1. This Balun Is A 49:1 Balun Dedicated To End-Fed Antennas. It Only Needs To Be Equipped With A 20-Meter-Long Vibrator (Remember That The Standard 20 Meters) Can Naturally Resonate In The Four Amateur Bands Of 7, 14, 21, And 28, And The Height Changing The Resonance Point Has Little Effect 2. It Is Very Suitable For Ham With Certain Hands-On Ability (You Can Make A 20-Meter-Long Vibrator By Yourself) 3. The Magnetic Ring, The M Seat Is Also Customized And Lengthened (The Short M Seat Is Connected To The M Male Head, And It Is Still Loose), And The Magnetic Ring Is Fixed By Pcb For Long-Term Stability And Reliability. 4. Main Parameters: 5-35MHZ Standing Wave Less Than 1.5, Insertion Loss Less Than 1.5db, Withstand Power 100W PEP (SSB) 5. The Balun Has Passed The Continuous Transmission Test For Up To 30 Minutes And Passed The Test Safely. The Parameters Are All Actual Standards, And It Is Never Considered To Be 150W. Type:Shortwave Antenna Barron Model:End-Fed Antenna 49:1 Note: The Advantage Of End-Fed Balun Is That The Bandwidth And Gain Are Natural Resonant Antenna In number one, The Disadvantage Is That The Loss Is The Conventional Balun, So -Fed Balun Can Not Be Used For A Long Time In Continuous Use, Withstand Power 100wpep (Pep Is The Power) Data Communication 100w Is The Power Of The Doubled, Remember That The Fm And Data Communication Ft8 And Other Modes Of Power To Reduce Power By Half To Use! Colour:As shown (due to the lighting of the photo, the color may have chromatic aberration, which does not affect use) Material:ABS Size:120x80x30mm Package Contents: 1 * End Fed Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.