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References: [ +from:K8RI@rogerhalstead.com: 493 ]

Total 493 documents matching your query.

281. Re: [RFI] RF tight rooms - somewhat OT (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 12 May 2013 11:35:40 -0400
I know a crystal radio enthusiast in CA that lives near a 50KW BCB radio station. He's been having trouble making Q-meter measurements on some of his hi-Q coils using a HP Q-meter. He's been making e
/archives//html/RFI/2013-05/msg00012.html (10,260 bytes)

282. Re: [RFI] RF tight rooms - somewhat OT (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 12 May 2013 14:48:08 -0400
On 5/12/2013 1:00 PM, Jim Brown wrote: On 5/11/2013 8:34 PM, n0tt1@juno.com wrote: My question to the group is what, in your opinion, is the best/cheapest RF-tight test room he could build for himsel
/archives//html/RFI/2013-05/msg00022.html (11,442 bytes)

283. Re: [RFI] Comments on RFI from Ductless Air Conditioning Units? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 12 May 2013 15:11:37 -0400
On 5/12/2013 1:37 PM, Jeff Stevens wrote: Has anyone had success specifying a term such as 'RFI Free' when dealing with a contractor? Whenever there is AC (or worse yet, square waves) there is going
/archives//html/RFI/2013-05/msg00023.html (12,028 bytes)

284. Re: [RFI] 6M fm iNTERFERENCE (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 20 May 2013 17:07:00 -0400
On 5/20/2013 4:05 PM, kr7o@vhfdx.com wrote: Wireless headset. They started showing up a few years ago in Canada through Amazon and maybe Walmart (?) from what I have read. They are powerful enough to
/archives//html/RFI/2013-05/msg00060.html (9,984 bytes)

285. Re: [RFI] Rogue beer fridge caught by Telstra 'robot' (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Tue, 04 Jun 2013 18:26:23 -0400
On 6/4/2013 2:12 PM, David Robbins wrote: that sounds like a nice idea, but is much harder than it sounds. first, the software would have to know how to sort out the noise from the desired signals. i
/archives//html/RFI/2013-06/msg00014.html (11,799 bytes)

286. Re: [RFI] Rogue beer fridge caught by Telstra 'robot' (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Tue, 04 Jun 2013 23:32:27 -0400
On 6/4/2013 6:26 PM, Roger (K8RI) wrote: On 6/4/2013 2:12 PM, David Robbins wrote: that sounds like a nice idea, but is much harder than it sounds. first, the software would have to know how to sort
/archives//html/RFI/2013-06/msg00015.html (13,413 bytes)

287. Re: [RFI] What the Cellphone Industry Doesn't Want You to Know about Radiation Concerns (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 12 Jun 2013 15:35:21 -0400
Reading what the govt wants to do, may have dire consequences for amateur radio as they are proposing/pushing for a reduction of exposure limits by a factor of 1000. This article deals primarily with
/archives//html/RFI/2013-06/msg00020.html (10,222 bytes)

288. Re: [RFI] What the Cellphone Industry Doesn't Want You to Know about Radiation Concerns (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 12 Jun 2013 20:08:41 -0400
http://depletedcranium.com/devra-davis-refuted/ Thanks for the link. I had a suspicion after reading the article posted here and "the references" 73 Roger (K8RI) Devra Davis _________________________
/archives//html/RFI/2013-06/msg00023.html (9,181 bytes)

289. Re: [RFI] What the Cellphone Industry Doesn't Want You to Know about Radiation Concerns (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 14 Jun 2013 20:12:27 -0400
On 6/14/2013 1:01 PM, Peter Laws wrote: On Fri, Jun 14, 2013 at 11:19 AM, qrv@kd4e.com <qrv@kd4e.com> wrote: Trogladite-Leftists aren't troubled by poor English let alone obvious lies. Gee, I'm a lef
/archives//html/RFI/2013-06/msg00031.html (11,657 bytes)

