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 VF 14 M NOS Tube For Neumann U47 U48. Pick Of The Litter. Most Quiet, Gorgeous One. | Reverb France
Telefunken VF14K | TubeDepot.com
VF14K Vacuum Tube (U47, U48) — Studio Analysis
Telefunken (Neumann) U47 + M7 capsule + VF14M tube FOR SALE - Soundgas
Telefunken VF14 Tube for U 47 / U 48 | Reverb France
Documents, presets, manuels Telefunken / Siemens VF14 M - Audiofanzine