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## Re: [TowerTalk] Perplexing Antenna Problem

 To: , Re: [TowerTalk] Perplexing Antenna Problem "Bernard(wtrone)" Sat, 28 Aug 2004 20:38:20 -0500
 ``` John: The tower is folded over. The antenna is almost vertical and the measurements are made in the 180 degree mode. If I tune in on a strong signal, say on 20M, and then do a calibrate, you can see the signal strength go almost to zero and then build back up. 73, Bernard, WA4OEJ ----- Original Message ----- From: To: Sent: Saturday, August 28, 2004 6:58 PM Subject: Re: [TowerTalk] Perplexing Antenna Problem > The problem appears to be in the antenna. Are the received signals strong > and does it appear to have a proper beam pattern when you rotate it? > > John > (callsign) KK9A > > ----- Original Message ----- > From: "Bernard(wtrone)" > To: > Sent: Saturday, August 28, 2004 19:40 > Subject: [TowerTalk] Perplexing Antenna Problem > > > I posted the following message on the Yahoo SteppIR board and thought > that I might also get some ideas on this board. > > > I have an interesting problem for all of you antenna experts out there. If > you have been reading this thread (Yahoo SteppIR board), you know that I > have been having problems with my new SteppIR 3 element beam. I was able to > borrow a MFJ-259B this morning and made a relatively extensive set of > measurement, which taken as a whole, just do not make sense. > > In summary (2 measurements on 20, 1 on 17, 2 on 15, 1 on 12 and 2 on > 10M for each series of readings): > > 1. Set of measurements using the MFJ with a 20" length of coax > to the SteppIR. Measured from 20-10M SWRs of from 1.5:1 to 1:1 (also have > the R and X measurements but won't go into those just yet). > > 2. Set of measurements using the MFJ in the shack using the full > length of cable to the SteppIR. Measured from 20-10M SWRs of from 1.4:1 to > 1:1. > > 3. Using MFJ to measure Coax Loss from 20-10M showed 1.3 to 1.6 > dB. Probably about 135 ft of cable. > > 4. Put the cable in the shack directly on the antenna connector > of a Daiwa NS-660PA SWR and Power Meter, and the SWR is 5:1 from 20-10M. > The reading on the TenTec Orion is high VSWR. Take the PL-259 off the > SteppIR and put it on a 50 ohm dummy load and the SWR is a flat 1:1 across > 20-10M both on the Daiwa and Orion. > > 5. Tried varying the "tune" power of the Orion from about 1 watt > to 50 watts. No difference. > > 6. Tried taking the Daiwa out of the circuit. No difference. > Orion still reads high VSWR. > > 7. Swapped out a complete set of coax cables to insure nothing > was common. No difference. > > Anyone out there in radio land have any ideas? I am going to talk to > Jim on Monday, but this is really a STRANGE set of data. I am a bit > perplexed with what I am seeing! > > 73, > > > > Bernard, WA4OEJ > _______________________________________________ > > See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless > Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any > questions and ask for Sherman, W2FLA. > > _______________________________________________ > TowerTalk mailing list > TowerTalk@contesting.com > http://lists.contesting.com/mailman/listinfo/towertalk > > > > _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
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