290. Re: [RFI] What the Cellphone Industry Doesn't Want You to Know about Radiation Concerns (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 15 Jun 2013 07:27:15 -0400
Less RFI and the consumer grade crap we've bought over the years gets overhauled to meet the new spec, thus making listening FUN again????? And you'd need a 2 acre lot (possibly 5) and a 100' tower t
/archives//html/RFI/2013-06/msg00033.html (10,944 bytes)

291. Re: [RFI] RFI Noise - Part II (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 05 Jul 2013 22:52:00 -0400
I did notice while we were going up the stairs to the garage that there were two vents. One looked like an "intake" and the other an "exhaust" which had warm air coming out of it. I did not notice a
/archives//html/RFI/2013-07/msg00009.html (9,302 bytes)

292. Re: [RFI] Keyboard RFI (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 22 Aug 2013 16:00:58 -0400
While the hash noise must truly be bad news, that 50V on the CATV line could be even worse. Is that 50VDC or 50VAC? It sounds as if the cable company has a serious problem extending into the realm of
/archives//html/RFI/2013-08/msg00020.html (8,276 bytes)

293. Re: [RFI] Keyboard RFI (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 22 Aug 2013 23:48:43 -0400
On 8/22/2013 6:30 PM, Jim Brown wrote: On 8/22/2013 2:58 PM, Charlie Gallo wrote: Well, there was some arcing at the ground block in the past, so I lifted the coax to slip on the ferrites, and the vo
/archives//html/RFI/2013-08/msg00027.html (8,963 bytes)

294. Re: [RFI] Found the every few second beep on 80 (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Tue, 10 Sep 2013 16:33:07 -0400
6 turns of LMR400 on 6 2.4" #31 cores works fine. You might need a little silicone grease for that last turn, but I did them dry. Turn diameter is about 5 - 6 inches slightly flattened with no center
/archives//html/RFI/2013-09/msg00023.html (8,991 bytes)

295. Re: [RFI] Samsung Computer Monitor an RFI Dog (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 26 Sep 2013 01:21:21 -0400
Sad to say, that unless you are successful with the application of decoupling and filtering techniques to eliminate the RFI to the TV, your best cure will be to relocate that sloper further away from
/archives//html/RFI/2013-09/msg00068.html (7,483 bytes)

296. Re: [RFI] Samsung Computer Monitor an RFI Dog (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 26 Sep 2013 09:02:17 -0400
The part of the monitors that blow up with RF is the touch controls. That makes sense, in a perverse way -- they work by capacitive coupling, so they are high-Z and thus difficult to bypass. I was co
/archives//html/RFI/2013-09/msg00070.html (8,674 bytes)

297. Re: [RFI] Deja BUZZZ.. vu (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 28 Sep 2013 01:35:42 -0400
Above all, keep your name out of it as much as possible, or you could have some very unsavory critters looking to pay a visit. The police raid the wrong house, shoot an innocent person (happening mo
/archives//html/RFI/2013-09/msg00092.html (8,778 bytes)

298. Re: [RFI] Grouping and routing shack wiring (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 02 Oct 2013 05:23:14 -0400
On 10/2/2013 3:38 AM, Rick Kiessig wrote: A while back, I decided to clean up some wiring in my shack. I grouped some wires together with either twist-ties or a clamp-on toroid, routed them to look n
/archives//html/RFI/2013-10/msg00006.html (8,487 bytes)

299. Re: [RFI] CO2 detectors and RFI (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 23 Oct 2013 23:51:06 -0400
I purchased a Kidde NightHawk CO2 detector model KN-COP-DP-LS, it is designed to plug into a wall outlet plus it has a 9 v. battery backup and LED readout. While transmitting on 80 meters after a whi
/archives//html/RFI/2013-10/msg00023.html (7,869 bytes)

300. Re: [RFI] CO2 detectors and RFI (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 26 Oct 2013 07:47:25 -0400
CO2 is not normally poisonous. Don't mistake suffocating for poison. It replaces the Oxygen in the air. You continue to breathe, but get no oxygen and never notice the difference. It is why I mention
/archives//html/RFI/2013-10/msg00030.html (13,595 bytes)


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