Hello Ash,
Your results are normal for a typical Beverage. Receiving performance is not significantly degraded by imperfect matching of the coaxial feedline to the Beverage feed point or by non-optimum termination resistance. You could optimize your matching transformer and termination resistor but the improvement in receiving performance will be very minor. On the other hand, Beverage antenna r eceiving performance can be significantly degraded by: - nearby antennas, power lines and other long conductors, and - common mode signals coupled into the feedline You could optimize your matching transformer to reduce the VSWR to closer to 1:1 on the frequencies you care about most, but you won't notice any improvement in receiving performance. You could optimize your Beverage termination by: - adding extra ground rods and/or short radials to improve ground resistance stability at the connection to termination resistor. - adjusting the termination resistance to minimize the VSWR excursion as you sweep from 1.5 to about 10 MHz 73 Frank W3LPL ----- Original Message ----- From: "Ashraf Chaabane" <[email protected]> To: [email protected] Sent: Wednesday, July 4, 2018 2:13:27 PM Subject: Topband: Beverage Antenna Tuning Hi All I measured the SWR in my beverage antenna; the SWR fluctuates between 1.5 and 3 in a range of 1.8 to 7 MHz. (See: https://drive.google.com/drive/folders/0B9AtNpPfAOUMRDNsaXROMG1VUTg?usp=sharing ) I know SWR should not vary too much. However, some people are suggesting adjusting the termination resistor. Others suggest checking the transformer number of windings for a good match. What shall I do? 73 Ash 3V8SS/KF5EYY _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
