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References: [ +from:k1ttt@arrl.net: 172 ]

Total 172 documents matching your query.

81. Re: [RFI] Stellar Labs 100' Twisted Pair (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Tue, 14 Dec 2010 14:10:15 +0000
It would be better if they had shielded cable. I run shielded twisted pair cable for my tv surround sound system, and just for good measure wrap it around a ferrite core at the receiver end. David Ro
/archives//html/RFI/2010-12/msg00080.html (8,527 bytes)

82. Re: [RFI] Need help identifying RFI (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Tue, 14 Dec 2010 14:16:18 +0000
They can. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net _______________________________________________ RFI mailing
/archives//html/RFI/2010-12/msg00082.html (7,936 bytes)

83. Re: [RFI] Stellar Labs 100' Twisted Pair (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Tue, 14 Dec 2010 17:51:39 +0000
or if running the cables where you don't want to have to do it again you still run shielded twisted pairs. The cable I used did not have foil/drain, it had real braid shield which I brought out sepa
/archives//html/RFI/2010-12/msg00101.html (11,659 bytes)

84. Re: [RFI] ATT Uverse (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Tue, 11 Jan 2011 23:25:30 +0000
What is the problem with uverse? The way I read the docs it looks like fiber optic to either the curb or house directly then a fancy set top box to break out tv, internet, and phone. Do they have pro
/archives//html/RFI/2011-01/msg00098.html (9,241 bytes)

85. Re: [RFI] Which filter to use? (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Mon, 04 Apr 2011 20:01:45 +0000
You must remember that filters can only eliminate what you transmit. Even if the filter works perfectly there are still at least 5 sources of problems that you can not fix with a filter on your stati
/archives//html/RFI/2011-04/msg00005.html (11,558 bytes)

86. Re: [RFI] PV Inverters (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Sat, 09 Apr 2011 11:42:52 +0000
I have the enphase microinverters here on a 5kw system that is right in the middle of the antenna farm. I have had no intereference issues with it at all. I can take a receiver and when the antenna i
/archives//html/RFI/2011-04/msg00017.html (8,492 bytes)

87. Re: [RFI] OT: RE: solar problems (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Mon, 11 Apr 2011 21:10:41 +0000
The pricey high power whole house inverters and battery banks that need maintenance, ventilation, and periodic replacement are the reasons the microinverters are starting to catch on. While they do n
/archives//html/RFI/2011-04/msg00023.html (13,136 bytes)

88. Re: [RFI] New annoying noise just started (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Sun, 07 Aug 2011 17:59:47 +0000
My dog was mesmerized by it, maybe it?s a message from the k9 mother ship. Sounds like a bad lamp ballast to me, what is the bandwidth you hear it over? David Robbins K1TTT e-mail: mailto:k1ttt@arrl.
/archives//html/RFI/2011-08/msg00003.html (8,250 bytes)

89. Re: [RFI] Solar Panels (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Fri, 19 Aug 2011 20:22:10 +0000
Good equipment, installed properly, should be quiet. I have 28 panels in the middle of my antenna farm and can't hear a thing from them. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://
/archives//html/RFI/2011-08/msg00015.html (8,085 bytes)

90. Re: [RFI] SolarWord PV modules, Enphase solar micro inverters and monitor system (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Wed, 05 Oct 2011 10:55:10 +0000
I have 28 of the Enphase inverters model m190-72-240 and they are perfectly quiet. http://wiki.k1ttt.net/2010-Maintenance-and-Upgrade-Blog.ashx#solar http://enlighten.enphaseenergy.com/public/systems
/archives//html/RFI/2011-10/msg00004.html (9,820 bytes)

91. Re: [RFI] SolarWord PV modules, Enphase solar micro inverters and monitor system (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Wed, 05 Oct 2011 12:56:54 +0000
I would be surprised if the panels themselves were the cause of rfi. Its usually the battery charger or inverter(s) that cause problems. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://
/archives//html/RFI/2011-10/msg00006.html (12,891 bytes)

92. Re: [RFI] TV turns on-off when TX (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Sat, 31 Dec 2011 23:47:50 +0000
Not all modern tv's use IR remotes... both of my Samsung LED tv's use both RF and IR. Their supplied control is RF but they can also be controlled by the IR DirecTV control. Neither of them is bother
/archives//html/RFI/2011-12/msg00035.html (13,939 bytes)

93. Re: [RFI] Original message and replying (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Fri, 20 Jan 2012 17:37:39 +0000
Some of us get 60 and more a day and removing the original on them makes us lose track of the thread history... especially if the one you are replying to was sent more than a few minutes ago. please
/archives//html/RFI/2012-01/msg00078.html (8,402 bytes)

94. Re: [RFI] Original message and replying (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Fri, 20 Jan 2012 21:30:09 +0000
Yeah, that is an early one. I have seen a later discussion of that convention vs top posting that explains it in more detail. The bottom post convention grew out of usenet type new servers where anyo
/archives//html/RFI/2012-01/msg00090.html (11,708 bytes)

95. Re: [RFI] New Noise in XU7 Land (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Sun, 29 Jan 2012 12:24:09 +0000
The on-off pattern may not really be on and off, it is possible that it just changes frequency quickly for the 1 second then comes back. If it is close and that loud try hunting with a battery powere
/archives//html/RFI/2012-01/msg00119.html (8,283 bytes)

96. Re: [RFI] Receiver settings for hearing RFI? (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Sun, 11 Mar 2012 11:02:03 +0000
I would use ssb with wide filters, or dsb if your radio has it since that gives double the bandwidth. In AM a stable signal would just sound like quiet air, though that should be noticeable by the la
/archives//html/RFI/2012-03/msg00005.html (8,553 bytes)

97. Re: [RFI] Receiver settings for hearing RFI? (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Sun, 11 Mar 2012 12:50:05 +0000
That is definitely the best way to do it... I have an sdr-iq that I can plug into a laptop to walk around the house with a short whip or sniffer coil to find stuff. Being able to see a whole band is
/archives//html/RFI/2012-03/msg00008.html (9,421 bytes)

98. Re: [RFI] MFJ 75 amp switcher. (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Sun, 11 Mar 2012 14:31:11 +0000
Watch it on the panadapter then unplug the load and see if you can see it sweep up or down in frequency.... its probably somewhere out of the band when unloaded. Also try putting a fan on it when it
/archives//html/RFI/2012-03/msg00016.html (8,267 bytes)

99. Re: [RFI] RFI from HIGH voltage power lines (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Fri, 01 Jun 2012 13:53:56 +0000
The 'beads' or 'bells' as they are usually called on the insulator strings are the key. As a rough guess you can assume 20-25kv line voltage for each glass or ceramic insulator bell in the string. So
/archives//html/RFI/2012-06/msg00002.html (9,061 bytes)

100. Re: [RFI] RFI from HIGH voltage power lines (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Fri, 01 Jun 2012 17:31:17 +0000
There are a wide range of voltages used for dc, see http://en.wikipedia.org/wiki/List_of_HVDC_projects for a good list. The voltage used would depend on distance and how much power they need to trans
/archives//html/RFI/2012-06/msg00009.html (14,706 bytes)


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