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81. RE: Topband: diversity rx (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Tue, 01 Jun 2004 02:38:25 +0000
I read the great article on the Hallicrafters DD-1 diversity receiver. Apparently they did not have agc systems fast enough to respond to CW and they had to do some strange stuff to get CW diversity
/archives//html/Topband/2004-06/msg00000.html (7,854 bytes)

82. Re: Topband: Tophat? Does it have to be at the top? (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 10 Jun 2004 14:10:05 +0000
My vertical is 127' of Rohn 25 on a base insulator, with 120 1/4L radials. At the 119' level I have an 80m. dipole attached at the top set of guy wires, with about 400 ft of Phillystran attached to e
/archives//html/Topband/2004-06/msg00036.html (9,777 bytes)

83. Re: Topband: Tophat? Does it have to be at the top? (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 10 Jun 2004 14:19:41 +0000
There are very few hats that 100% stop all current beyond the hat, since it is really an impedance ratio problem and the hat is almost never near zero impedance and the area above the hat almost neve
/archives//html/Topband/2004-06/msg00037.html (9,122 bytes)

84. Topband: Mystery signal on 1805 (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Mon, 28 Jun 2004 02:59:06 +0000
For the last few days I have been hearing an AM broadcast signal on 1805. They seem to be some kind of apocalyptic religious/survivalist station. Have not been able to get an ID thru the QRN and heav
/archives//html/Topband/2004-06/msg00084.html (7,205 bytes)

85. Re: Topband: Mystery signal on 1805 (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Tue, 29 Jun 2004 04:42:45 +0000
and 6890 That what it is. They were strong and clear when they gave their ID tonight. I tuned up to the above frequencies and there they were. No wonder they are so strong here. They are located in M
/archives//html/Topband/2004-06/msg00089.html (7,929 bytes)

86. Topband: PCB Inspection Warning! (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 08 Jul 2004 18:05:28 +0000
I received a telephone call this morning from a lady who told me she was doing a followup to a PCB inspection at the radio station that gave me the Gates BC1-T broadcast transmitter about a year ago.
/archives//html/Topband/2004-07/msg00017.html (10,537 bytes)

87. Re: Topband: two wires Beverage (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Wed, 28 Jul 2004 15:01:20 +0000
I might worry a little about loss when dry also. I'm not sure how this line behaves as a transmission line at radio frequencies. Before WW2 and the advent of coax cable, many hams used "twisted pair"
/archives//html/Topband/2004-07/msg00076.html (9,028 bytes)

88. Topband: AM Broadcast transmitter on CW (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 29 Jul 2004 06:01:33 +0000
After spending much of the summer working on the modifications, I got the Gates BC1-T on the air on CW tonight, about 1820 khz running kw to quarter wave vertical. Worked about 4 stations in a row, w
/archives//html/Topband/2004-07/msg00082.html (7,275 bytes)

89. RE: Topband: Two Wire Beverage Query... (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Fri, 20 Aug 2004 22:54:52 +0000
It seems to me that I've seen some discussion about running a wire on the ground along the length of a beverage to connect the grounds between the feedpoint and the termination...would another run of
/archives//html/Topband/2004-08/msg00027.html (9,115 bytes)

90. Re: Topband: Two Wire Beverage Query... (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Fri, 20 Aug 2004 23:16:55 +0000
Assuming a person overcomes the transformer issues, what about grounds? Tom suggests that grounds are critical and require rods and radials in most cses. We have average soil conductivity here. For m
/archives//html/Topband/2004-08/msg00029.html (9,767 bytes)

91. Topband: Ground rods vs radials (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sat, 21 Aug 2004 15:21:54 +0000
...And I'm not sure I buy into the 'penetrate the soil very far' either. "Very Far" is clearly not a technical term, but the suggestion is that a few inches is all you get. I'm not buying it. ...>Bas
/archives//html/Topband/2004-08/msg00041.html (8,202 bytes)

92. RE: Topband: ARRL Bandwidth petition (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 26 Aug 2004 03:41:06 +0000
The ARRL is soliciting comments on consideration of regulating subbands by bandwidth rather than by mode. It appears that this is to include the HF bands, as indicated below, but there is no mention
/archives//html/Topband/2004-08/msg00090.html (8,298 bytes)

93. RE: Topband: ARRL Bandwidth petition (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Fri, 27 Aug 2004 23:46:49 +0000
"The regulation of emission modes in Amateur Radio Service allocations is a limiting factor with respect to Amateur Radio experimentation," a synopsis of the petition concludes. "It leads to attempts
/archives//html/Topband/2004-08/msg00101.html (10,087 bytes)

94. RE: Topband: TOP HAT GUY WIRES (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Mon, 06 Sep 2004 06:18:06 +0000
... did you take any special precautions in attaching to the mast/tower for good electrical conductivity? I installed lengths of tinned braid under the guy wire clamps, and attached these to the towe
/archives//html/Topband/2004-09/msg00031.html (10,115 bytes)

95. Re: Topband: 1/4 wave vertical (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sat, 11 Sep 2004 16:44:34 +0000
Full-size 1/4 wave with Rohn 25 -- about 11 inches on a face -- is about 128 feet tall. Your tower should be pretty close to that, maybe slightly taller. Common method is to put up 120 feet of tower
/archives//html/Topband/2004-09/msg00064.html (7,782 bytes)

96. Topband: Repairing beverage coax lead-in (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sat, 11 Sep 2004 17:58:56 +0000
As I get ready to extend my beverage back to 900 ft when the crops are in, I notice some damage to the RG6 lead-in that goes from the transformer at the end of the antenna to the receiver in the shac
/archives//html/Topband/2004-09/msg00065.html (8,314 bytes)

97. Topband: Radiolocation gone for good this time? (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Wed, 22 Sep 2004 23:35:29 +0000
I have noticed for several weeks now that there has been no sign of the strang radiolocation beacon that has resided for years in the vicinity of 1950 kHz. Originally it was on approximately 1953.2,
/archives//html/Topband/2004-09/msg00113.html (7,887 bytes)

98. RE: Topband: Tower insulator thickness? (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sun, 03 Oct 2004 01:17:57 +0000
I'm planning on using some insulating material under BPC25 and BPC55 Rohn base plates (and around the pier pin in the center) so the towers may be series-fed on 160. Is 7/16-inch thick enough for thi
/archives//html/Topband/2004-10/msg00008.html (7,306 bytes)

99. Re: Topband: 160 M Band Plan (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Fri, 29 Oct 2004 22:32:28 +0000
During the CW contests (ARRL 160, Stew Perry and CQ 160), it is common to hear CW contacts way up in the SSB part of the band... There is no such thing as the "SSB part of the band." There is the "ph
/archives//html/Topband/2004-10/msg00166.html (7,125 bytes)

100. Re: Topband: Close to earth Beverage. (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sun, 21 Nov 2004 07:00:14 +0000
Sounds logical to me, but that would invalidate any advantage of using sloping vs. vertical terminations. I think Tom W8JI noted earlier that there is actually no advantage at all, and I was just cur
/archives//html/Topband/2004-11/msg00206.html (9,004 bytes)

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