{"product_id":"swr-afstel-set","title":"SWR meter with jumper cable","description":"\u003cp\u003e\u003cstrong\u003eSWR kit – Precise tuning for your 27MHz antenna\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDo you want to precisely tune the SWR of your 27MHz antenna? This SWR kit includes a CRT-1 SWR meter and a 90 cm jumper cable, allowing you to easily achieve optimal tuning. A correct SWR value is essential for a long transmission range and prevents damage to your CB device.\u003c\/p\u003e\n\u003cp\u003eWith this set, you can accurately measure the SWR value and properly tune your antenna. Please note that the measurement should be performed outdoors, in an open environment, for the best results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to correctly tune the SWR of your 27MC CB antenna\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA correct SWR (Standing Wave Ratio) adjustment is essential for an optimal transmission range and to prevent damage to your CB device. Follow the steps below carefully to get the best performance from your antenna.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep 1: Preparation\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\n\u003cli\u003ePlace your vehicle or antenna in an open environment – Avoid tall buildings, trees, or metal structures in the immediate vicinity.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eConnect the CB device to a stable power source (~13.8V).\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eUse the included jumper cable to properly connect the SWR meter:\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\u003cp\u003eConnect the CB radio to the SWR meter via the RTX connector (Transmitter).\u003cbr\u003eConnect the antenna to the SWR meter via the ANT connector.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep 2: First measurement on channel 1\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\n\u003cli\u003eTurn on your CB radio and select channel 1.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eSet the SWR meter to the ‘FWD’ (Forward) position.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003ePress and hold the transmit button (PTT) on the microphone and turn the calibration knob (‘CAL’ or ‘SET’) until the meter deflects to maximum.\u003c\/li\u003e\n\n\u003cli\u003eSwitch the meter to the ‘REF’ (Reflected) position and note the measured SWR value.\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eStep 3: Measurements on channel 20 and channel 40\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRepeat the above procedure on channel 20 and channel 40.\u003cbr\u003eCompare the three measured SWR values to determine if the antenna is too long or too short.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep 4: Adjusting the antenna based on measurements\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eIs the SWR too high on channel 1? → Antenna needs to be longer.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eIs the SWR too high on channel 40? → Antenna needs to be shorter.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWays to adjust the antenna\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDepending on your antenna type, adjust the length as follows:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLoosen the top nut\u003c\/strong\u003e: For antennas with an adjustable top, you can slide the top part in or out and then secure it again. These antennas sometimes have a removable cap (antenna tip cap) that you must remove first to access the adjustment screw.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLoosen the hex bolt:\u003c\/strong\u003e For some magnetic antennas and models like the Stinger, use a small hex key to slide the antenna whip in or out.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eScrew in or out:\u003c\/strong\u003e For fiberglass antennas (such as the Firestik), remove the rubber cap and turn the screw to adjust the length.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eStep 5: Repeating the measurements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePerform measurements again on channels 1, 20, and 40. Adjust the antenna again if necessary until the \u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eSWR is as low as possible\u003c\/span\u003e\u003c\/strong\u003e (ideally between 1.2 and 1.5, \u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003enever in the red area\u003c\/span\u003e\u003c\/strong\u003e).\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep 6: Completion and check\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\n\u003cli\u003eSecurely tighten the top nut, hex bolt, or screw to maintain the antenna adjustment.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eCheck that all cables are properly connected and that the antenna is firmly in place.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eRemove the SWR meter and connect the antenna directly to your CB device.\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eImportant tips:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDo not stand too close to the antenna during measurement, as this can affect the reading.\u003cbr\u003eKeep transmit time during measurements as short as possible to prevent overheating.\u003cbr\u003eSet the CB radio's power as low as possible to prevent incorrect measurements.\u003c\/p\u003e\n\u003cp\u003eWith these steps, you will get the most out of your 27MC CB antenna and enjoy an optimal transmission range!\u003c\/p\u003e\n\u003cdiv class=\"text-media__text\"\u003e\n\n\u003cp align=\"left\" class=\"western\"\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e","brand":"CRT","offers":[{"title":"Default Title","offer_id":55261842768254,"sku":"SWRPAK","price":27.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/3052\/8953\/files\/SWR-afstel_pakket.webp?v=1740764863","url":"https:\/\/www.deltron.nl\/en\/products\/swr-afstel-set","provider":"Deltron","version":"1.0","type":"link"}