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AL4 Tesla VINTAGE Tested Czech Power Tube
RARE CZECH VINTAGE POWER TUBE 💎 Tesla AL4 output tube from Czechoslovakia, sourced from classic European production and verified on a tube tester for dependable use. Tube Details and Codes 📌 • Type: AL4 power/output tube • Brand: Tesla • Origin: Czechoslovakia • Vintage European stock for collectors and restorers Testing and Performance ⚡ • Test checked on a tube tester • Confirmed operational condition • Suitable for vintage amplifier restoration and replacement use Sonic Signature 🎵 • Classic European tube character with smooth, musical tone • Excellent choice for warm mids and natural harmonic texture
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The Output Heritage Gallery
Explore a curated collection of legacy output tubes, where mid-century manufacturing mastery meets modern laboratory verification to ensure unwavering thermal stability and sonic precision.
Hover image to Zoom | -01KS7MTD94X8YW656GWMZEZXQF.jpg) AL4 Tesla VINTAGE Tested Czech Power Tube | -01KS7MKNBZMV2XPAGESXQN4PGH.jpg) EL12 RFT VINTAGE German Power Tube Test Good | -01KS7JTKPF65VWSH5M9WD68KJG.jpg) 6V6 VT107A Sylvania VINTAGE USA Tested Strong | -01KS7KVT29HKXBK549XZ5D4XVQ.jpg) EL95 6DL5 Siemens VINTAGE Tested Like NOS |  EL12 Tesla VINTAGE Pear-Shaped Smoky Glass Tested Good | -01KS7K8RNS55EKRGE9PR5Z0Y4C.jpg) 6BQ5 EL84 Valvo VINTAGE Tested Good German Power Tube | -01KS7MP95R2TNHAND2NWC5KEVK.jpg) EL95 6DL5 Telefunken VINTAGE Diamond-Bottom Tested | -01KS7MWGP05CR3VKW49W6HSQBR.jpg) EBL21 Tesla VINTAGE Copper Base Output Tube |
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| Price | $82.00 | $84.00 | $86.00 | $73.00 | $84.00 | $93.00 | $79.00 | $84.00 |
| Origin & Factory | Czech vintage Tesla | German vintage RFT | USA-made vintage | German vintage Siemens | Tesla Czech Republic | German vintage Valvo | German Telefunken stock | European vintage Tesla |
| Stock Condition | vintage stock | used vintage stock | used vintage stock | tested old stock | single vintage tube | single tested tube | vintage rare stock | used tested stock |
| Measured Performance | tested on tube tester | tested good functional | tested strong TV-7 | tested like NOS | tested good | tested good TV-7 | visually checked strong emission | verified working properly |
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