriated filaments which glow like lightbulbs when powered up. The glass envelope is about 2-5/16" in
845 @ The Valve Museum
KR Audio Tube 845 M
6moons audio reviews: Art Audio Carissa 845 SET Amplifier
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Shuguang 845B Audio Tubes - www.thetubestore.com
HIFi Tube Review: PSVANE 845 WE. Magic or Overpriced Dud? | Steve Huff Hi-Fi and Photo