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References: [ +from:Peter.Chadwick@gpsemi.com: 62 ]

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21. TopBand: UA1 /FJL (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Thu, 20 Nov 1997 09:35:55 -0000; I haven't seen it reported, but RX1OX/FJL was on 1834 abt 2300 last night - QSL via DL6YET. he was abt 579 with some QSB. I don't know if he is genuine, but if so, that's a nice one for any band. WFW; /archives//html/Topband/1997-11/msg00274.html (6,844 bytes)
22. TopBand: FJL (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Thu, 20 Nov 1997 14:23:12 -0000; Well, guys, there you have it. As Rys says, WFWL, and hope. Good hunting guys. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/topband.html Submissions: topband@contesting.com Administrative; /archives//html/Topband/1997-11/msg00278.html (6,445 bytes)
23. TopBand: Re:ATU's on 160 (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 24 Nov 1997 12:48:24 -0000; I feel that part of the problem is that the commercially available T match network ATU in conjunction with a balun is NOT the way to go about this. I'm just finishing an ATU for this job, and it's si; /archives//html/Topband/1997-11/msg00334.html (7,320 bytes)
24. TopBand: RE:ATUs (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 24 Nov 1997 15:40:58 -0000; There's a magic formula relating Qunloaded to Q loaded that applies. I can't remember it (an engineer needn't remember it, he needs to remember where to look it up!), but if you have a Qu of around 1; /archives//html/Topband/1997-11/msg00342.html (6,769 bytes)
25. TopBand: EU calling (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Thu, 27 Nov 1997 11:39:02 -0000; Further to G3NKC's comments, I was taught back when I got my licence that in a pile up, when the DX came back to someone, everybody else should keep quiet. If the DX came back with a partial call, on; /archives//html/Topband/1997-11/msg00408.html (7,089 bytes)
26. TopBand: Folded unipoles (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 6 Oct 1997 12:46:28 +0100; Lane, KM3G, asked about these some time back - I've been on vacation for two weeks, missing the K7K, which is one of my last 8 wanted countries. Grr! I use a folded unipole on 160, and it works - so; /archives//html/Topband/1997-10/msg00052.html (10,452 bytes)
27. TopBand: RE:Rx amps/noiseless feedback (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 6 Oct 1997 17:13:38 +0100; The Anzac patent on noiseless feedback should have run out by now. I can't find my copy of it, but it's pretty old - back in the 70's. I guess one point to bear in mind is how the amp responds when t; /archives//html/Topband/1997-10/msg00054.html (7,498 bytes)
28. TopBand: RF analyser (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 6 Oct 1997 17:49:16 +0100; to stay The mismatch has more effect on the passband than on the stopband - usually gives horrendous ripples in the passband with increased loss as the mismatch gets worse. However, really mismatchi; /archives//html/Topband/1997-10/msg00057.html (7,210 bytes)
29. TopBand: RE:Rx amps/noiseless feedback (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 6 Oct 1997 18:20:35 +0100; Eric N7CL has a point. It all depends on how much or how little background noise there is. I use a 2 turn loop about 1 metre on a side, with a push pull cathode follower, and get more than enough noi; /archives//html/Topband/1997-10/msg00071.html (7,764 bytes)
30. TopBand: folded unipoles (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 7 Oct 1997 10:17:26 +0100; I disagree with Tom this time. If I have a vertical with a feedpoint resistance of 10 ohms, and one with a feedpoint resistance of 100ohms, the ratio of the currents will be square root 10. An induct; /archives//html/Topband/1997-10/msg00082.html (8,987 bytes)
31. TopBand: loops & preamps (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 7 Oct 1997 17:03:58 +0100; Tom asks Careful balanced construction, with a dual gang capacitor motor driven to tune it. Vertical effects (common mode) are very low, as evidenced by the symmetry of the pattern when I rotate the; /archives//html/Topband/1997-10/msg00091.html (7,726 bytes)
32. TopBand: operating practice (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 8 Oct 1997 09:16:25 +0100; I guess I agree with K7CA - but I'm old fashioned. As Chris says, the ops who identify so rarely make things worse, especially with packet (which I don't have). I guess I've been proud of having my; /archives//html/Topband/1997-10/msg00105.html (8,427 bytes)
33. TopBand: polarisation (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 8 Oct 1997 16:02:15 +0100; went up." I believe that conventional wisdom says VLF signals are generally vertically polarised, as are ground wave signal over conducting ground. A signal coming off the ionosphere isn't travelling; /archives//html/Topband/1997-10/msg00111.html (8,246 bytes)
34. TopBand: Condx am of Oct 8 (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 8 Oct 1997 16:47:22 +0100; I notice nobody raving about condx this morning. I found them poor, with K8ND just coming out of the QSB, and K1ZM the best signal heard. WT3Y wasn't too bad, although I didn't work him. I figured co; /archives//html/Topband/1997-10/msg00112.html (6,946 bytes)
35. TopBand: condx am 9 Oct (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Thu, 9 Oct 1997 09:16:24 +0100; Got up at 0415. Heard DF2PY, DJ2SW, F5IN, SM4DIG, G4DBN all calling CQ DX at some time or another. Tried a few CQ's myself with no joy. No transatlantic stuff at all heard. Gave up and went back to b; /archives//html/Topband/1997-10/msg00132.html (6,829 bytes)
36. TopBand: feedline (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 10 Oct 1997 09:07:19 +0100; One comment I would make is to watch what coax you bury. I guess hardline is probably OK unless you have a very alkaline soil. I've had problems with mil grade UR67 (basically the same as RG213) when; /archives//html/Topband/1997-10/msg00149.html (6,783 bytes)
37. TopBand: Condx 10 Oct am. (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 10 Oct 1997 09:18:59 +0100; Got up a bit later this morning, 0545UTC. G0IVZ, EA6ACC,EI5HE, EA4KD, LA8LA all calling CQ at various times with no takers. I worked Sean, EI5HE - I still need EI confirmed. No joy when I called CQ e; /archives//html/Topband/1997-10/msg00150.html (7,902 bytes)
38. TopBand: Maxwell et al (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 10 Oct 1997 15:18:57 +0100; Tom, you say No argument here. Follow on question, though. I thought (but it's a long time since I did it at college) that Maxwell's equations led to the E and M fields being at 90 degrees, and in ph; /archives//html/Topband/1997-10/msg00156.html (7,611 bytes)
39. TopBand: unun (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 10 Oct 1997 16:26:12 +0100; I'd use an L network - more flexible, and with a reasonable junk box, cheaper. At about 20 odd ohms, the Q will be adequately low. And it can tune out any odd reactance - within limits. 73 Peter G3RZ; /archives//html/Topband/1997-10/msg00160.html (6,606 bytes)
40. TopBand: rfi (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 17 Oct 1997 15:22:10 +0100; Gary, W0AW, A large number of the 49MHz cordless phones have 1.75MHz or therabouts for the base to phone side. This means that any power on 160 is going to leave it a dead duck. I'd go for a 900MHz s; /archives//html/Topband/1997-10/msg00230.html (6,705 bytes)

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