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Total 493 documents matching your query.

321. Re: [RFI] Switchers ... (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 14 Nov 2014 22:36:28 -0500
It's a PDF and a very good one. Just type in a relevant phrase, or word and you'll be there. Start with RFI, or switching power supplies. That's where I'd start, but the whole thing is a good read, f
/archives//html/RFI/2014-11/msg00032.html (8,863 bytes)

322. Re: [RFI] FW: broadband interferes with radio signals (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 08 Jan 2015 11:22:11 -0500
73 Roger (K8RI) -- This email has been checked for viruses by Avast antivirus software. http://www.avast.com _______________________________________________ RFI mailing list RFI@contesting.com http:/
/archives//html/RFI/2015-01/msg00018.html (7,521 bytes)

323. Re: [RFI] FW: broadband interferes with radio signals (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 08 Jan 2015 13:12:39 -0500
In the UK, advancement in the Civil Service (of which the regulatory bodies are a part, of course) is by seniority (and, supposedly, also by competence). In the US, there is a revolving door between
/archives//html/RFI/2015-01/msg00022.html (10,537 bytes)

324. Re: [RFI] FW: broadband interferes with radio signals (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 08 Jan 2015 13:32:36 -0500
I'm well aware of BPL, but most of it has gone away due to poor performance and signal ingress rather than egress. Unfortunately there are "in home" systems, some of which work well and some "under t
/archives//html/RFI/2015-01/msg00024.html (11,108 bytes)

325. Re: [RFI] likely frequency for LED bulbs? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 11 Jan 2015 05:29:02 -0500
A spectrum analyzer is great for this. Most have the sensitivity of a receiver and any noise peaks (in or out of the ham bands) are almost immediately identified Depending on the scope you can view f
/archives//html/RFI/2015-01/msg00038.html (11,515 bytes)

326. Re: [RFI] likely frequency for LED bulbs? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 11 Jan 2015 05:35:31 -0500
So far, I've replaced about 7 CFLs with 60 to 100 watt equivalent LEDs. Two 120 watt floods in the garage. I just took them off the shelf at Lowe's and Ace. There are natural light and warm white. No
/archives//html/RFI/2015-01/msg00039.html (10,176 bytes)

327. Re: [RFI] RF getting into 4-port wirelss router. (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 12 Jan 2015 03:18:06 -0500
Is the neutral connected to ground at the service panel and at the pole? We discovered that the neutral had never been connected at the pole feeding my folks old farm house. 73 Roger (K8RI) I guess t
/archives//html/RFI/2015-01/msg00060.html (10,561 bytes)

328. Re: [RFI] RF getting into 4-port wirelss router. (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 12 Jan 2015 12:42:18 -0500
I have a similar setup, but with 5 computers following an 8 port switch along with various net books, laptops, and smart TVs. there are 3 130' runs of Cat 5 to the shop. 2 active and one spare. The t
/archives//html/RFI/2015-01/msg00076.html (11,411 bytes)

329. Re: [RFI] RFI into modem and GFCI (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 12 Jan 2015 23:28:50 -0500
Here, we use a single GFI wired "through" as the first outlet on each circuit, or a single GFI breaker, so ALL outlets operate as if they are GFIs. That should be acceptable in most areas as another
/archives//html/RFI/2015-01/msg00089.html (11,915 bytes)

330. Re: [RFI] RF getting into 4-port wirelss router. (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 14 Jan 2015 00:34:33 -0500
I know of no one who is an expert on everything. Actually I know a number of knowledgeable people, but no experts. I'll repeat what I said before (as did several others) and ask some questions. The
/archives//html/RFI/2015-01/msg00094.html (16,556 bytes)

331. Re: [RFI] RF getting into 4-port wirelss router. (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 14 Jan 2015 00:46:36 -0500
I guess there's no chance in Hell of it ever working then... Why? It is an inductor with substantial distributed capacitance forming a parallel resonant circuit with a very high impedance at resonanc
/archives//html/RFI/2015-01/msg00095.html (12,266 bytes)

332. Re: [RFI] RF getting into 4-port wirelss router. (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 14 Jan 2015 15:28:18 -0500
Hi Kenith, BTW I'm 74. Lots of meat here and far to much to "line itemize"<:-)) Two thing stand out to me although several more appear to be related. The two things, no, three things that bother me a
/archives//html/RFI/2015-01/msg00098.html (28,790 bytes)

333. Re: [RFI] RF getting into 4-port wirelss router. (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 14 Jan 2015 21:43:00 -0500
On 1/14/2015 7:07 PM, Jim Brown wrote: On Wed,1/14/2015 12:28 PM, Roger (K8RI) wrote: It appears from what you have said that there may be Knob and Tube connected to regular wiring. The biggest probl
/archives//html/RFI/2015-01/msg00100.html (14,209 bytes)

334. Re: [RFI] RF getting into 4-port wireless router - progress (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 15 Jan 2015 11:55:58 -0500
Shows how outdated my knowledge of testers is. <:-)) 73Roger (K8RI) 're making progress. Get one of those little testers for checking outlet wiring. You might find some more strange things going on i
/archives//html/RFI/2015-01/msg00104.html (12,314 bytes)

335. Re: [RFI] w7ekb & ground rods (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 16 Jan 2015 10:38:24 -0500
Power company required 3 ground rods for our service. The ground system for the towers consists of over 600 feet of bare #2 CadWelded to 32, or 33 8' ground rods. That ground system eventually gets b
/archives//html/RFI/2015-01/msg00134.html (11,736 bytes)

336. Re: [RFI] w7ekb & ground rods (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 16 Jan 2015 10:53:41 -0500
Although multiple ground rods need to be bonded together, the typical system has the tower ground and station SPG on opposite sides of the house. Even though bonded the transient rise time can produc
/archives//html/RFI/2015-01/msg00135.html (11,486 bytes)

337. Re: [RFI] w7ekb & ground rods (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 17 Jan 2015 09:10:55 -0500
How things change. When "we" installed an underground service, in our area 3 ground rods were required, but they are in triangle "more-or-less" and only 3 feet apart. This was roughly 10 to 15 years
/archives//html/RFI/2015-01/msg00146.html (13,216 bytes)

338. Re: [RFI] w7ekb & ground rods (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 18 Jan 2015 12:28:58 -0500
It's easier ti hook a hose to the other end and use it like a water drill. No beating, no deforming and it goes in easily and quickly. Stony soil? Then copper pipe can not be driven either. Copper pl
/archives//html/RFI/2015-01/msg00150.html (10,505 bytes)

339. Re: [RFI] Zapped (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 06 Mar 2015 20:15:34 -0500
I've never measured mine. After all, they let me Arc weld, run a plasma torch and use a cell phone. The only restriction is no 900 MHz phones in my shirt pocket, directly over the defib/PM. My dad's
/archives//html/RFI/2015-03/msg00000.html (8,278 bytes)

340. Re: [RFI] LED Tube Lights (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 06 Mar 2015 20:31:55 -0500
I have what I consider a small shop in which I can do computer work, repair my ham radio equipment, plus half of an SO2R set up, Welding (arc and gas), plasma torch, and machine tools. My shop has 22
/archives//html/RFI/2015-03/msg00001.html (9,322 bytes)

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