Re: [Elecraft] OT noise on 17m

2016-03-11 Thread n9tf
aft" <elecraft@mailman.qth.net> Sent: Friday, March 11, 2016 12:46:56 PM Subject: Re: [Elecraft] OT noise on 17m The stuff I have run into that is in the 16 to 18 khz range includes furnace /air conditioner  motor controls and  washing machines. Of course those are intermitten

Re: [Elecraft] OT noise on 17m

2016-03-11 Thread David Anderson
Coincidental I think hi. Yes Aurora on 144 MHz here this afternoon and the magnetometers showing the impact too. 73 from David GM4JJJ > On 11 Mar 2016, at 19:01, KENT TRIMBLE wrote: > > Robert . . . > > *Space Weather News for March 11, >

Re: [Elecraft] OT noise on 17m

2016-03-11 Thread KENT TRIMBLE
Robert . . . *Space Weather News for March 11, 2016*http://spaceweather.com *

Re: [Elecraft] OT noise on 17m

2016-03-11 Thread HankP
The stuff I have run into that is in the 16 to 18 khz range includes furnace /air conditioner motor controls and washing machines. Of course those are intermittent which is also a clue- although there are some furnace/A/C blowers that stay on at low speed all the time for circulation. If

Re: [Elecraft] OT noise on 17m

2016-03-11 Thread Jim Brown
Yet another example of a switch-mode power supply. Here's a preliminary version of k9yc.com/KillingReceiveNoise.pdf that might help. 73, Jim K9YC On Fri,3/11/2016 6:41 AM, Robert G Strickland wrote: Can someone help me understand the "noise" on 17m - and elsewhere - right now? It repeats

Re: [Elecraft] OT noise on 17m

2016-03-11 Thread David Anderson
Bob, Most probably a switched mode power supply somewhere locally, almost everything we see repeated at regular frequency intervals like that are harmonics of SMPS. Often up to VHF unfortunately :-( Have you tried switching off the house breaker and listening on batteries to be sure it isn't

Re: [Elecraft] OT noise on 17m

2016-03-11 Thread ab2tc
Hi, None of it here in Camillus (a suburb west of Syracuse). AB2TC - Knut -- View this message in context: http://elecraft.365791.n2.nabble.com/OT-noise-on-17m-tp7615093p7615096.html Sent from the Elecraft mailing list archive at Nabble.com.

[Elecraft] OT noise on 17m

2016-03-11 Thread Robert G Strickland
Can someone help me understand the "noise" on 17m - and elsewhere - right now? It repeats every 17kc, very strong. Perhaps some sort of over the horizon radar? Is it general or just something in my neighborhood? Thanks much. ...robert -- Robert G Strickland, PhD ABPH - KE2WY