International Servicemaster 12AX7A/ECC83 – Grey Short Plate Top Ring Getter Made in Japan
NOS Single Tube
New In White Box
Grey Short Plate
Top Ring Getter
New In White Box
Grey Short Plate
Top Ring Getter
Offering a premium New Old Stock (NOS) 1 Pc International 12AX7A (Servicemaster), Serial No. 4494001. This high-quality valve was Made in Japan and features Grey Short Plates with a Top Ring Getter. Known for low microphonics and reliable performance, this tube is supplied in a New White Box and has been precision characterized on the Amplitrex AT1000.
- Type: 12AX7A / ECC83 Brand: International Servicemaster
- Condition: New in White Box Construction: Grey Short Plate/Top Ring Getter
- Origin: Made in Japan Testing: Amplitrex AT1000
Laboratory Characterization: Tested against factory reference parameters for 12AX7A . This unit demonstrates exceptional strength, testing significantly above nominal ratings for both plate current and transconductance.
⚠️ 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 |
|---|---|---|---|---|---|---|---|
| 4494001 | T1 | 1.2 | 1.7 | 141% | 1600 | 2000 | 125% |
| T2 | 1.2 | 1.6 | 133% | 1600 | 1900 | 118% |
✉️ For technical inquiries, please Email us at [email protected]
Whatsapp: +1 (630) 597-3966
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