Up for sale is a meticulously matched pair (2 pieces) of ultra-premium Siemens D3a long-life pentodes. Renowned for their extremely high transconductance and low noise, these premium German-manufactured valves feature premium Golden Pins, robust Grey Plates, and a secure Top Ring Getter layout.
Both tubes are New in Original Box and have been professionally verified on our laboratory-grade Amplitrex AT1000 tester. They are exceptionally well-matched, making them ideal for high-end phono stages and demanding audio configurations.
| Serial No. | Parameter Ia mA | Result Ia mA | % Ia | Parameter mA/V | Result mA/V | % mA/V |
|---|---|---|---|---|---|---|
| 3644113 | 22.0 | 11.3 | 51.4% | 35.0 | 26.71 | 76.3% |
| 3644121 | 22.0 | 11.2 | 50.9% | 35.0 | 26.35 | 75.3% |
We are professional specialists in high-quality vacuum tubes with industry roots dating back to the 1970s. With an inventory of approximately 300,000 valves, we utilize industrial-grade Amplitrex AT1000 equipment to provide accurate, transparent test data for audiophiles worldwide.
Note: Custom duties and Taxes are the Responsibility of the Buyer in their Country.
NOS Audio Tubes — Mumbai, India