Topband: Cutting Delay Lines
I'm cutting a 40 degree and a 20 Degree Delay line using RG6 at 1.83MHz for a receive 8 circle array ! I know the velocity factor of the RG6 and have all the math worked out . After doing the calculations and trimming the RG6 back , I'm looking for X=0 at 4.118 MHZ ( or as close to X=0 as possible ) Now to my question: I'm finding the X=0 to be a broad range , looks to be + - 50 KHz on my MFJ 259b .. I know , I need a better analyzer ... Can I double of quadruple the frequency to narrow the span where X=0? Thanks Ed N5DG --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: 160 Meter Radio Propagation Prediction Table
Years ago, some of the 80 meter Dxers used to monitor a commercial JA broadcast frequency. It was a good indicator of Japanese propagation. Anyone done this on 160 meters?. if yes, what frequency, call sign ? Bruce-K1FZ http://www.qsl.net/k1fz/beverage_antenna.html .I know, I KNOW . top band propagation predictors are about useless BUT, Hey..anything is worth a looksee.doncha know?!?! You see this in the write up below the "dashboard" (url at the bottom of this post) "A GREEN box means that propagation on the specific path might be possible..." 71.5/72 de Jim Rodenkirch K9JWV _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: 160 Meter Radio Propagation Prediction Table
..I know, I KNOW . top band propagation predictors are about useless BUT, Hey..anything is worth a looksee.doncha know?!?! You see this in the write up below the "dashboard" (url at the bottom of this post) "A GREEN box means that propagation on the specific path might be possible..." We all know anything is possible..it's when some numerical probability is assigned we know some true "measuring" was performed AND we know measuring and predicting propagation on top band can approach whimsical BUTconsider this a "tool," of sortsI see where the page is updated every five minutes. 71.5/72 de Jim Rodenkirch K9JWV P.S. Enjoy the days ahead!! http://www.spacew.com/www/160pred.html _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Top Band propagation predictor..............
...I know, I KNOW . top band propagation predictors are about useless BUT, Hey..anything is worth a looksee.doncha know?!?! You see this in the write up below the "dashboard" "A GREEN box means that propagation on the specific path might be possible..." We all know anything is possible..it's when some numerical probability is assigned we know some true "measuring" was performed AND we know measuring and predicting propagation on top band can approach whimsical BUTconsider this a "tool," of sortsI see where the page is updated every five minutes. 71.5/72 de Jim Rodenkirch K9JWV P.S. Enjoy the days ahead!! _ Topband Reflector Archives - http://www.contesting.com/_topband
