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1. TopBand: Receiver survey (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 3 Mar 1998 12:08:27 -0000; Does anyone have any hard data on the environment for the topband rx? By this I mean the number of signals in cells of amplitude (say 10db cells, from 0dBm to -60dBm and of frequency - say 20KHz cell; /archives//html/Topband/1998-03/msg00026.html (6,978 bytes)
2. TopBand: re-radiation (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 6 Mar 1998 10:45:37 -0000; John, how do you define 'resonance' for this situation? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/topband.html Submissions: topband@contesting.com Administrative requests: topband-REQUE; /archives//html/Topband/1998-03/msg00100.html (6,731 bytes)
3. TopBand: key clicks (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 11 Feb 1998 09:26:21 -0000; The FT102 (certainly in some, if not all serial number series) had terrible key clicks. The official Yaesu mod was not very good at curing: my general observation is that Yaesu rigs appear historical; /archives//html/Topband/1998-02/msg00114.html (6,944 bytes)
4. TopBand: magnet wire enamel (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 11 Feb 1998 09:44:01 -0000; If you're buying magnet wire, get 'self fluxing polyurethane'. That is solderable without any preparation. If you have 'oleo' based insulation ( or Formvar), scraping or burning works. Use an alcohol; /archives//html/Topband/1998-02/msg00115.html (6,767 bytes)
5. TopBand: receivers follow up (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 11 Feb 1998 09:47:03 -0000; Phase noise and IMD go hand in hand. The Phase noise limited Dynamic Range should be equal to the Intermodulation Limited dynamic range. See my paper at the 1986 RF Expo West, repeated by invitation; /archives//html/Topband/1998-02/msg00116.html (6,772 bytes)
6. TopBand: Rcvrs-follow up (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 11 Feb 1998 15:03:01 -0000; method Regrettably, it doesn't exist in electronic form. I'm thinking of updating it for an article for either Communications Quarterley or QEX - regrettably, the technical standard of magazines such; /archives//html/Topband/1998-02/msg00121.html (7,059 bytes)
7. No subject (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 20 Feb 1998 11:27:56 -0000; to my mind, YES!! I agree with CT1BOH, and like him, I don't have packet. I feel that with packet, we get ever closer to de-skilling DXing: the other month, I was after the BV1 on 160. I think he cam; /archives//html/Topband/1998-02/msg00230.html (7,227 bytes)
8. TopBand: 1825 (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 2 Jan 1998 16:28:28 -0000; Does anyone (I guess EU's) know anything about the weak carrier on 1825? It's definitely coming down the antenna, so it isn't my rx! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/topband.ht; /archives//html/Topband/1998-01/msg00021.html (6,716 bytes)
9. TopBand: contest condx (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 1 Dec 1997 10:08:23 -0000; I wasn't on Saturday morning. Sunday seemed pretty dead to me at sunrise - I heard no W/VE or Caribbean. 80, on the other hand was very good, with W and Caribbean being worked as late as 0900. The on; /archives//html/Topband/1997-12/msg00002.html (6,890 bytes)
10. TopBand: ARRL test (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 8 Dec 1997 12:23:22 -0000; I got up early on Sunday, and wasn't impressed by conditions. As G3SED said the, propagation moved around a lot, but I never heard anything west of W9. K5NA was a 'got away'. Nobody really strong. Co; /archives//html/Topband/1997-12/msg00130.html (6,752 bytes)
11. TopBand: Conditions (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 15 Dec 1997 12:09:05 -0000; It seems every time I'm away on business, condx are superb! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/topband.html Submissions: topband@contesting.com Administrative requests: topband-R; /archives//html/Topband/1997-12/msg00193.html (6,682 bytes)
12. TopBand: antennas (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 15 Dec 1997 14:46:34 -0000; antennas >in the next year or so, hopefully a pair of low dipoles at W3LPL for those >times when the high angle signals predominate. I've been surprised at how well my 80 m dipole, fed with open wire; /archives//html/Topband/1997-12/msg00196.html (7,219 bytes)
13. TopBand: condx (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 16 Dec 1997 13:07:34 -0000; In reply to all those wanting to know, I shall be in Geneva at the ITU TG1/5 meeting about out of band and spurious emissions from Jan 4 through 9. (One of my jobs there will be to present a paper on; /archives//html/Topband/1997-12/msg00212.html (6,937 bytes)
14. TopBand: diversity (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 22 Dec 1997 14:34:40 -0000; One of the difficulties is to decide what form of combining should be used. Historically, you tied the audio outputs of the rx's together, and the AGC lines, so that the strongest signal produced eno; /archives//html/Topband/1997-12/msg00268.html (8,346 bytes)
15. TopBand: 23/24 Dec (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 24 Dec 1997 11:07:53 -0000; Interesting condx - very strong US stations coming through as early as 2100 UTC. All better on the loop antenna than on the 80m dipole - a reversal of the last few days. Pile up of Eu's calling the W; /archives//html/Topband/1997-12/msg00290.html (6,749 bytes)
16. TopBand: loops etc (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 3 Nov 1997 15:20:49 -0000; I got the switching properly sorted this weekend - I now have a choice of up to 5 rx antennas, only got 4 at the moment. 1. the vertical used for transmit 2. A tuned loop with 2 turns, about 1 metre; /archives//html/Topband/1997-11/msg00032.html (7,867 bytes)
17. TopBand: Pre amps (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 7 Nov 1997 09:48:09 -0000; Re all the talk about MMICs. I go along with the idea of a 2N5109 - an excellent transistor. But DON'T get the idea that a GaAsFET would be worth trying - the 1/f noise is too high at low frequencies; /archives//html/Topband/1997-11/msg00095.html (6,677 bytes)
18. TopBand: RE: Tower used as vertical (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 17 Nov 1997 08:58:52 -0000; When bypassing control cables, be careful of what capacitors you use. I tried small, cheap 50v dc, 0.1 mFd ceramic discs. They literally caught fire from the 28v AC for the motor of the T2X. \i've go; /archives//html/Topband/1997-11/msg00226.html (6,947 bytes)
19. TopBand: warning msg (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 17 Nov 1997 09:21:32 -0000; Folks, FYI To: <topband@contesting.com> not 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/topband.html Submissions: topband@contesting.com Administrative requests: topband-REQUEST@contestin; /archives//html/Topband/1997-11/msg00227.html (7,211 bytes)
20. TopBand: skewed paths (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 17 Nov 1997 14:14:41 -0000; Questions: Are most DX signals predominantly vertically polarised on arrival, or at least slant polarised by being slowed down at the air-ground interface, or possibly even elliptically polarised? Ar; /archives//html/Topband/1997-11/msg00235.html (6,986 bytes)

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