Telefunken VF14 - a very rare audio tube for Neumann microphone - MONODYN SPEZIALGESCHÄFT
Neumann U47 - The VF14 is a pentode, meaning it has five electrodes, including three grids. When used in a microphone, however, it operates as a triode, with two of its grids
Telefunken really? | Realgearonline
NOS Telefunken VF14 Microphone Tube | TubeDepot.com
Microphone Shop - I'm near finishing #VF14 tube replacement! It is real tube (nuvistor) inside and low-noise DC-DC converter to provide proper heater voltage. #U47 #M49 #U49 | Facebook
U47/VF14 problem.
Documents, presets, manuels Telefunken / Siemens VF14 M - Audiofanzine