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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Grounds\s*$/: 17 ]

Total 17 documents matching your query.

1. Topband: Grounds (score: 1)
Author: "Mike Greenway" <K4PI@BELLSOUTH.NET>
Date: Sat, 1 Mar 2014 18:44:31 -0500
I am building a new two wire beverage and have built many in the past that seemed to work okay but I am paying close attention to detail on this one. I have a couple of questions to start. Most all a
/archives//html/Topband/2014-03/msg00000.html (6,162 bytes)

2. Re: Topband: Grounds (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Sat, 1 Mar 2014 19:15:22 -0500
ON4UN and others suggest 15 meters I believe. Ive used 25-30' here and it does well with 5 2 wire Beverages with their ends and antenna grounds also spaced from each other by at least 30' and a few a
/archives//html/Topband/2014-03/msg00001.html (8,449 bytes)

3. Re: Topband: Grounds (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 1 Mar 2014 19:04:42 -0600
I don't ground the shields at the transformers. The only place they are grounded/connected together is inside the shack, at the switchbox. My beverage coax is mostly laying on the ground. A little of
/archives//html/Topband/2014-03/msg00002.html (6,916 bytes)

4. Re: Topband: Grounds (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Sat, 1 Mar 2014 21:08:49 -0500
But arent you in the boonies Mike with little common mode noise? I notice a few others with lots of acerage do the same but when I was enroached upon on both sides I just followed ON4UN's lead. It wo
/archives//html/Topband/2014-03/msg00003.html (8,436 bytes)

5. Re: Topband: Grounds (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 1 Mar 2014 21:52:26 -0600
Yes, that's right, Carl. No close neighbors, radio stations, etc. But this house is a prolific generator of RFI, and I have been getting power line noise lately. I'm not saying that there's not a cas
/archives//html/Topband/2014-03/msg00004.html (8,080 bytes)

6. Re: Topband: Grounds (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Sat, 01 Mar 2014 20:12:17 -0800
Of course not. A choke for 160M requires many turns on one or more #31 cores. Study k9yc.com/RFI-Ham.pdf 73, Jim K9YC _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2014-03/msg00005.html (7,974 bytes)

7. Re: Topband: Grounds (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 1 Mar 2014 22:25:30 -0600
Thanks. I have actually studied your document Jim, and have recommended it to many others. :-) I used what I had here. There are several bifilar turns through some of those big #43 beads. I even hung
/archives//html/Topband/2014-03/msg00006.html (8,119 bytes)

8. Re: Topband: Grounds (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Sat, 01 Mar 2014 21:10:38 -0800
I don't have a good handle on RFI from fluorescents, but there are (at least) two mechanisms. One is radiation from the lamps themselves, and that can be reduced by shielding (a screen that makes a g
/archives//html/Topband/2014-03/msg00007.html (8,805 bytes)

9. Re: Topband: Grounds (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 1 Mar 2014 23:13:32 -0600
Didn't know one existed! Where is the RFI reflector? 73, Mike www.w0btu.com _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2014-03/msg00008.html (7,808 bytes)

10. Re: Topband: Grounds (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Sat, 01 Mar 2014 22:26:30 -0800
See below. 73, Jim _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi _________________ Topband Reflector Archives -
/archives//html/Topband/2014-03/msg00009.html (8,238 bytes)

11. Re: Topband: Grounds (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Sun, 2 Mar 2014 08:55:08 -0500
I only have a couple of those lamps and a bit of bypassing in the fixture knocked it down a lot. Since they are seldom on when Im at the radio its tolerable or I shut them off. The one problem I have
/archives//html/Topband/2014-03/msg00010.html (10,375 bytes)

12. Re: Topband: Grounds (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Sun, 2 Mar 2014 09:27:29 -0500
I'm not saying that there's not a case for suppressing common mode as you and others suggest. It all comes down to impedance ratios and signal levels. Any choke or filter is like a pi network or atte
/archives//html/Topband/2014-03/msg00011.html (11,764 bytes)

13. Re: Topband: Grounds (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Mon, 3 Mar 2014 11:56:44 -0600
Thanks for your thoughts. I looked at things here just now, and found that (1) unplugging my amplifier's power cord and (2) disconnecting an unused 50' run of RG-213 from my main TX antenna switch dr
/archives//html/Topband/2014-03/msg00014.html (9,225 bytes)

14. Re: Topband: Grounds (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Mon, 3 Mar 2014 16:26:20 -0500
Hi Mike, I hope we can all collectively rethink RFI suppression a bit. It is electrically impossible for a device to transfer *significant* common mode on 160 meters or other low frequencies without
/archives//html/Topband/2014-03/msg00016.html (11,890 bytes)

15. Topband: Grounds (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 18 Oct 2019 11:36:46 -0400
I wish there some sort of inoculation that hams could get that would allow them to discern the difference between a power line safety ground (required by code) and a lightning ground that is designed
/archives//html/Topband/2019-10/msg00151.html (6,985 bytes)

16. Re: Topband: Grounds (score: 1)
Author: MU 4CX250B <4cx250b@miamioh.edu>
Date: Fri, 18 Oct 2019 09:19:28 -0700
Sent from my iPhone Sorry Roger, but I dont recall reading the accounts you assert the ham reflectors are full of. Seems to me what I mostly read are postings about three types of antenna grounds: (1
/archives//html/Topband/2019-10/msg00153.html (8,251 bytes)

17. Re: Topband: Grounds (score: 1)
Author: Artek Manuals <Manuals@ArtekManuals.com>
Date: Fri, 18 Oct 2019 12:28:29 -0400
And NEITHER of those have thing to do with a RF Ground at a specific frequency  !!!! Dave NR1DX On 10/18/2019 11:36 AM, Roger D Johnson wrote: I wish there some sort of inoculation that hams could ge
/archives//html/Topband/2019-10/msg00155.html (7,926 bytes)

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