49:1 Balun For 5-35MHZ End Fed Half-Wave Antenna 100W PEP for HAM Radio Features: This balun is a 49:1 balun for end-fed antennas It only needs to be matched to a 20 meter long oscillator(remember,this is standard 20 meters) It resonates naturally on the 7,14,21 and 28 amateur frequency bands. And the resonance point has very little height variation,making it ideal for HAMs with some hands-on experience (Just make your own 20 meter oscillator),the magnetic ring is a specially custom made magnetic ring M holder is also customized and can be lengthened(short M holder mounted on the M male screwed to the bottom or loosened) The magnetic ring is fixed by PCB,which is stable and reliable for long-term work Specification: Size:about 120*80*30MM Weight:about 180g 5-35MHZ VSW less than 1.5 insertion loss less than 1.5DB withstand power 100W PEP(SSB) Barron is safe and passed up to 30 minutes of continuous emission test These parameters are true to standard,we never considered labeled as 150W Package includse: 1*End-feed antenna 49:1 balun Note: Only the above package is included Specification parameters are manually tested and are for reference only Please refer to the actual product,thanks The advantage of end-fed balun is NO:~1 bandwidth and gain in natural resonant antenna The disadvantage is that the loss is larger than the traditional balun, so the end-fed balun can't be used continuously for a long time Withstand power 100WPEP(PEP is peak power)data communication 100W is twice the peak power Remember that the power in modes such as FM and data communication FT8 is used in half