Mail Archive Search: <+from:herbs@vitelcom.net>

Results:

References: [ +from:herbs@vitelcom.net: 620 ]

Total 620 documents matching your query.

41. Topband: 160 Meter Propagation (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Mon, 08 Jan 2001 12:56:55 -0400; The auroral zone decides everything. When living in Minnesota (W0VXO), using a 100 foot top loaded tower, I heard JA only once. However in 1968 on vacation in Durango, Colorado using a 40 foot invert; /archives//html/Topband/2001-01/msg00095.html (8,724 bytes)
42. Topband: From: herbs@vitelcom.net (Herbert Schoenbohm) (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Fri, 12 Jan 2001 16:01:48 -0400; Ian, It is my experience when changing from 1/4 wave top loaded Marconi to a 3/8 wave inverted L, one looses significant low angle radiation making it more difficult to work DX greater than 3000 mile; /archives//html/Topband/2001-01/msg00137.html (7,002 bytes)
43. Topband: Reverse termination of a single wire Beverage (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Sat, 20 Jan 2001 09:45:43 -0400; The original 1927 Beverage article which I had a copy of before Hurricane Hugo had a drawing of reverse termination of a single wire Beverage by placing the termination resistor in series with the ce; /archives//html/Topband/2001-01/msg00195.html (7,495 bytes)
44. Topband: "T" or Inverted L? (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Sun, 21 Jan 2001 12:45:20 -0400; Marty, Shunt feed and don't even think about the inverted L. The benefits from the top hat not interacting with the beam are worth it alone. A 72 foot tower with a KT-34 are potentially a dream TX an; /archives//html/Topband/2001-01/msg00208.html (8,351 bytes)
45. Topband: 160 meter QTH available for ARRL DX Contest (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Mon, 29 Jan 2001 12:22:37 -0400; My St. Croix Virgin Islands QTH is available for the upcoming ARRL CW (February 17-18) and ARRL Phone (March 3-4). It is a superb 160 meter location on sea level flat land 300 meters from the beach.; /archives//html/Topband/2001-01/msg00257.html (7,411 bytes)
46. Topband: Dual Band Inverted L (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Tue, 19 Dec 2000 09:14:44 -0400; Brian, What you have on 160 is in effect a top loaded 40 foot vertical. Unfortunately the current maximum does not occur at the top of the vertical portion as in the classic T flat top marconi with i; /archives//html/Topband/2000-12/msg00111.html (8,282 bytes)
47. Topband: Re: Posting Results SPDC Dec 30/31 (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Sun, 31 Dec 2000 09:24:51 -0400; Dear Om's I enjoyed the Stew Perry challenge this year even though I did not have any Beverages working. A stray cow took care of that. Additionally my paddle was held together with rubber bands sinc; /archives//html/Topband/2000-12/msg00195.html (7,575 bytes)
48. Topband: DX Contest Location Available (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Thu, 02 Nov 2000 09:33:55 -0400; Here is your chance to work the topband pile ups on the fun side during upcomig contests. My seaside QTH is now available for contesting beginning with the CQ WW CW Contest at the end of the month or; /archives//html/Topband/2000-11/msg00006.html (7,219 bytes)
49. Topband: High Z vs Low Z shunt feed tower (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Sun, 05 Nov 2000 07:39:58 -0400; Ford, The preferred method is to bring the feed impedance as close to 50 ohms as possible and definitely lower the Q of the matching system. A multi wire cage or a shunt of larger diameter such as .7; /archives//html/Topband/2000-11/msg00030.html (8,478 bytes)
50. Topband: Installing Radials (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Tue, 10 Oct 2000 09:48:52 -0300; Faris, The fastest and least labor intensive means of installing radials is by using a vibrating plow blade attachment. They are available from equipment rental companies or on loan from the local ca; /archives//html/Topband/2000-10/msg00062.html (7,590 bytes)
