{"product_id":"johansson-kit-7474l2-2437-auto-programming-web-amplifier-5g","title":"Johansson 7474L2\/2437 SMART AMP – 4-Input VHF\/UHF, Auto-Programming \u0026 5G\/LTE Filter","description":"\u003cp\u003eThe Johansson KIT 7474L2\/2437 is an auto-programming web amplifier intended for combining 2, 3, or 4 terrestrial TV antennas for full HDTV reception. Unlike a passive splitter — which causes a minimum 4dB signal loss when combining two antennas and cannot resolve channels sharing the same frequency — this amplifier uses SMART AMP technology to scan all channels automatically, boost the weakest signals, and deliver uniform output power across all channels at 90dBµV.\u003c\/p\u003e\u003cp\u003eThe kit consists of the 7474L2 amplifier and the 2437 dual-output power supply. The amplifier supports LTE band re-use (L2: CH49–69, 694MHz–862MHz, switchable), so channels that share the same frequency can be relocated to the LTE band. SAW filters on all four inputs provide built-in anti-5G and LTE protection. The 2437 power supply is wall or DIN-rail mountable and delivers 12V DC over coax with short-circuit protection.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4 VHF\/UHF inputs, 1 output\u003c\/li\u003e\n\u003cli\u003eSMART AMP automatic channel scanning and equalisation\u003c\/li\u003e\n\u003cli\u003eUniform output power: 90dBµV on all channels\u003c\/li\u003e\n\u003cli\u003eLTE rejection: \u0026gt;40dB (5G, above CH48)\u003c\/li\u003e\n\u003cli\u003eAdjacent channel isolation: \u0026gt;35dB\u003c\/li\u003e\n\u003cli\u003eFrequency range: 174–862MHz (VHF Band III + UHF)\u003c\/li\u003e\n\u003cli\u003eLTE band re-use: L2 = CH49–69 (694MHz–862MHz), switchable ON\/OFF\u003c\/li\u003e\n\u003cli\u003eSAW filters on all inputs for 5G\/LTE protection\u003c\/li\u003e\n\u003cli\u003eInput sensitivity: minimum 40dBµV\u003c\/li\u003e\n\u003cli\u003eAmplifier power: 12V \/ 350mA (DC over coax)\u003c\/li\u003e\n\u003cli\u003eOperating temperature: -20 to +50°C\u003c\/li\u003e\n\u003cli\u003eDC power over coax — no separate cable to the amplifier needed\u003c\/li\u003e\n\u003cli\u003eAll ports ESD protected\u003c\/li\u003e\n\u003cli\u003e2437 power supply: 2 outputs, 12VDC \/ 400mA, AC input 110–240VAC \/ 50–60Hz \/ 6.5W\u003c\/li\u003e\n\u003cli\u003e2437 insertion loss: 4–5dB; isolation between outputs: 10dB\u003c\/li\u003e\n\u003cli\u003eShort-circuit protection and power LED on 2437 power supply\u003c\/li\u003e\n\u003cli\u003eWall or DIN-rail mountable power supply\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Benefits\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEliminates the minimum 4dB loss that a passive combiner causes when joining two antennas, preserving signal strength\u003c\/li\u003e\n\u003cli\u003eResolves same-frequency channel conflicts automatically — channels that would otherwise cancel each other out are relocated to the LTE re-use band\u003c\/li\u003e\n\u003cli\u003eFully automatic channel scan on double power start-up means no manual frequency programming is required after installation\u003c\/li\u003e\n\u003cli\u003eAutomatic country channel plan recognition adapts to the local frequency plan without manual configuration\u003c\/li\u003e\n\u003cli\u003eAdjacent channel isolation above 35dB handles the most difficult near-frequency interference situations\u003c\/li\u003e\n\u003cli\u003eBuilt-in SAW filters on all four inputs protect against 5G interference without needing external filters\u003c\/li\u003e\n\u003cli\u003eDC power over coax simplifies cable routing: only one coax run is needed between the power supply and the amplifier head\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e7474L2 — Inputs \/ Output:\u003c\/strong\u003e 4 inputs \/ 1 output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency range:\u003c\/strong\u003e 174–862MHz (VHF Band III + UHF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput power:\u003c\/strong\u003e 90dBµV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLTE rejection:\u003c\/strong\u003e \u0026gt;40dB (5G, above CH48)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjacent channel isolation:\u003c\/strong\u003e \u0026gt;35dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput sensitivity:\u003c\/strong\u003e minimum 40dBµV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLTE band re-use:\u003c\/strong\u003e L2 = CH49–69 (694MHz–862MHz), switch ON\/OFF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplifier power:\u003c\/strong\u003e 12V \/ 350mA (DC over coax)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e -20 to +50°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLTE protection:\u003c\/strong\u003e SAW filters on all inputs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2437 — Outputs:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2437 — Insertion loss:\u003c\/strong\u003e 4–5dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2437 — Isolation between outputs:\u003c\/strong\u003e 10dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2437 — AC input:\u003c\/strong\u003e 110–240VAC \/ 50–60Hz \/ 6.5W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2437 — DC output:\u003c\/strong\u003e 12VDC \/ 400mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2437 — Mounting:\u003c\/strong\u003e Wall or DIN-rail\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy You'll Love It\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play setup: double power start-up triggers the full automatic channel scan — no laptop or app required\u003c\/li\u003e\n\u003cli\u003eCombining up to 4 antennas in one pass removes the need to choose between coverage areas\u003c\/li\u003e\n\u003cli\u003eThe 2437 power supply includes short-circuit protection and a status LED, making fault-finding straightforward\u003c\/li\u003e\n\u003cli\u003eKit includes: 1x Johansson 7474L2\/2437 amplifier kit, 1x manual, 1x wall clamp\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Johansson","offers":[{"title":"Default Title","offer_id":56577772683646,"sku":"203164","price":143.75,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2250\/3550\/files\/15674764919166.webp?v=1779615513","url":"https:\/\/lynk.gr\/en-eu\/products\/johansson-kit-7474l2-2437-auto-programming-web-amplifier-5g","provider":"Lynk.gr","version":"1.0","type":"link"}