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

Total 493 documents matching your query.

381. Re: [RFI] RF quiet HVAC (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 2 Dec 2015 14:10:02 -0500
What about heat pumps that use ground water which 5 feet deep and down runs around 50-55F Up here they either put down, 4 to 6 50' wells (give or take), or plant a large pipe network depending on the
/archives//html/RFI/2015-12/msg00030.html (9,576 bytes)

382. [RFI] Thanks (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 7 Dec 2015 22:29:41 -0500
Thanks for all the input on the good and bad major appliances. Now I can proceed with a little more confidence, but remaining wary 73 Roger (K8RI) -- This email has been checked for viruses by Avast
/archives//html/RFI/2015-12/msg00061.html (6,380 bytes)

383. [RFI] One Voice Can Make a Difference! (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 9 Dec 2015 03:32:47 -0500
I posted a similar note to Tower Talk. Please do not cross post any answers. A while back I found that our township was rewriting their zoning. I found that they planned on addressing towers as a sin
/archives//html/RFI/2015-12/msg00064.html (8,969 bytes)

384. Re: [RFI] ARRL Again Complains to FCC about Illegal Marketing of Electronic Lighting Ballasts (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sun, 3 Jan 2016 02:35:50 -0500
As a data point and FYI as this is only one installation: I have 6 of the 2 tube, 4 footers in the basement, O have 11 0f the commercial 2 tube, 8 footers in my shop. We have 22 60 and 75W LEDs on th
/archives//html/RFI/2016-01/msg00001.html (15,169 bytes)

385. Re: [RFI] Finding house noise sources (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Tue, 19 Jan 2016 01:19:08 -0500
Others have mentioned a doorbell transformer. I you are not the original owner and use a battery operated doorbell (like we do), there may be an unused doorbell transformer (or other unused things li
/archives//html/RFI/2016-01/msg00017.html (8,122 bytes)

386. [RFI] Typical circuit paths (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 20 Jan 2016 07:29:26 -0500
Often, a circuit well feed the lights in one room and the outlets in the next. Usually outlets have two Romex (B,W, Bare) wire bundles coming in. One is the power coming in ant the other goes back up
/archives//html/RFI/2016-01/msg00040.html (7,859 bytes)

387. Re: [RFI] can a tower re-radiate RFI? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 22 Jan 2016 02:23:09 -0500
When I had the local repeater in my garage about 25 years ago, it was desensing when it would transmit. The 6 cans were set up with a spectrum analyzer I don't remember the signal generator, but ther
/archives//html/RFI/2016-01/msg00051.html (9,156 bytes)

388. Re: [RFI] can a tower re-radiate RFI? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Fri, 22 Jan 2016 03:15:18 -0500
I take it, that this is a broad band noise. Does it cover 160 and all the way to 80, or just the two bands? Does it cover the entire band(s) with the same strength? How about the broadcast band? Stro
/archives//html/RFI/2016-01/msg00052.html (9,512 bytes)

389. Re: [RFI] Finding house noise sources (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 3 Feb 2016 20:46:59 -0500
Maybe so, but in older homes, which are probably 80 to 90% of the homes out there, the wiring is a crap shoot. Everything from knob and tube (yes there is some still in use), with or without insulati
/archives//html/RFI/2016-02/msg00033.html (9,771 bytes)

390. Re: [RFI] cops zero in on noisy grow light ballasts (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 3 Feb 2016 20:57:38 -0500
More and more there are Grow lamps in legal situations such as green houses, people wanting natural food, to survivalists. 73 Roger (K8RI) If this is an illegal growing operation why would you want t
/archives//html/RFI/2016-02/msg00034.html (15,605 bytes)

391. Re: [RFI] cops zero in on noisy grow light ballasts (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 11 Feb 2016 09:04:13 -0500
There is one major problem people and hams forget. Pot growing is legal in some states, but it is illegal by federal law in all states and currently the feds are known for not honoring state laws whe
/archives//html/RFI/2016-02/msg00055.html (10,112 bytes)

392. [RFI] RFI chasing. and cable leaks. (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 11 Feb 2016 10:00:14 -0500
"Used to be" on cable, I believe 145.25 was the audio sub channel for cable ch 18. I don't know what they have there now with digital, but I don't thing they had to change. I posted this quite a whil
/archives//html/RFI/2016-02/msg00056.html (10,170 bytes)

393. Re: [RFI] Doorbell Transformer RFI ?? (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Tue, 15 Mar 2016 15:50:36 -0400
I'll try again: The "door bell" problem has been around since before switch mode power supplies existed. I think it may even predate the disconnected TV preamp in the attic. I think we can rule out t
/archives//html/RFI/2016-03/msg00039.html (10,140 bytes)

394. Re: [RFI] House Ground (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 16 Mar 2016 16:48:49 -0400
When we put in a 200A service, there was the regular three ground rods for the panel and meter. However, the grounding in the house ranged from sensical, to you gotta be kidding.. As the electrician
/archives//html/RFI/2016-03/msg00061.html (14,416 bytes)

395. Re: [RFI] House Ground (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 16 Mar 2016 16:54:43 -0400
Many of today's PCs have a plastic case. The only metal is the PS case and some traces on the motherboard. They can be a real bear when hooked to a wired network. 73 Roger (K8RI) Many modern, small p
/archives//html/RFI/2016-03/msg00062.html (10,571 bytes)

396. Re: [RFI] House Ground (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 16 Mar 2016 17:56:38 -0400
I added a 3 KVA, true sin wave generator with regulated output. I'm in the process of getting the two big computers (4 and 5 GHz) and the entire station (except the big amp) That 240 VAC circuit runs
/archives//html/RFI/2016-03/msg00063.html (14,758 bytes)

397. Re: [RFI] RFI via Florescent Lights (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Tue, 5 Apr 2016 15:17:29 -0400
I have 11, 8', 2 75W tube fixtures from Lowe's, in my shop. The station in the shop covers 160 through the 440 bands. The 40 meter sloper passes within 10 feet of the E end of the shop. LM470 in 10'
/archives//html/RFI/2016-04/msg00008.html (9,463 bytes)

398. Re: [RFI] RFI via Florescent Lights (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 9 Apr 2016 02:59:26 -0400
These would have been new around 2000 to 2002, "I think" 73, Roger (K8RI) On 4/7/2016 Thursday 7:24 AM, Charles Coldwell wrote: On Tue, Apr 5, 2016 at 3:17 PM, Roger (K8RI) <k8ri@rogerhalstead.com> w
/archives//html/RFI/2016-04/msg00027.html (9,315 bytes)

399. Re: [RFI] RFI via Florescent Lights (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 9 Apr 2016 03:09:58 -0400
That would be a complete replacement of fixtures, with full spectrum LEDs of 5,000 to 6,000 Lumens per tube, or about 10,000 per fixture. I'd like the electrical , but the equivalent of 10,000 Lumens
/archives//html/RFI/2016-04/msg00028.html (10,803 bytes)

400. Re: [RFI] RFI via Florescent Lights (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 9 Apr 2016 03:37:23 -0400
To replace 11 2 tube, 8' fixtures would take 22 4' fixtures At $40 each = $880, plus the rewiring (all in surface mount conduit) , unless I could get 8' LED replacements. If I didn't drop a decimal,
/archives//html/RFI/2016-04/msg00029.html (13,028 bytes)

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