{"type":"firestarter.listing","listing":{"id":"lst_Kkl4Fo_L","product_name":"Brimar CV4003 (12AU7) 1960's Military Grade Vacuum Tube","category":"Vacuum Tube","description":"The CV4003 Brimar is a precision dual triode tube, widely used in high-fidelity audio equipment and professional radio applications. Its grey plate construction and ring getter ensure stable operation, low noise, and excellent linearity. Fully tested on Amplitrex AT1000 to guarantee reliability, these tubes come in original Brimar boxes and are ideal for collectors and audiophiles seeking top-quality performance.\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: Brimar 12AU7 / ECC82 / CV4003 / 12AU7A / 12AU7WA / ECC802, / ECC802S / E82CC / ECC186 / 5814 / 5814A / 6189 / 6067 / CV491 / M8136 / B329 / 13D5 / A2293\n\nPlate Type: Gray Plate\n\nGetter Type: Ring Getter\n\nMade in: England\n\nBox Type: NOS in Original Box\n\nTested on: Amplitrex AT1000 Advanced Digital Tube Tested\n","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427190.jpg?v=1771375749","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427189.jpg?v=1771375689","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427188.jpg?v=1771375628","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427192.jpg?v=1771375567","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427193.jpg?v=1771375509","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427191.jpg?v=1771375448","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427194.jpg?v=1771375388","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1220503265.png?v=1771370049"],"price":460,"currency":"USD","in_stock":true,"inventory_qty":89991,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:56.015Z"},"share_url":"https://firestarter.network/l/lst_Kkl4Fo_L","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_Kkl4Fo_L' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Brimar CV4003 (12AU7) 1960's Military Grade Vacuum Tube' and a budget_max comfortably above $460.00 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."]}}