Toshiba 12AX7/ECC83 – Black Plate Top Ring Getter Made in Japan
NOS Single Tube
New In Original Box
Black Plate
Top Ring Getter
New In Original Box
Black Plate
Top Ring Getter
Offering a premium New Old Stock (NOS) 1 Pc Toshiba 12AX7 dual triode, Serial No. 4657001. This authentic Japanese-made valve features high-quality Black Plates and a Top Ring Getter. Prized by audiophiles for its smooth, balanced frequency response and low noise floor, this tube is supplied in its Original Toshiba Box and has been precision characterized on the Amplitrex AT1000.
- Type: 12AX7 / ECC83 Brand: Toshiba
- Condition: New in Original Box Construction: Black Plate / Top Ring Getter
- Origin: Made in Japan Testing: Amplitrex AT1000
Laboratory Characterization: Tested against factory reference parameters for 12AX7 ($I_p=1.2$, $G_m=1600$). This unit demonstrates exceptional health, testing well above nominal transconductance and plate current specifications.
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
| Sr. No. | Test Triode | Parameter Ip (mA) | Result Ip (mAdc) | Percentage Ip | Parameter Gm (uMhos) | Result Gm (uMhos) | Percentage Gm |
|---|---|---|---|---|---|---|---|
| 4657001 | T1 | 1.2 | 1.4 | 117% | 1600 | 1700 | 106% |
| T2 | 1.2 | 1.5 | 125% | 1600 | 1800 | 113% |
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