{"type":"firestarter.listing","listing":{"id":"lst_3bn7nH7o","product_name":"Archive Tubes 6L6GC/ 6N3C Vacuum Tube","category":"Vacuum Tube","description":"The 6L6GC / 6N3C is a Soviet-produced beam power tube manufactured for use in high-power audio amplification and industrial electronics during the Cold War era. As part of the long-running 6L6 family, the type reflects the Soviet Union’s adaptation of a proven Western beam tetrode design that became a standard output tube in both Hi-Fi and instrument amplifiers. These examples feature the desirable Bottom Inverted Cup Getter and Long Grey Plate construction, a rugged internal design with stable operation, efficient heat dissipation, and long service life.\nArchive Assessed, Apos Assured\nAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\nAre the tubes...dusty...?\nBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\nSpecs\n\n\nBrand / Type: 6L6GC / 6N3C\n\nGetter Type: Bottom Inverted Cup Getter\n\nPlate Type: Long Grey Plate\n\nBase Type: Black Base\n\nMade in: USSR\n\nBox Type: NOS in New White Box\n\nTested on: Amplitrex AT1000 Advanced Digital Tube Tester\n","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6L6GC_5.jpg?v=1783356880","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6L6GC_2.jpg?v=1783356880","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6L6GC_6.jpg?v=1783356880","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6L6GC_1.jpg?v=1783356879","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6L6GC_3.jpg?v=1783356879","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6L6GC_4.jpg?v=1783356879","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6L6GC_5_a3383598-8a07-441d-a724-dc0334433851.jpg?v=1783495781"],"price":250,"currency":"USD","in_stock":true,"inventory_qty":89991,"dynamic_pricing":false,"listed_at":"2026-07-08T04:00:47.271Z"},"share_url":"https://firestarter.network/l/lst_3bn7nH7o","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_3bn7nH7o' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Archive Tubes 6L6GC/ 6N3C Vacuum Tube' and a budget_max comfortably above $250.00 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}