20W Magnetic QRP Antenna Loop Antenna For High Frequency Transceiver Icom-705 YU

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Thus, allowing you to enjoy multi-band reception and communication indoors, windows, balconies and outdoors.Specifications:Frequency Range:144—148MHz430-440MHz7—30MHzaeronautical bandFM radio also provides excellent receptionTuning box:Band selection switch, pull up 7MHz, pull down 14-30MHzThe upper knob is the frequency tuning knob, and the frequency tuning value does not change due to changes in the environment.The lower knob is the impedance matching knob, and the impedance matching value will change due to changes in the environment.Data transfer: 10WSSB: 20Winstallation method:Use the right angle adapter and double male butt to connect the antenna to the m seat on the back of the radio and stand up or connect the ring body to the connector on both sides of the controller and tighten it, then mount the tripod to the mount on the back of the tuner , open the tripod, place the antenna body firmly on the tripod, and finally connect the feeder (the feeder is attached with a choke, and one end of the choke is close to the small loop antenna).Now that the small loop antenna is connected to your station, you can now listen.First, let's introduce the function of the tuner panel. The toggle switch on the left is the frequency band selection switch (upper: 7MHz, lower: 14-30MHz).The main control knob, the upper knob is the frequency tuning knob, and the frequency tuning value will not change due to environmental changes; the lower knob is the impedance matching knob, and the impedance matching value will change due to environmental changes. (The adjustment range of the two knobs is 180 degrees, and the panel value is 0-12).To start using the radio, select the desired frequency, then turn the band switch to the desired band position, then adjust the impedance matching value of the lower knob to 6, and then adjust the upper knob to tune. At this time, pay attention to the background noise of the radio. The more resonance there is, the greater the noise floor of the station. At this point, let the radio transmit (cw, fm, am modes are available), pay attention to the standing wave indication, and fine-tune the frequency tuning knob when transmitting. Since the knob of the portable version has no deceleration function, the fine-tuning method must be more delicate, and the smaller the rotation angle, the better.At this time, it can be observed that the standing wave has obvious changes, but the minimum standing wave ratio is generally not lower than 1.5. At this time, the impedance matching knob needs to be adjusted. It is recommended to randomly adjust the positive and negative 5 scale values, and then repeat the steps of frequency tuning and observing the standing wave ratio. Due to the change of the matching value, there are two possibilities before the comparison, 1: the minimum value of the VSWR decreases; 2 the minimum value of the VSWR increases. If the minimum value of the standing wave ratio becomes lower, the impedance matching adjustment is close to the correct value, and further adjustment is possible. If the minimum value of the standing wave ratio becomes larger,Repeat the above steps to adjust the VSWR of the antenna to 1.0.For VHF and UHF bands, the upper knob is fixed to 12 to the end, and the lower knob can properly adjust the impedance resonance.Note: It is best for outdoor use, indoor use of the antenna as close to the window as possible, in a fully enclosed environment with reinforced concrete, against a wall and other environments, the VSWR of some frequency bands is not ideal.Advanced skills: When the signal is weak, the direction of the antenna can be rotated to improve the signal-to-noise ratio, which is beneficial to reception. The unique gain lobe of the loop antenna gives it horizontal gain directivity when upright. Using its characteristics, multiple signals in the horizontal direction can be selected in a targeted manner, and the co-channel interference in the horizontal direction can also be reduced. Of course, if the interfering signal is extremely strong, much larger than the useful signal that needs to be received, the weakening effect will not be too obvious, and it can still play a weakening role compared to the telescopic antenna.The Scope of Use:HF: 5~30MHzPower: 20WSWR: FM: 76~108MHzVHF + Aviation Band: 110~150MHzUHF: 400~450MHzPackage Included:1X small loop antenna1X2 meters transmitting antenna1X5 meters 50 ohm coaxial cable3X adapter About Us Payment Shipping Terms Contact Us About Us Founded in 2012, VIPJQ have professional development and sales, and are involved in various products, providing customers with various high-quality products. Since its establishment, VIPJQ has always adhered to the service concept of "customer first" and the management concept of "pursuit of quality", and is committed to providing customers with high-quality original designs. We commit to provide you the best innovative, quality products & professional services with competitive prices. We value every customer, and we look forward to providing solutions for your business needs to help your business achieve its goals, please contact us immediately! We are all about you! Payment 1. We Accept Visa, Master, Amex, Google Pay，Discover, Paypal, etc, many payment ways.2. Item will be shipped immediately on the same or next business day of receiving your payment. Shipping US Buyers Parcel will ship via USPS/DHL/FedEx from our United States warehouse Shipping time The item usually will be dispatched within 3 days after you ordered. And it usually takes 3-10 working days to delivery depends on buyers address or other majeure on the way. Service We stand behind everything that we sell and will do everything possible to assure you are satisfied Terms When you receive your purchase if you are not 100% satisfied, please sent me ebay message and we will do our best to meet your expectations. If you still want to return your purchase, simply ship the item(s) back to us and we will refund your original purchase price and the original shipping charge. We must be notified of the intent to return your item within 30 days of receiving the item.How to return1. Please ask us for return address .2.Shipping back the package . 3.Sent us the return tracking number. 4. Refund full to you when we receive the package. Contact Us We can be contacted at any time through eBay messages if you have any questions, comments or product requests. We will respond to you within 24 hours and do our best to help you out!Please give us a chance to resolve the issue before leaving us a feedback. Copyright © 2022 Tongtool

Price: 114.79 USD

Location: Los Angeles, California

End Time: 2024-08-03T15:41:39.000Z

Shipping Cost: 0 USD