Haltron ECC81 / 12AT7 NOS Matched Pair – Grey Ribbed Plate Made in Germany
Double Mica
New In Original Box
Grey Ribbed Plate
Ring Getter
New In Original Box
Grey Ribbed Plate
Ring Getter
Offering a premium matched pair of 2 pcs Haltron ECC81 (12AT7) dual triodes, Serial Nos. 2111002 and 2111001. These authentic West German-manufactured valves feature Grey Ribbed Plates, Double Mica construction, and a Ring Getter. Both units are New Old Stock (NOS) in their original blue and yellow Haltron “Electronic Tube” packaging and have been laboratory tested on the Amplitrex AT1000.
- Type: ECC81 / 12AT7 Brand: Haltron
- Condition: New in Original Box Construction: Grey Rib Plate / Double Mica
- Origin: Made in W. Germany Testing: Amplitrex AT1000
Laboratory Characterization: Tested against factory reference parameters .
Performance: This pair exhibits strong emission and transconductance, with Serial No. 2111001 testing at 108% for plate current and 104% for transconductance.
Performance: This pair exhibits strong emission and transconductance, with Serial No. 2111001 testing at 108% for plate current and 104% for 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 |
|---|---|---|---|---|---|---|---|
| 2111002 | T1 | 10.0 | 7.8 | 78% | 5500 | 4510 | 82% |
| T2 | 10.0 | 8.8 | 88% | 5500 | 5140 | 93% | |
| 2111001 | T1 | 10.0 | 10.8 | 108% | 5500 | 5700 | 104% |
| T2 | 10.0 | 9.0 | 90% | 5500 | 5250 | 95% |
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