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6C51 2C51 5670 6N3P Tesla VINTAGE Tested Strong
RARE VINTAGE TESLA PREAMP TUBE — ACTUAL PHOTO 💎 A highly regarded Eastern European small-signal tube, sourced from Czechoslovakia and tested strong on a TV-7 tube tester. Ideal for discerning audiophile systems seeking vintage tone and reliable performance. Tube Details and Codes 📌 • US equivalents: 6C51 / 2C51 / 5670 / 6N3P • Brand: Tesla • Country of origin: Czechoslovakia • Small-signal dual triode for preamp and line-stage use Testing and Performance ⚡ • Tested strong on TV-7 • Verified used vintage condition • Clean, desirable stock selected for audio applications • Handpicked for stable operation and dependable emissions Sonic Signature 🎵 • Open, smooth midrange with refined detail • Natural harmonic texture and lively dynamics • Excellent choice for warm, musical, high-resolution tube systems
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| Price | $74.00 | $84.00 | $84.00 | $69.00 | $79.00 | $88.00 | $88.00 | $73.00 |
| Origin & Factory | Czechoslovakia vintage | German NOS Telefunken | German NOS stored | Czechoslovak Tesla | German-made Telefunken | German-made vintage | Telefunken, Germany | German/European stock |
| Stock Condition | used vintage stock | new old stock | original box inventory | single vintage tube | new old stock | vintage stock | vintage NOS | vintage hi-fi stock |
| Measured Performance | tested strong TV-7 | verified NOS condition | NOS | tested good | no prior use reported | tested like NOS | tested NOS-like performance | tested good functional |
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