{"type":"firestarter.listing","listing":{"id":"lst_rGiEZHvf","product_name":"Archive Tubes 6H8C/ 6SN7GT Vacuum Tube","category":"Vacuum Tube","description":"The 6H8C is a dual triode manufactured in Soviet-era tube factories from the postwar period through the late twentieth century for use in industrial, communications, and audio equipment. Developed as part of the USSR’s domestic receiving tube program, the 6H8C was built to provide a rugged, standardized medium-mu dual triode comparable to established Western designs while supporting the needs of military and civilian electronics production. The plate getter structure and robust Soviet manufacturing reflect the durable construction practices commonly found in Russian small-signal tubes of the period.\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: Russian 6H8C 6SN7GT\n\nGetter Type: Plate Getter\n\nBase Type: Black Base\n\nMade in: USSR\n\nBox Type: NOS in Original Box\n\nTested on: Amplitrex AT1000 Advanced Digital Tube Tester\n","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6H8C_6.jpg?v=1783016037","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6H8C_5.jpg?v=1783016037","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6H8C_4.jpg?v=1783016037","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6H8C_3.jpg?v=1783016037","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6H8C_2.jpg?v=1783016036","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/RUSSIAN6H8C_1.jpg?v=1783016037"],"price":172,"currency":"USD","in_stock":true,"inventory_qty":89991,"dynamic_pricing":false,"listed_at":"2026-07-08T04:00:47.281Z"},"share_url":"https://firestarter.network/l/lst_rGiEZHvf","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_rGiEZHvf' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Archive Tubes 6H8C/ 6SN7GT Vacuum Tube' and a budget_max comfortably above $172.00 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."]}}