51. Topband: Shunt Fed tower bandwidth replies summary. (score: 1): Author: herbs@vitelcom.net (Herb Schoenbohm); Date: Tue, 05 Sep 2000 11:43:09 -0300; Ken, I found over the years that an increase in the wire size is very beneficial in the BW and also the overall efficiency department.Feeding a grounded tower can present some problems if not enginee; /archives//html/Topband/2000-09/msg00019.html (8,407 bytes)
52. Topband: Hybrid Coupler (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Fri, 08 Sep 2000 10:20:29 -0300; Earl, A good source for high current mica transmitting capacitors is Nebraska Surplus Sales 800-244-4567 or http://www.surplusales.com The have a wide selection of broadcast type G1, G2, or G3 series; /archives//html/Topband/2000-09/msg00034.html (7,903 bytes)
53. Topband: radial system (score: 1): Author: herbs@vitelcom.net (Herb Schoenbohm); Date: Thu, 10 Aug 2000 16:14:01 -0300; Rohn (Peoria, Ill) sells the correct wire for bc stations which is No. 10 copper solid CW10S. The price vary due to market prices at the time of sale. The dealer price is .20 per foot. Your ground sy; /archives//html/Topband/2000-08/msg00028.html (7,414 bytes)
54. Topband: Ground screen advantages (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Fri, 11 Aug 2000 12:14:08 -0300; Several inquires were sent to me on where to obtain "expanded copper mesh" which when used properly is said to reduce E plane losses in the vicinity of a vertical marconi type radiators. S.C.M.C. Inc; /archives//html/Topband/2000-08/msg00038.html (8,616 bytes)
55. Topband: TopBand Receivers (score: 1): Author: herbs@vitelcom.net (Herb Schoenbohm); Date: Wed, 16 Aug 2000 10:32:21 -0300; Barry, The Collins 75A4 with a 500 hz mechanical filter is hard to beat for weak signal reception on 1.8 Mhz even today with all the technology that has come along in the last 50 years since it was d; /archives//html/Topband/2000-08/msg00049.html (9,179 bytes)
56. Topband: Receivers for 160M (score: 1): Author: herbs@vitelcom.net (Herbert Schoenbohm); Date: Sat, 19 Aug 2000 18:43:19 -0300; Jerry, The reason, I believe that made the 75A4, with 500hz Collins mechanical Filters, such a fine 160 meter receiver in its time was the fact that on that band the design used single conversion rat; /archives//html/Topband/2000-08/msg00071.html (7,563 bytes)
57. Topband: TopBand Receivers (score: 1): Author: herbs@vitelcom.net (Herb Schoenbohm); Date: Sat, 14 Aug 1999 11:21:20 -0300; Tom, What about the Collins 75A4? I had Sherwood mods on an early R4C and completely agree with your summary. I believe that a stock A4, for topband, was about the top RX for the money in the 60's an; /archives//html/Topband/1999-08/msg00000.html (6,520 bytes)
58. Re: Topband: Radial Plate (score: 1): Author: Herbert Schoenbohm <herbs@vitelcom.net>; Date: Sat, 23 Aug 2003 19:03:12 -0300; Dick, An easy way out and probably the least expensive is to bend a ring out of some Home Depot 1 inch copper tubing. Bend it in a circle and put a coupling where the two ends come together. You can; /archives//html/Topband/2003-08/msg00125.html (7,711 bytes)
59. Topband: Series Fed vs Shunt Fed Towers (score: 1): Author: Herb Schoenbohm <herbs@vitelcom.net>; Date: Wed, 03 Sep 2003 12:38:50 -0300; Over the past week several interesting comments were made on the advantages of a shunt fed tower over a direct fed insulated tower. I was convinced long ago after listening to the John Mulaney (Mulan; /archives//html/Topband/2003-09/msg00014.html (8,591 bytes)
60. Re: Topband: Topband Beacons - W1AW re:160 Beacons?Resource? (score: 1): Author: Herb Schoenbohm <herbs@vitelcom.net>; Date: Thu, 11 Sep 2003 10:49:29 -0300; John, On St. Croix there is WDHP on 1620 Khz which is licensed to run 1 KW during hours of darkness. They use a 180 foot series feed tower. Please send me an E mail if you hear them. 73 Herb, KV4FZ J; /archives//html/Topband/2003-09/msg00048.html (7,641 bytes)

Current List: 41 - 60
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]