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161. Re: Topband: FT8 - How it really works (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 20 Dec 2018 12:57:40 -0500
That is only true if you leave AGC enabled and the strong signals result in the AGC decreasing the overall sensitivity. The WSJT-X Users Guide (instructions) recommend turning off AGC. It is possible
/archives//html/Topband/2018-12/msg00204.html (12,883 bytes)

162. Re: Topband: Inverted L improvements - Part 3 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 16 Jan 2019 20:07:15 -0500
Theoretical impedance for a full height 1/4 wave vertical is 32 Ohms. An inverted L (also "T" or other top loaded antenna) will be less depending on the height of the vertical section and how much t
/archives//html/Topband/2019-01/msg00045.html (13,174 bytes)

163. Re: Topband: 4sq vs SAL 30 Mkii in a forest (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 18 Feb 2019 19:44:25 -0500
I would recommend looking into the YCCC "9 circle" (or "5 square") array. Even though the kits are no longer available boards appear to be available from the PI4CC group. The vertical arrays are les
/archives//html/Topband/2019-02/msg00187.html (9,279 bytes)

164. Re: Topband: 4 Square Receiving at 3V8SF (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 2 Mar 2019 09:06:14 -0500
Ash, at less than 1 wavelength the TX antenna is still within the near field and can most certainly impact the receiving array. The real questions are how much does it impact the shortened verticals
/archives//html/Topband/2019-03/msg00007.html (9,702 bytes)

165. Re: Topband: Transmit antenna de-tuning relay. (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 23 Mar 2019 16:14:13 -0400
On 2019-03-23 1:57 PM, Herbert Schoenbohm wrote: My tower is a Rohn 45 90 footer and there must be some way of detuning it via the skirt adjustment means to make it non-resonant at 1825 kHz This is s
/archives//html/Topband/2019-03/msg00104.html (9,820 bytes)

166. Re: Topband: Topband Digest, Vol 197, Issue 25 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 28 May 2019 20:23:45 -0400
According to the list as published in K1ZM's book "DXing on the Edge - The Thrill of 160 Meters" (c) 1997, the first five 160 DXCCs are: 1) W1BB 2) W1HT 3) W8LRL 4) KV4FZ 5) K1PBW Due to a clerical e
/archives//html/Topband/2019-05/msg00099.html (7,846 bytes)

167. Re: Topband: #1 W1BB (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 29 May 2019 14:42:52 -0400
There was no reply and to this day, nearly 50 years later they have never allowed such an award. To the contrary - ARRL offer endorsement plates for 160, 30, 17, 12 and 6 meters that can be attached
/archives//html/Topband/2019-05/msg00105.html (8,469 bytes)

168. Re: Topband: Ticks (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 16 Jul 2019 15:18:23 -0400
You may not see a deer tick. They are much smaller than the more common dog tick - the deer tick is about the size of the period at the end of a printed sentence. Unfortunately, we have both even dow
/archives//html/Topband/2019-07/msg00031.html (10,391 bytes)

169. Re: Topband: 160 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 2 Aug 2019 20:29:53 -0400
Absolutely not! All modes used for DXCC have more skills in common than they have differences. There is more difference between CW and SSB than there is among RTTY, PSKxx, FTx - yet all count for DXC
/archives//html/Topband/2019-08/msg00094.html (15,041 bytes)

170. Re: Topband: FYI Robot contacts "outlawed" by ARRL (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 21 Aug 2019 14:32:43 -0400
On 2019-08-21 2:22 PM, Ed Sawyer wrote: So I don't see anything preventing someone from seeing and clicking on half a dozen calls before bedtime and waking up with all or many of them worked. No to p
/archives//html/Topband/2019-08/msg00241.html (10,000 bytes)

171. Re: Topband: Shunt feed question (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 16 Oct 2019 16:46:12 -0400
Because the *shunt* capacitor creates an L network with the impedance (R +/- jX) at the bottom of the gamma arm. Mathematically you are doing a series to parallel conversion. For normal gamma operati
/archives//html/Topband/2019-10/msg00133.html (10,930 bytes)

172. Re: Topband: FT8 clutter on the DX Cluster (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 13 May 2020 11:48:52 -0400
The solution is to switch to DXLab Suite (DXKeeper for logging, and SpotCollector for cluster/spotting). SpotCollector allows the operator to block spots based on digital mode - e.g., one can block J
/archives//html/Topband/2020-05/msg00063.html (8,852 bytes)

173. Re: Topband: ground loop (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 15 Jan 2021 15:44:52 -0500
Article is more properly titled "improper bonding." 73, ... Joe, W4TV _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
/archives//html/Topband/2021-01/msg00154.html (7,785 bytes)

174. Re: Topband: The Magic-T (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 10 Feb 2021 17:49:59 -0500
A loss of 3 dB may be like "to be or not to be" of a QSO on 160 meters. That is extremely unlikely. The limiting factor on 160 meters is signal to noise ratio, not absolute signal levels. Most amate
/archives//html/Topband/2021-02/msg00064.html (9,012 bytes)

175. Re: Topband: CQ Zones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 9 Mar 2021 10:27:04 -0500
Oh PLEASE! You sound just like AM phone operators when SSB came along. And spark operators when CW started to replace it. The first DX was nothing more than single letters ... 73, ... Joe, W4TV I can
/archives//html/Topband/2021-03/msg00036.html (9,308 bytes)

176. Re: Topband: CQ Zones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 9 Mar 2021 14:16:50 -0500
In the JT modes with weak signals the program copies a portion of the call and completes the call by comparing the partial call to a call sign data base. *THAT IS NOT TRUE* you need to study Joe Tay
/archives//html/Topband/2021-03/msg00052.html (10,791 bytes)

177. Re: Topband: CQ Zones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 9 Mar 2021 17:18:54 -0500
And there he just blew up his own argument. The "machine" (computer) actually copies the callsign(s) in an FT4/FT8/JT9/JT65/FST4 QSO just as it does with RTTY (MMTTY or 2Tone) or PSK##, Olivia, MFSK#
/archives//html/Topband/2021-03/msg00062.html (10,276 bytes)

178. Re: Topband: 160 meter 1/8 wave (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 1 Apr 2021 16:14:20 -0400
Are the vertical sections of both antennas the same? What size hat? What length is the "L"? Does either antenna have coil loading and, if so, where is the coil located and what is its "Q"? The top lo
/archives//html/Topband/2021-04/msg00003.html (7,608 bytes)

179. Re: Topband: Great Engineering by AA7JV (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 5 Apr 2021 15:39:13 -0400
It's no different that the current system of "rent-a-remote" that allows the well healed to chase propagation. As long as the person/group "placing the boxes" has the necessary licenses and landing
/archives//html/Topband/2021-04/msg00030.html (9,495 bytes)

180. Re: Topband: 43 80 Meter Vertical (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 11 Apr 2021 08:36:00 -0400
So we do need a lot of space for this. That is for 160 meters. Bob is building for 80 meters (3545 KHz) so use the info here: <https://www.dj0ip.de/vertical-antennas/80m-on-12m-pole/> 73, ... Joe, W
/archives//html/Topband/2021-04/msg00064.html (11,702 bytes)

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