These are highly sought after by collectors and audiophiles. Price is for both tubes. Tube Type: EF40. Getter Type: D-getter. Condition: NOS. Key Features. Test Results. Test conditions: Uf=6.3V, Ua=250V, Ug2=140V, Ug1=-2.0V.
These are highly sought after by collectors and audiophiles. Price is for both tubes. Tube Type: EF40. Getter Type: D-getter. Condition: NOS. Key Features. Test Results. Test conditions: Uf=6.3V, Ua=250V, Ug2=140V, Ug1=-2.0V.