Description
Pair EL84 tubes in sealed boxes made by Telefunken
Detailed description
Telefunken produced their EL84 pentode tubes in the Berlin factory. Telefunken tubes are considered by many hifi-enthusiasts as the creme the la creme. Telefunken EL84 tubes can be recognised easily by their round plates and the diamond mark in the bottom. Telefunken EL84 is considered as one of the best EL84.
This pair of tubes has never leaved their boxes. So they are untested!
Test method
Mutual transconductance, plate current, gas and shorts tested with: AVO CT-160 (Dutch army tester), Utracer3+, Philips 1532, RFT stabilised power supply and 2x Keithley 2700. Test conditions: Anode 250V, Screen 250V, Grid -7.3V, Filament 6,3V, Rated Ia = 48mA, Gm = 11,3 mA/V. AVO Valve Data Manual 23rd edition 1981 Before testing they were burned in for 48 hours.
Test results*
This pair of Telefunken EL84 tubes in their sealed boxes has not been tested!
| Valve
|
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
– mA
– mA/V
|
NOS
NOS
|
| Valve
|
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
– mA
– mA/V
|
NOS
NOS
|
Summarized description
| Tube type | EL84 |
| Quantity of Tubes | One pair |
| Brand | Telefunken |
| Manufactured in | Berlin, Germany |
| Date code | – |
| Plate Construction | – |
| Getter Construction | – |
| Condition | See pictures |
| Box included | Sealed Telefunken boxes |
| Equivalent tubes: | CV2975 6BQ5 7189 E84L |
| General test results | NOS |
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