{"product_id":"5w-driver-amp-circuit-board","title":"5W Driver Amp Circuit Board","description":"\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc\"\u003eHere is a 5W output 1-55 MHz amplifier for stand-alone QRP operation or to drive the 100W MRF101 or 500W  AN1819 amplifiers to full power with lower drive level.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc\"\u003eThe amp can be built with only the output stage for a drive of 100-200 mW or add an MMIC to lower the drive to the 1-2 mW range.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc\"\u003eThe circuit uses a NXP AFT09MS015N with a 4:1 output transformer which can develop over 7W with 13.8V DC input. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc\"\u003eThe gain is about 20 dB with the output stage alone and about 40 dB with the MMIC. The input has a place for a resistive attenuator so you can adjust the gain for your system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc\"\u003eIf you don't need the pre-driver, put 0 ohm resistors in for C14 and C15 and don't populate U1, C2, C12, C13, C16 and L2. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc\"\u003eNXP recommends 100 mA bias so set VR1 for 10 mV across R5.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc\"\u003eA heatsink is required for operation. The hole pattern is for an 1\/8th brick DC-DC converter heatsink like a\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003ca class=\"XqQF9c\" href=\"https:\/\/wakefieldthermal.com\/wakefield-thermal-1-8-brick-heatsink-57-9x55x23-9m-567-94ab\/\" target=\"_blank\"\u003e\u003cspan class=\"C9DxTc aw5Odc\"\u003eWakefield 567-94AB.\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"zfr3Q CDt4Ke\"\u003e\u003cspan class=\"C9DxTc aw5Odc\"\u003eMore details can be found on our \u003ca href=\"https:\/\/sites.google.com\/site\/rfpowertools\/rf-power-tools\/5w-driver-amp?authuser=0\"\u003etech site\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"Jim Veatch","offers":[{"title":"Default Title","offer_id":52999780172085,"sku":null,"price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/3240\/5045\/files\/5wAmp.png?v=1781464798","url":"https:\/\/rfpowertools.com\/products\/5w-driver-amp-circuit-board","provider":"HobbyPCB","version":"1.0","type":"link"}