Not just an replacement, but an improvement!

After 45 years,  the original American type "45" tube is now back in production again, and we have called it  "Type 45".   This tube is constructed for low  microphony. All critical parts, like filaments and  grids  are made of hard metal for higher reliability and reproducable quality.  They have 4  four original V-shaped filaments like found in most 45's. 

Features

• Mesh window plate 
• Wolfram Grids (Note1)
• Wolfram Grids (Note1)
• Two extra large getters, flashing the complete tube bottem. 
• Hand blown ST Glass bulb
• Anti-microphonic plate- and grid  suspension
• These tubes are shipped in a high quality dual box
• Tube pinting with real gold (metal),  red color is burned into the glass 
• Machined, solid tube base pins for highest contact precision. Ideal for the YAMAMOTO tube sockets. 
• Gold plated pins,  black ceramic socket.  (White bottem)

• Note 1)  Hard-metal filaments prevent filament breakage with DHT Tubes.  This material has a higher melting point than the classical nickel wires. Wolfram grids  allow the most precise grid wire distance, because wolfram is an extreme hard metal.   This ensures better grid  precision, which gives uniformity and better linearity at the low end of the tube currves.
• Note 2)  Individual Test data, such as:  Matching Data, Grid Current, Vacuum, Filament Current, etc,  are on the Certificate that comes with each individual Tube.  Each tube is numbered, inside the bulb  with a metal Tag
• Note 3)  Tube Curves:  Made on the The Sofia Curve tracer, with courtesy of AMR, Wisconsin, USA.