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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[RFI\]\s+Low\s+pass\s+filter\s+opinions\s*$/: 17 ]

Total 17 documents matching your query.

1. [RFI] Low pass filter opinions (score: 1)
Author: "John Geiger" <aa5jg@fidmail.com>
Date: Tue, 11 Jan 2011 17:49:20 -0800
What have list members found to be the best low pass filters to prevent TVI? I currently have a Drake TV-1000 in line but that allows RF up to 52mhz, and actually above that because I have used it su
/archives//html/RFI/2011-01/msg00100.html (6,875 bytes)

2. Re: [RFI] Low pass filter opinions (score: 1)
Author: Jimk8mr@aol.com
Date: Tue, 11 Jan 2011 21:21:47 EST
Do you actually have TVI to over the air TV stations? Since the digital transition in 2009, there are extremely few low VHF TV stations (CH 2-6, 54-88 MHz) on the air. Maybe 25% of the stations are o
/archives//html/RFI/2011-01/msg00101.html (8,033 bytes)

3. Re: [RFI] Low pass filter opinions (score: 1)
Author: "Dale Svetanoff" <svetanoff@earthlink.net>
Date: Tue, 11 Jan 2011 23:19:48 -0600
John, Having read your initial post yesterday (on the 10th), I'd like to make a few comments regarding the situation. First, what is the location of your antenna to either your neighbor's TV set or t
/archives//html/RFI/2011-01/msg00103.html (10,756 bytes)

4. Re: [RFI] Low pass filter opinions (score: 1)
Author: Scott Holisky <sholisky@gmail.com>
Date: Wed, 12 Jan 2011 11:22:37 -0600
Lets not throw out those LPF yet. I live a few miles from the local broadcast towers here in the Twin Cities. The ERP from the three towers is ~30 Megawatts, give or take. In the days of analog TV y
/archives//html/RFI/2011-01/msg00106.html (7,077 bytes)

5. Re: [RFI] Low pass filter opinions (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Wed, 12 Jan 2011 11:27:50 -0800
I was similarly located in Chicago for nearly 20 years. For a research project on RFI to audio systems, I did both calculations and measurements (HP Spectrum Analyzer). At close in distances, field s
/archives//html/RFI/2011-01/msg00107.html (10,797 bytes)

6. Re: [RFI] Low pass filter opinions (score: 1)
Author: "Eduardo Somoano C" <co8ly@frcscu.ciges.inf.cu>
Date: Wed, 12 Jan 2011 20:10:20 -0500
Dear John : Although my situation is different because my TV is not for cable, I think that it is impossible to eliminate ITV in the channel 2. I built several LPF and use the Drake TV-1000, everythi
/archives//html/RFI/2011-01/msg00109.html (8,656 bytes)

7. Re: [RFI] Low pass filter opinions (score: 1)
Author: dalej <dj2001x@comcast.net>
Date: Wed, 12 Jan 2011 16:49:30 -0600
How would I cure a pin one problem in a particular piece of equipment. Would I look at the input XLR or TRS and put that pin one directly to ground or the chassis somewhere close to the receptacle? W
/archives//html/RFI/2011-01/msg00112.html (12,134 bytes)

8. Re: [RFI] Low pass filter opinions (score: 1)
Author: "Dale Svetanoff" <svetanoff@earthlink.net>
Date: Wed, 12 Jan 2011 22:26:48 -0600
Dale, You have touched upon one of the key issues with respect to curing RFI problems in most consumer and commercial equipment. One of the key tenants in minimizing and controlling RFI into or out o
/archives//html/RFI/2011-01/msg00113.html (15,626 bytes)

9. Re: [RFI] Low pass filter opinions (score: 1)
Author: dalej <dj2001x@comcast.net>
Date: Thu, 13 Jan 2011 05:43:38 -0600
Hello Dale, Thanks for that info. I have a Behringer MX882 used in a splitter configuration so that I can feed three rigs with one microphone. Anyway this morning I used my Fluke 77 and checked the i
/archives//html/RFI/2011-01/msg00115.html (17,580 bytes)

10. Re: [RFI] Low pass filter opinions (score: 1)
Author: "John Geiger" <aa5jg@fidmail.com>
Date: Thu, 13 Jan 2011 06:01:45 -0800
What am I to make of the reviews on eham.net of people who had RFI, then bought a TVI filter and that cleared it up? You can find quite a few like these in the product reviews section for RFI. Not tr
/archives//html/RFI/2011-01/msg00116.html (18,292 bytes)

11. Re: [RFI] Low pass filter opinions (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Thu, 13 Jan 2011 11:06:29 -0800
Look at the dates of those reviews. The conditions I've outlined have changed over the years, with the transition first from TV sets connected to antennas, to TV sets connected to cable TV systems (C
/archives//html/RFI/2011-01/msg00117.html (10,245 bytes)

12. Re: [RFI] Low pass filter opinions (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Thu, 13 Jan 2011 11:39:56 -0800
In pro audio (including broadcasting, news gathering, sound reinforcement, concert sound, and studio work, there are VERY important reasons why cable shields must NEVER have a DC connection to the sh
/archives//html/RFI/2011-01/msg00118.html (9,911 bytes)

13. Re: [RFI] Low pass filter opinions (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Thu, 13 Jan 2011 13:12:56 -0800
That's right. Pin 1 problems take many forms. One is at the point where the antenna (or CATV coax) comes into the TV set or cable box. Another is a poor shield connection anywhere in that path.. Thes
/archives//html/RFI/2011-01/msg00120.html (12,186 bytes)

14. Re: [RFI] Low pass filter opinions (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Thu, 13 Jan 2011 13:56:58 -0800
Unfortunately that tells you nothing. I'd bet a six pack of some really good Belgian ale that the Behringer has pin 1 problems. You can't measure this with an ohmmeter (because the resistance of a ci
/archives//html/RFI/2011-01/msg00125.html (10,129 bytes)

15. Re: [RFI] Low pass filter opinions (score: 1)
Author: dalej <dj2001x@comcast.net>
Date: Thu, 13 Jan 2011 17:08:53 -0600
I won't bet, but yes, I did actually take the cover off of this Behringer box and what I found was like you said, a long PCB with the XLR and TRS receptacles mounted on a long PCB. Pin 1 on each conn
/archives//html/RFI/2011-01/msg00128.html (11,789 bytes)

16. Re: [RFI] Low pass filter opinions (score: 1)
Author: "Dale Svetanoff" <svetanoff@earthlink.net>
Date: Thu, 13 Jan 2011 18:37:06 -0600
John, Jim Brown, K9YC, answered your first question very well. Again, I repeat, using a LPF in your situation will NOT help the RFI problem. The filters within the rig (assuming a modern solid state
/archives//html/RFI/2011-01/msg00129.html (21,724 bytes)

17. Re: [RFI] Low pass filter opinions (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Thu, 13 Jan 2011 19:17:37 -0800
NO! Go back and study what I've written in earlier posts over the last few days. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesti
/archives//html/RFI/2011-01/msg00132.html (9,530 bytes)

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