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References: [ +from:k8ri@rogerhalstead.com: 493 ]

Total 493 documents matching your query.

61. Re: [RFI] Is a Ground-Shortening Switch Better? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 12 Mar 2009 23:21:31 -0400
Mount it on the bulkhead grounding plate and run a phenolic rod through the wall with a handle allowing the short ground path, yet the convenience and safety of the inside actuation. I have too many
/archives//html/RFI/2009-03/msg00032.html (8,262 bytes)

62. Re: [RFI] QTH.COM Ad -- Need Help: ham antennas a... (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 14 Mar 2009 21:35:37 -0400
Cable leakage is easily identified by listening on 145.25 which I believe is the audio subcarrier for channel 18. What it'll sound like after they go digital? I don't know. One thing I do know. If th
/archives//html/RFI/2009-03/msg00059.html (11,020 bytes)

63. Re: [RFI] update <was> 40m (and other) noise (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 11 Apr 2009 20:46:51 -0400
MOVs are the equivalent of a clipping diode and protect from spikes. They do little if anything for filter out noise and I've never head of them being used for that purpose. They are often used to pr
/archives//html/RFI/2009-04/msg00029.html (12,021 bytes)

64. Re: [RFI] Coaxial Choke (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 15 Apr 2009 19:17:19 -0400
Having been a project manager, I found one of the main problems is many engineers have tunnel vision even without the specialization with in their fields. It's a fine line that divides focus and tun
/archives//html/RFI/2009-04/msg00053.html (8,332 bytes)

65. Re: [RFI] where to buy FairRite? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 27 Apr 2009 19:56:27 -0400
I don't know about you, but I want a lot of head room when running a KW when I get near the band edges. I've blown out more than one balun albeit, never a choke balun. <:-)) 73 Roger (K8RI) _________
/archives//html/RFI/2009-04/msg00073.html (9,593 bytes)

66. Re: [RFI] Alarm Systems and EMI/EMC (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 10 May 2009 00:54:10 -0400
I would think that most in the VHF - UHF range would be easily overloaded and blocked. They may not decode due to being blocked, but one being next door to a 440 system might be down most of the time
/archives//html/RFI/2009-05/msg00014.html (12,439 bytes)

67. Re: [RFI] Fwd: Alarm Systems and EMI/EMC (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 10 May 2009 14:25:07 -0400
So a simple carrier at the wrong time could/would put the enter system out of commission for up to an hour? My take on a lot of these systems is they could easily be overloaded/blocked with medium to
/archives//html/RFI/2009-05/msg00025.html (8,894 bytes)

68. Re: [RFI] CATV Leakage? Horizonal Osc Harmonics (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 11 May 2009 13:36:47 -0400
On that is very common is some one with cable and an outside antenna not wanting to bother with an A/B switch. They just wire the to cables together at the TV, or sometimes use a combiner. This invar
/archives//html/RFI/2009-05/msg00031.html (9,888 bytes)

69. Re: [RFI] Mast-mount TV Pre-Amp -- Avoiding RFI & Overload? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 04 Jun 2009 00:21:32 -0400
There is a thin band, or very narrow range where the signal breaks up, pixelizes, pauses, or goes out of sync between the audio and video, but it is so narrow it is seldom seen. When the signal reach
/archives//html/RFI/2009-06/msg00005.html (9,901 bytes)

70. Re: [RFI] Mast-mount TV Pre-Amp -- Avoiding RFI & Overload? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 04 Jun 2009 03:10:48 -0400
BTW I've been using cheap old Radio Shack remote amps, but they were running $50 plus. I use those as they only last a couple of years with all the lightning around here. 73 Roger (K8RI) ____________
/archives//html/RFI/2009-06/msg00006.html (11,250 bytes)

71. Re: [RFI] Mast-mount TV Pre-Amp -- Avoiding RFI & Overload? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 04 Jun 2009 22:37:06 -0400
I've been following this thread for a while plus one contribution...so... When you say "out int he woods", are the stations close (strong signals), far, (weak signals) or a mix? Are they all (more or
/archives//html/RFI/2009-06/msg00011.html (11,124 bytes)

72. Re: [RFI] Mast-mount TV Pre-Amp -- Avoiding RFI & Overload? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 05 Jun 2009 00:13:22 -0400
As I mentioned in the other post, I run a KW up through 144 into the array and up to 160 watts on 144 simplex on the Diamond, side mounted vertical. Normal power is 2.5 to 5W for the repeaters http:/
/archives//html/RFI/2009-06/msg00014.html (13,106 bytes)

73. Re: [RFI] Latest RFI-proof SUVs (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 10 Jun 2009 17:04:58 -0400
I've been driving a 99 4-Runner since 2002 (After a GMC Gimmy pulled out in front of my TA on the highway. Put the right front wheel back to the seat and all the antennas pointed straight forward) I'
/archives//html/RFI/2009-06/msg00018.html (8,565 bytes)

74. Re: [RFI] Latest RFI-proof SUVs (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 10 Jun 2009 18:01:26 -0400
I asked about the rig at the dealers and they installed it for me at no extra charge. In the 4-Runner the rig is under the driver's seat with the wiring under the edge of the carpet and through the f
/archives//html/RFI/2009-06/msg00021.html (11,452 bytes)

75. Re: [RFI] Latest RFI-proof SUVs (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 10 Jun 2009 22:37:00 -0400
I wonder if that was common to the new model or just that particular unit? 73 Roger (K8RI) _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.
/archives//html/RFI/2009-06/msg00023.html (14,370 bytes)

76. Re: [RFI] Big Farad versus Hybrid Caps? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 18 Jun 2009 21:00:03 -0400
I don't believe there is a more effective capacitor made than that big automobile battery. 73 Roger (K8RI) _______________________________________________ RFI mailing list RFI@contesting.com http://l
/archives//html/RFI/2009-06/msg00041.html (8,781 bytes)

77. Re: [RFI] Looking for ideas about yet another noise source (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 12 Jul 2009 20:47:09 -0400
How about building up one of those "doppler shift" antennas? I've seen them used on 2-meters and for close in work I'd think it could be adapted to 20. For years I've chased what at times can be an o
/archives//html/RFI/2009-07/msg00006.html (13,877 bytes)

78. Re: [RFI] Looking for ideas about yet another noise source (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 13 Jul 2009 21:34:46 -0400
I've never seen the circuitry, but how did the old ADF equipment work? Might it be adaptable with a computer and display to display and overlay on a GPS moving map? 73 Roger (K8RI) __________________
/archives//html/RFI/2009-07/msg00009.html (17,229 bytes)

79. Re: [RFI] Looking for ideas about yet another noise source (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Tue, 14 Jul 2009 18:02:22 -0400
I'm referring to ADF, the old set of VHF, vertically polarized dipoles on a pole that you'd see at most major airports. No loop was involved. When you keyed your radio the ADF display would show a li
/archives//html/RFI/2009-07/msg00011.html (22,289 bytes)

80. Re: [RFI] ATT U-Verse RFI issues??? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 20 Jul 2009 20:45:19 -0400
Here's what a friend near the Detroit area told me about ATT's Uverse a while back: "It's a long story, but after AT&T techs threw in the towel on my rig scrambling the brains of the residential gate
/archives//html/RFI/2009-07/msg00017.html (9,476 bytes)


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