A used Lorenz EL84 in good working order and fair physical condition (the glass is a bit grubby, but I don’t want to clean it too much in case I rub the transfer off.
It has been tested on an Avo Mk3 Valve Tester which can determine both plate current and transconductance and it tests very good.
| Measurement | Actual Readings | Data Book Specification |
|---|---|---|
| ia (mA) | 44 | 48 |
| GM (mA/V) | 14 | 11.3 |
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