Messages

1

Equipment / Re: Receiving Phased Array with Small Electric or Magnetic Active Wideband Elements

« on: December 23, 2013, 2243 UTC »

I finally moved one vertical antenna along the fence line, they are now 52' apart(ran out of coax).  The null on the local news station stayed about the same, from +10 over S9 to about S2.  The other local station was about +20 over S9 and nulled to about S3 before the move and now after the move with careful nulling it's only S5.  I don't see any other differences after the move so I'm putting the vertical back to its original location.   Dave

2

Equipment / Re: Receiving Phased Array with Small Electric or Magnetic Active Wideband Elements

« on: December 08, 2013, 0258 UTC »

Thank you.

3

Equipment / Re: Receiving Phased Array with Small Electric or Magnetic Active Wideband Elements

« on: December 07, 2013, 0501 UTC »

I didn't plan the location of the antennas it's just that the antenna bases are mounted to chain link fence posts that are about 25' apart.  I was planing on moving one antenna along the fence line another post or two to see if the nulls improve on my day time test stations.  Too cold here to fool around with it now.  Maybe next week.

4

Equipment / Re: Receiving Phased Array with Small Electric or Magnetic Active Wideband Elements

« on: December 07, 2013, 0034 UTC »

Hello Rob,
I just joined the group and your post about phased antennas was one of the first I read.  I now use two 20' verticals fed into a MFJ 1026 phase box for NDB and MW listening.  It works well most of the time after dark but nulling signals during the day is a problem.  I initially tried two amplified loops, same plane and then at 90 degrees to each other but the nulls were never very deep.

The verticals are only about 25' apart at present and when it warms up a little I'll separate them more.  I have to two very strong local stations to use as a daytime standard and when I get the antennas moved apart I'll report back.  Dave