TESLA E180F / 6688
GRADE: GOLD SERIES | LABORATORY VERIFIED | NOS/VINTAGE STOCK
Top Ring Getter
Gold Pin Series
Amplitrex AT1000 Verified
This listing is for a single vintage Tesla E180F pentode. Manufactured in Czechoslovakia to high military standards, these valves feature Grey Plates and Gold Pins, engineered for stable performance and long service life in high-end audio and precision laboratory circuits.
The unit has been laboratory-verified on our Amplitrex AT1000 digital tester. Using the Percentage Method, the result below displays the performance relative to 100% factory design-center specifications (Ip = 13.0mA / Gm = 16500 µMhos).
| Serial No. | Parameter Ip | Result Ip | % Ip | Parameter Gm | Result Gm | % Gm |
|---|---|---|---|---|---|---|
| #3922001 | 13.0 | 8.0 | 61.5% | 16500 | 16600 | 100.6% |
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Support: [email protected] Precision Verified — NOS Audio Tubes
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