Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Eric Swartz - WA6HHQ, Elecraft
Hi Everyone, In the interest of reducing email overload for our readers, it is time to close this thread as we are over the OT posting limit of 5 to10 at most. Plesse self moderate in the future. 73, Eric Mooderator etc. /elecraft.com/ ___

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread W5RDW
I had this stored on my computer. Good reading on this subject. http://www.arrl.org/forum/topics/view/46 - Roger W5RDW -- View this message in context: http://elecraft.365791.n2.nabble.com/OT-A-C-RFI-tp7632552p7632575.html Sent from the Elecraft mailing list archive at Nabble.com. __

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread John K9UWA
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Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Fred Jensen
We had a well for 38 years, went through three 4 HP down-hole pumps, and I never observed any RFI from it or the control/capacitor box at the well head. The 240 V service to the entrance was buried. The pump ran a lot when the irrigation system was on [making Pacific Gas & Electric very happy

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Jim Brown
On 7/19/2017 7:52 AM, Clay Autery wrote: H Jim... I have a variable speed down-hole pump on my water well... reckon that could cause RFI via the AC wiring? The down-hole pump is 220VDC on dedicated circuit, and shack is on a separate dedicated circuit from same service with separate su

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Jim Brown
This is gross over-simplification, but it is, sadly, the thinking of the EMC community and the regulations on EMC. I've written extensively on this, so won't repeat it here. Here's the most recent. http://k9yc.com/KillingReceiveNoise.pdf And, of course, k9yc.com/RFI-Ham.pdf VERY little RFI

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Clay Autery
Frankly, I've never checked to see if the down-hole pump is an RFI source... Only use the well when I am outside for the most part... That's why I solicited Jim's opinion of the case. I'll have to run a purposely test. I would think I could filter at/near where the AC lines go in/out of the hol

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Chuck, AE4CW
h are usually a burst of very closely spaced carriers (a few hertz apart) spaced about 18KHz apart. --- Chuck, AE4CW -Original Message- From: Clay Autery [mailto:k...@montac.com] Sent: Wednesday, July 19, 2017 10:53:AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT A/C RFI

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Bob McGraw K4TAX
There's basically two types of RFI. Conducted --- Being noise/RFI traveling through the wiring thus via direct connection. Conducted RFI can be attenuated to satisfactory levels by including a power line filter in the system {preferably at the source}. The filter suppresses conducted noise le

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Dave Cole
Clay, Given that the pump is far, far underground, as is most of the wiring, I would expect it to be a trivial matter to filter the AC line, which should be the only thing radiating... Was that the case for you? 73s and thanks, Dave NK7Z http://www.nk7z.net On 07/19/2017 07:52 AM, Clay Auter

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Clay Autery
H Jim... I have a variable speed down-hole pump on my water well... reckon that could cause RFI via the AC wiring? The down-hole pump is 220VDC on dedicated circuit, and shack is on a separate dedicated circuit from same service with separate sub-panel. __ Clay Auter

Re: [Elecraft] OT A/C RFI

2017-07-19 Thread Clay Autery
Please include me in a list of folks who wants to follow/contribute to this topic if/when it goes off-list. I am shopping for HVAC right now... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 7/18/2017 9:00 PM, Dave Cole wrote: > When this goes off list please add m

Re: [Elecraft] OT A/C RFI

2017-07-18 Thread Dave Cole
Thanks Jim! I passed on the variable speed fan option as a result of the vendor telling me I should skip it to avoid possible RFI. He also said it made little difference in performance... BTW I have no detectable RFI from my system. 73s and thanks, Dave NK7Z http://www.nk7z.net On 07/18/2

Re: [Elecraft] OT A/C RFI

2017-07-18 Thread Jim Brown
On 7/18/2017 6:02 PM, Erik Basilier wrote: Need to replace my A/C, and worried about getting an RFI generator. A few years ago I saw some advice about taming a new unit, and maybe even getting instructions from the manufacturer. Dave Cole has given you excellent advice, and you should follow i

[Elecraft] OT A/C RFI

2017-07-18 Thread James Wilson
I'm sure all of us Elecraft users would be interested in your findings. One suggestion - broach the subject with your contractor / dealer. Let him find from his supplier what the noise situation is and how their factory says they can cure it. The one with the best assistant may be the better cho

Re: [Elecraft] OT A/C RFI

2017-07-18 Thread Dave Cole
When this goes off list please add me as well... Don't tell them what to do, tell them you want no RFI. If you tell them what to do, and it does not work, it is your issue... Make it their issue. See my previous post. 73s and thanks, Dave NK7Z http://www.nk7z.net On 07/18/2017 06:54 PM, K

Re: [Elecraft] OT A/C RFI

2017-07-18 Thread Dave Cole
Write it into the contract that the unit will not generate RFI above some level you are happy with, as received at your radio, using your current antenna, across the entire spectrum your radio covers. I did, and the installers then made sure it was RFI proof... I wrote it into the contract in

Re: [Elecraft] OT A/C RFI

2017-07-18 Thread Kevin der Kinderen
The timing is perfect. Please keep it on the list or add me to your direct replies. Maybe we can cut it short of the limit for OT subjects without needing a reminder. I have not had an AC since last summer and have also not had any noise around the shack. Now it's just getting to hot to deal witho

[Elecraft] OT A/C RFI

2017-07-18 Thread Erik Basilier
Need to replace my A/C, and worried about getting an RFI generator. A few years ago I saw some advice about taming a new unit, and maybe even getting instructions from the manufacturer. Things change all the time, and at this point I would like to hear from anyone with fresh advice: Brands to con