For sale one tube EF14 Telefunken made in Germany original vintage steel  tube preamp

original black steel tube Telefunken <> gold pins, engraved top logo Telefunken diamond 

one tube = one valve = one piece 

test results Ia = 10.5mA with 200 volt on anode 

reference good Ia = 7mA (with 200 volt on anode)

reference 100% Ia = 12mA (with 200 volt on anode)

black paint in  perfect conditions

no rust or scratches with carton wrap (no box but carton wrap)

vintage military tube for postal service amplifier station

Original vintage spare part rare tube

great vintage tube for neumann microphone

heater voltage is 6.3 Volt 

socket german steel base y8a

this listing is for one piece = one tube 

more pieces from the same old stock are available on request 

this ef14 tube is employed nowadays in a lot of Neumann Telefunken u47 clone microphones like

Flea 47

Wunder audio cm7

Telefunken elektroakustic u47m

and many more diy microphones with excellent audio performance results  

ef14 Telefunken is a 6,3 volt filament / heater version of the extremely rare and expensive vf14 Telefunken used in Neumann u47 u48 microphone 

Filament Heater Vf 6.3 Volt / If 0.47 Ampere / Indirect

type Pentode 

Box 190

ref 6