RCA 12AX7A – Vintage U.S. Production Short Grey Plate Top Ring Getter
NOS Matched Pair
White Box
Short Grey Plate
Top Ring Getter
White Box
Short Grey Plate
Top Ring Getter
Offering a premium New Old Stock (NOS) matched pair of 2 Pcs RCA 12AX7A high-mu dual triodes, Serial Nos. 4692015 and 4692017. These iconic American-made tubes feature Short Grey Plates and a Top Ring Getter. RCA 12AX7A tubes are a gold standard in the audio world, renowned for their low noise, high reliability, and warm, classic “American sound”. Both units are supplied in New White Boxes and have been precision characterized on the Amplitrex AT1000.
- Type: 12AX7A Brand: RCA
- Condition: New in White Box Construction: Short Grey Plate / Top Ring Getter
- Origin: Made in USA Testing: Amplitrex AT1000
Laboratory Characterization: Tested against factory reference parameters for 12AX7A . This pair is exceptionally well-matched, with both tubes reaching 1700 uMhos 106% on their strongest triode.
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
| Sr. No. | Test Triode | Parameter Ip (mAdc) | Result Ip (mAdc) | Percentage Ip | Parameter Gm (uMhos) | Result Gm (uMhos) | Percentage Gm |
|---|---|---|---|---|---|---|---|
| 4692015 | T1 | 1.2 | 1.0 | 83% | 1600 | 1600 | 100% |
| T2 | 1.2 | 1.1 | 92% | 1600 | 1700 | 106% | |
| 4692017 | T1 | 1.2 | 1.0 | 83% | 1600 | 1600 | 100% |
| T2 | 1.2 | 1.2 | 100% | 1600 | 1700 | 106% |
✉️ For technical inquiries, please Email us at [email protected]
Whatsapp: +1 (630) 597-3966
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