{"type":"firestarter.listing","listing":{"id":"lst_8W2NGeVM","product_name":"Ediswan CV5358 (ECC88) Vacuum Tube","category":"Vacuum Tube","description":"The Ediswan CV5358 is a British military-spec dual triode built for applications where stability, low noise, and long-term reliability were critical. Manufactured by Edison Swan (Ediswan) in the UK, this valve was designed to meet strict government and communications standards, resulting in tight tolerances and consistent performance. In audio power supplies, the CV5358 is valued for its calm, well-regulated behavior, helping amplifiers maintain composure under load and reducing unwanted noise in downstream circuits.\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: Ediswan CV5358 / ECC88\n\nGetter Type: Top Ring Getter\n\nMade in: England\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-ediswan-cv5358-ecc88-vacuum-tube-1218427175.jpg?v=1771374848","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427177.jpg?v=1771374789","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427174.jpg?v=1771374728","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427179.jpg?v=1771374668","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427178.jpg?v=1771374609","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427176.jpg?v=1771374549","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427180.jpg?v=1771374488","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427182.jpg?v=1771374428","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427181.jpg?v=1771374368","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1220503269.png?v=1771367947"],"price":230,"currency":"USD","in_stock":true,"inventory_qty":89991,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:56.004Z"},"share_url":"https://firestarter.network/l/lst_8W2NGeVM","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_8W2NGeVM' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Ediswan CV5358 (ECC88) Vacuum Tube' and a budget_max comfortably above $230.00 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."]}}