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Total 1348 documents matching your query.

1. Re: Topband: It Isn't Supposed to Work (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sun, 27 Jan 2008 13:25:36 -0500
People tend to assume that because others say something is not a good idea or isn't accurate technically, it means they are saying something "won't work" enough to please someone. Antennas are not t
/archives//html/Topband/2008-01/msg00190.html (8,082 bytes)

2. Re: Topband: Broadcast interfence on a MFJ analyzer (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sun, 27 Jan 2008 13:18:56 -0500
Sometimes if the BC station is nearby it is impossible to get the AM signal out of the antenna analyzer.>> That just isn't accurate. It becomes more difficult, but isn't imposssible. 2. Put a high-pa
/archives//html/Topband/2008-01/msg00189.html (9,391 bytes)

3. Re: Topband: Ant Analyzer Assistance request -- funky readings (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Fri, 25 Jan 2008 22:05:00 -0500
The MFJ filter PARALLEL resonates across the input. Z is thousands of ohms. In parallel with that parallel resonant circuit is a series tuned circuit in the BC band. This has a residual inductive re
/archives//html/Topband/2008-01/msg00185.html (9,332 bytes)

4. Re: Topband: Ant Analyzer Assistance request -- funky readings (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Thu, 24 Jan 2008 12:37:14 -0500
Any comments or constructive criticism from any one on this Analyzer dilemma The 269 analyzer, like the 259, compares voltages across the load, current from the source, and bridge balance to determin
/archives//html/Topband/2008-01/msg00171.html (8,091 bytes)

5. Topband: 160 Meter QRM from WRJS (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sat, 19 Jan 2008 18:59:36 -0500
We have another AM BC station that has been running amuck on 160. I got a positive ID on it tonight. It is WRJS in Swainsboro GA. According to the FCC database (might not be current) they are suppose
/archives//html/Topband/2008-01/msg00153.html (7,110 bytes)

6. Re: [CQ-Contest] Topband: RG-6 connector issues/ rcv array (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sat, 19 Jan 2008 10:02:49 -0500
Very doubtful unless you have the cable firmly anchored at the ends with no slack or stress relief. It is normally from mechanical tension either during or after installation. Been there, had it hap
/archives//html/Topband/2008-01/msg00151.html (8,830 bytes)

7. Re: [CQ-Contest] RG-6 connector issues/ rcv array (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sat, 19 Jan 2008 09:54:35 -0500
Different problem. That was a rigid jacket. He described flexible cables with foil and woven shields, not solid extruded non-ribbed (unlike Heliax, which is ribbed) shields like those that created p
/archives//html/Topband/2008-01/msg00150.html (9,850 bytes)

8. Re: Topband: CABLE MODEMS (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Fri, 18 Jan 2008 15:48:05 -0500
I had problems with a new ADSL installation and 160 meters. The problem is the ADSL system uses carriers up to 1 MHz or higher. So when you filter you can't hurt the level of those carriers or the s
/archives//html/Topband/2008-01/msg00142.html (8,049 bytes)

9. Re: Topband: freq's to avoid (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Fri, 18 Jan 2008 15:39:41 -0500
Good work on the list Jeff and Dennis. I was just looking for something like that myself to post for operators here. One thing puzzles me. Why are some frequencies not multiples of 9 kHz (like say 18
/archives//html/Topband/2008-01/msg00141.html (8,008 bytes)

10. Re: Topband: Filters and grounding (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Tue, 15 Jan 2008 10:04:12 -0500
Since the input of a device is almost always more sensitive to RFI than the output, I'm not convinced his way is correct. But the most important thing is to not have a power line or audio frequency
/archives//html/Topband/2008-01/msg00116.html (10,400 bytes)

11. Re: Topband: Filters and grounding (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Tue, 15 Jan 2008 04:32:04 -0500
Raoul, Gary alluded to BC work. In well-designed BC station studios the audio lines are all balanced shielded lines. The normal procedure, and the proper procedure, is to ground the shield at one end
/archives//html/Topband/2008-01/msg00113.html (12,329 bytes)

12. Re: Topband: Filters and grounding (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Mon, 14 Jan 2008 18:59:42 -0500
Hi Gary, I disagree. It is not a form of "shielding" to ground the filter. If grounding has any effect at all on the system then the shield connections at or between the filter output port and the d
/archives//html/Topband/2008-01/msg00111.html (8,887 bytes)

13. Topband: Filters and grounding (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Mon, 14 Jan 2008 10:52:54 -0500
Perhaps it is worth beating this horse a little. I know there is a popular myth, partially reinforced by improper instructions and articles, that filters need to be "grounded". Filters, if the cabli
/archives//html/Topband/2008-01/msg00106.html (9,215 bytes)

14. Re: Topband: Topband BCB interference reduction (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sun, 13 Jan 2008 20:15:50 -0500
If grounding a filter like that really well helps the performance.........it means your receiver, the filter, or some connection between the receiver and the filter has a bad shield connection. If t
/archives//html/Topband/2008-01/msg00099.html (8,275 bytes)

15. Re: Topband: 160M Daylight QSO's - Conclusion (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sun, 13 Jan 2008 18:07:16 -0500
I'd like to try a west coast station with a decent setup. It was fairly reliable to work K6SE years ago on the days Earl was on. 100 watt stations from the north coast are typically 20-30dB out of no
/archives//html/Topband/2008-01/msg00097.html (7,998 bytes)

16. Re: Topband: Partial Radial System (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sun, 13 Jan 2008 17:57:35 -0500
We never found anything like that in broadcast work. I recall a station that failed to make pattern and the resident engineer decided to cut and remove all the radials in the direction that was too
/archives//html/Topband/2008-01/msg00096.html (8,779 bytes)

17. Re: Topband: Daylight QSO (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sun, 6 Jan 2008 17:10:36 -0500
We shouldn't look just east or west, we should look along the direction of the path. _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contestin
/archives//html/Topband/2008-01/msg00066.html (7,913 bytes)

18. Re: Topband: Boring Report (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Thu, 3 Jan 2008 18:04:59 -0500
Tree, The rumor is actually factual Tree. The gamma feed actually does change what is going on, and a hybrid coupler also is not generally correct for feeding equal currents. It also will not assure
/archives//html/Topband/2008-01/msg00036.html (10,164 bytes)

19. Topband: ADSL 160 meter RFI problems (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Thu, 3 Jan 2008 16:42:51 -0500
I had ADSL installed last month because I was having problems receiving and sending mail via my remote mail host. BellSouth is actually where the problem was at for email. Anyway despite having a ver
/archives//html/Topband/2008-01/msg00034.html (7,255 bytes)

20. Re: Topband: Daylight QSO's during the SP (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Thu, 3 Jan 2008 11:39:13 -0500
Perhaps people should listen and call on 1835 kHz on CW whenever we get a chance during the day?? If I'm around I'll try at 1800Z today. _______________________________________________ Topband mailin
/archives//html/Topband/2008-01/msg00030.html (8,240 bytes)

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