TELEFUNKEN UF89 – SINGLE TUBE (1 PC)
GRADE: PLATINUM SERIES | VINTAGE GERMANY MANUFACTURE
Telefunken (TFK) Vintage Pentode
UF89 Specification
Black Plate
Top Ring Getter
New in Original Box
AVO Type 160 Tested
Up for sale is a single piece (1 PC) prime vintage NOS Telefunken (TFK) UF89 RF/IF pentode vacuum tube, complete in its original Telefunken box. Manufactured in Germany, this sought-after valve features dark black plates, a classic top ring getter, iconic white screen print logo, and precise German construction. Highly regarded by vintage radio restorers and audio enthusiasts for low-noise performance, high gain stability, and exceptional durability.
This tube has been thoroughly tested on an AVO Type 160 valve tester at nominal reference settings. Anode Current (Ia) and Transconductance (mA/V) measurements alongside percentage performance ratings relative to standard factory specifications (10.5 mA ,4.4mA/V) are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ia) | Transconductance (mA/V) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ia | Ref Spec | Result | % Gm | ||
| SR.NO. 5392001 | Pentode | 10.5 mA | 10.5 mA | 100% | 4.4 mA/V | 4.4 mA/V | 100% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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