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1. [TowerTalk] Soliciting Yagi comments (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Thu, 12 Jun 1997 09:56:48 -0400; I, for one, would like to see a really "independent" lab test antennas. There has been plenty of "dB-inflation" over the years. In fact, ARRL will still not allow gain or F/B claims in QST ads. It w; /archives//html/Towertalk/1997-06/msg00372.html (8,477 bytes)
2. [TowerTalk] KT34XA cracked insulators (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Tue, 6 May 1997 09:26:38 -0400; Polycarbonate resins, such as GE LEXAN and others, are extremely susceptable to solvents such as WD-40. The GE book lists these chemicals to avoid: Amines, Aromatic Hydrocarbons, strong alkaline dete; /archives//html/Towertalk/1997-05/msg00149.html (7,894 bytes)
3. [TowerTalk] Re: Two towers-7 bands-best config (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Tue, 27 May 1997 13:06:57 -0400; Hygain 204BA Hygain 155BA Hygain 105BA Hygain DB-1217 (dual bander for 12/17 meters) Bill, First of all, what 40 meter antenna will you be using? Some 40 meter loaded beams have a resonance on 17 me; /archives//html/Towertalk/1997-05/msg00617.html (8,624 bytes)
4. [TowerTalk] Hy-Gain 15 meter DE Trap (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Thu, 6 Mar 1997 15:00:26 -0500; Hy-Gain Part Number 878637, 15 meter trap: I removed the cylindrical sheild (outer 1 5/8" tubing), sawed the 7/8" tubing extensions down to 1" long on each end of the coil, and attached pigtail wires; /archives//html/Towertalk/1997-03/msg00081.html (8,016 bytes)
5. [TowerTalk] 205CA vs 204BA (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Thu, 20 Mar 1997 13:50:47 -0500; The 205CA is on a 34 foot boom. W2PV has shown that with this length boom on 20m, usually you can get good gain OR good F/B but not both at the same time. The older 205BA had good gain, approx. 6.9 d; /archives//html/Towertalk/1997-03/msg00296.html (7,380 bytes)
6. [TowerTalk] 205CA Max Gain Setting (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Fri, 21 Mar 1997 14:28:12 -0500; Hy-Gain 205CA, Max Gain Setting: I have attached a YO input file for a Maximum Gain Setting for the 205CA antenna. This design produces 7.3 dBd gain from 14.1-14.3 MHz with F/B better than 20 dB. The; /archives//html/Towertalk/1997-03/msg00336.html (7,872 bytes)
7. [TowerTalk] TH7DX once more (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Mon, 24 Mar 1997 12:04:36 -0500; Carlos, The TH7DX first sold in 1982. The dark aluminum is not a problem on the exposed surfaces, it is likely oxidation. When you take the antenna apart, clean the mating surfaces (inside and outsid; /archives//html/Towertalk/1997-03/msg00447.html (9,771 bytes)
8. [TowerTalk] Square Footage wind load (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Mon, 24 Mar 1997 12:04:45 -0500; Steve, I checked our file on the 204BA. The surface area "should" be 6.8 sq. ft. measured in the "traditional" manner: SQR(Ae^2+Ab^2). This is what YS 1.5 calculates also. The separate areas for the; /archives//html/Towertalk/1997-03/msg00448.html (7,316 bytes)
9. [TowerTalk] Antenna model repository (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Tue, 25 Mar 1997 14:04:49 -0500; Another alternative would be to upload ZIP files of models to one of the Ham antenna FTP sites such as ftp.funet.fi/pub/ham/antenna. I have put 2 of my antenna design programs on this particular site; /archives//html/Towertalk/1997-03/msg00507.html (7,309 bytes)
10. [TowerTalk] Re: TH3 SWR BW (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Thu, 27 Mar 1997 14:52:17 -0500; Lacking the details and time to completely analyze Ed's modifications to the TH3 antenna, I am assuming: 1. That the original 3 elements were placed on a 19 foot boom. (TH5) 2. That a Beta-match was; /archives//html/Towertalk/1997-03/msg00622.html (8,209 bytes)
11. [TowerTalk] Hy-Gain 10 meter trap (score: 1): Author: hygain@compuserve.com (Roger A. Cox WB0DGF); Date: Thu, 27 Feb 1997 15:26:19 -0500; Hy-Gain Part Number 878749, 10 meter trap: I removed the cylindrical sheild (outer 1 5/8" tubing), sawed the 7/8" tubing extensions down to 1" long on each end of the coil, and attached pigtail wires; /archives//html/Towertalk/1997-02/msg00510.html (8,226 bytes)

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