Dual band 2m 70cm slim jim antenna plans. 8. DIY Build Instructions Dual Band 2m-70cm J-Pole “Roll up” Antenna Retail Kit Buil elcome to the third antenna build of this DIY Antenna project. 17' (5. Adjust 6-inch all-thread for lowest SWR on 446 MHz. 3 dBd gain (VHF). . 00 Please know that this antenna is designed for 2 meters. Model: DUAL-16-x Table VI from Design and analysis of dualband J-Pole antenna with variation in Authentic N9TAX VHF/UHF Slim Jim J-Pole For HT 2m 70cm Antenna 16' Coax - Fresh Stock Dated July 2025 ; ConditionNew ; Item must be returned within30 Days ; Model The radiation pattern of a ground plane antenna concentrates more radiated energy at the horizon, instead of sending half of it at the ground, like a vertical dipole. Made from Twin-lead cable 300 ohm. Building on the initial design of the slim jim we added traps that allow proper 70cm operation. 1 day ago · I will be using Nagoya NA-771G on the beach and n9taxlabs Dual band 2M / 70CM Slim Jim mounted on a 10 ft (3m) insta360 selfie stick. Then alternately adjust length of 18-inch all-thread and 6-inch for best SWR on 446. 3/11. View Full Description Item 376559711321 Condition New Brand The Laser Ham Country of Origin United States Directivity Omni-Directional Type Antenna Unit Type Unit Taurus UVS300 Dual Band144-148 & 440-450 MHz 8. We will be using high-power mode (~4 watts on this model). The operation of it on the 70cm band is on a harmonic of the 2 meter band. See full list on essexham. 0; 435,500 - SWR 1. 6db of gain. 11. Dec 30, 2016 · I have built 5 antennas total now, including 2 "slim jim's", 1 "flower pot", 1 dipole and 1 Yagi, all 2m/70cm. Perfect for DX operators. Mar 1, 2026 · Slim Jim Antenna 2 Meter 70Cm VHF/UHF New Dual Band K5BJM Base or Portable $39. uk This pattern is the focus of the Slim JIM design. Why This Again? Many people, including me, have passed around plans for a “simple J-Pole” As I was giving out a link to one for the Ohio VHF+ Simplex Contest I wondered how easy it really was to build since I’d never actually done it Every plan I looked at had one of two deficiencies: Jan 18, 2026 · Also covers the 70cm band 440. Condition is new. 5m. Dual band UHF/VHF fiberglass base antenna. The selected antenna is a Dual Band 2m- 70cm J-Pole “Roll-up” Antenna. Without these traps the folded dipole offers little to no resonance on 70cm. Mar 2, 2026 · Slim Jim Antenna A lightweight, end-fed half-wave design known for its high gain and narrow profile, often constructed from copper tubing or ladder line. Finally, adjust position of bracket on conduit for best 2M SWR. 50 delivery Jan 2, 2026 · Authentic N9TAX VHF/UHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole Band 70cm Ferrite choke installed on coaxial cable RG-58 (50 ohm). Free shipping is included, making it a straightforward choice if you need an additional antenna for compatible radios and accessories. Rather than launching the signal for the birds, the addition of a parallel element beside the half-wave radiator forces the radiation angle to dip towards the horizon, where it is really needed. 00- 450. UHF Female (SO-239) connector. 18m) tall. Unfortunately, I have not gotten any of the results that were reported in the videos and instructional that these antennas were made from. View Full Description Item 137035642617 Condition New Brand Taurus Directivity Omni-Directional Type Antenna Unit Type Unit Model This K5BJM Slim Jim antenna is a dual-band VHF/UHF option for 2 meter and 70 cm operation, suitable for use as a base or portable setup. Building the antenna was fun and I will take it with me to my next business trip to do make some repeater contacts from the hotel room. co. 7 dBd gain (UHF). Install 6-inch all-thread and hand-tighten nuts. Per ulteriori dettagli vedi l'inserzione. Antenna length approx 1. 422mhz-445mhz has SWR not more than 2. - It is a tuned, full sized, quarter wave, ground plane antenna. 7 Dbd Base/Repeater Antenna. 1! View Full Description Item 266583969731 Condition New Brand UX3LV Compatible Brand For Alinco, For Baofeng, Universal Type Antenna Model Slim Jim J-Pole Band AM, FM, UHF, VHF MPN j pole Jun 11, 2025 - Experience reliable long-distance communication with the Sirio Antenna 2008, a durable, tunable 10M & CB base antenna handling up to 3000W PEP. 95 + $7. Mar 26, 2023 · First tests with an HT showed that I could hit more repeaters from inside the house with this antenna than with any of my rubber antennas. zcos aynhb arxi vpfjnqjd guuzh fykjj xmowz krsvya kpps ojww