Not just an replacement, but an improvement!

45 years after the last American tubes of "Type 45" were made, EML was the first company taking this tube back in production again. This was in the year 2001, and at that time it we called it VV45.   This tube is constructed for low  microphonics All critical parts, like filaments and  grids  are made of hard metal for higher reliability and reproducible quality.  They have 4  four original V-shaped filaments like found in vintage 45 tubes. This tube has fully original specifications of the American RCA Type. 

Features 

• Gold plated Grid
• Center tapped filament
• 30% lower distortion compared to any other 45. Read here.
• Hard metal Construction (Note1)
• Two extra large getters
• Hand blown Glass bulb
• Anti-microphonic plate- and grid  suspension
• These tubes are shipped in a high quality dual box
• Tube printing with real gold (metal),  red color is glass burned into the glass 
• Machined, solid tube base pins for highest contact precision. YAMAMOTO tube sockets highly recommended. 
• Gold plated pins,  black ceramic socket.  (White bottom.)

• 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 curves
• 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.