{"product_id":"4-gang-am-fm-variable-capacitor-266pf-20pf-x2-500pf-total","title":"4 Gang AM FM Variable Capacitor 266pF 20pF X2 With Screws","description":"\u003cp\u003eThis is one item of new variable capacitor comprising two 266pF AM sections and two 20pF FM sections. Three M2.5 6mm length screws are provided along with three M3 nuts for use as spacers.\u003c\/p\u003e\n\u003cp\u003eAll the sections can be connected together if required to create 572pF in total for receiving loop antennas or for a crystal set tuning capacitor which calls up 500pF. The matching 266pF sections allow use in low power Z-match type antenna matching circuits. The shaft is a standard short type of 6.0mm diameter and it measures 4.0mm across the flats. The thread in the middle of the shaft is M2.5, as are the two mounting holes.\u003c\/p\u003e\n\u003cp\u003eI have this available with a plastic shaft extension and a suitable knobs on another listing in the shop.\u003cbr\u003e\u003cbr\u003eThe trimmer capacitors C1 to C4 on the rear measure about 15pF maximum. These C1 and C2 are internally connected across the two FM sections but C3 and C4 have separate external connections rather than internal connections to the AM sections. All the connections have long, easy to solder tabs or they can even be connected without soldering using 2A terminal block connectors. Connection diagrams are shown in the pictures.\u003cbr\u003e\u003cbr\u003eConnection Diagram Key\u003cbr\u003e\u003cbr\u003eA Common (GND)\u003cbr\u003eB VC1, 20pF + C1 15pF trimmer, FM\u003cbr\u003eC Common (GND)\u003cbr\u003eD VC2, 20pF + C2 15pF trimmer, FM\u003cbr\u003eE VC4, 266pF, AM\u003cbr\u003eF VC3, 266pF, AM\u003cbr\u003eG C4, 15pF trimmer\u003cbr\u003eH Common (GND)\u003cbr\u003eI C3, 15pF trimmer\u003cbr\u003e\u003cbr\u003eHeadline Specs:\u003cbr\u003e\u003cbr\u003eMaximum voltage: 100V DC\u003cbr\u003eMounting bolts: 3X M2.5, 6mm length provided\u003cbr\u003eBolt spacers 3X M3 nuts provided\u003cbr\u003eMounting bolt separation: 14mm\u003cbr\u003eOverall box dimensions: 22 x 22 x 17mm\u003cbr\u003eHeight including shaft: 21mm\u003cbr\u003eShaft length: 4mm normal, 16.5mm with extension\u003c\/p\u003e","brand":"HJW Electronics","offers":[{"title":"Default Title","offer_id":58501255790976,"sku":"VC 2662 202 S","price":5.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/files\/vc_2662_202_s_w.jpg?v=1788188101","url":"https:\/\/shop.usefulcomponents.com\/products\/4-gang-am-fm-variable-capacitor-266pf-20pf-x2-500pf-total","provider":"HJW Electronics","version":"1.0","type":"link"}