Hi Tom, Well, I have a K3 noise blanker story for you.
About two months ago, I suddenly had an S9+20 line noise problem around here. I knew it was some type of failed Edison equipment, or maybe something at a residence. It was loud enough to hear with a stubby for ANT1, and on 80m through 30m under any conditions. I had to diddle the K3's noise blanker a bit to get it dialed in right, but I finally killed the crud on the Main and Sub receivers. There was a residual amount of distortion; I had never run the NB this aggressively before - never had to. However, effectively the noise was blanked down to S7 or so on 40m where it was the worst. And it made 80m usable again on CW... In a few days, an Edison power quality tech came out and located the noise source. Some customer-owned (but unused) transformers on a citrus farm a few blocks from us had open primaries. He had the feed to them disconnected and notified the owner that they needed to be replaced (they weren't working anyway). These transformers were used to power irrigation pumps, so the owner got the problem cleared up right away. I was completely amazed how well the NB works under very difficult conditions. May no one else have to find out how well this feature works in the same way or for a similar reason. 73, matt W6NIA K3 #24 K2 #2810 Except for being a paying customer, I have no formal affiliation with Elecraft. On Thu, 07 Jan 2010 01:38:35 +0000, you wrote: > >I'm overdue for a new radio (at least, that's what I am telling my >XYL). In considering the purchase, unfortunately one of the major >considerations I must take into account is >the noise blanker function. I have recently moved to an area with A LOT >of power line noise. I have high voltage lines around my immediate QTH. >It is a constant S3 to S5 on all bands above 7 MHz and, sometimes on >really >cold mornings, a seperate, additional noise kicks in that takes it to >S9 or more. I am trying to locate these noise sources but have been >unable to so far. I must run the noise blanker on my old TS-850s at all times >to help me manage this problem. With the NB engaged (which >is 'always') I have audio distortion created from nearby signals, >especially stronger signals within 30 >kc's of my receive frequency, no matter at what level I run either of the noise >blankers. > >I would like to hear from K3 owners who might have >'line noise problems' and know how the noise blanker in your K3 handles >the problem. > >Mni Tnx / 73 > K4NA > >_________________________________________________________________ >Hotmail: Powerful Free email with security by Microsoft. >http://clk.atdmt.com/GBL/go/196390710/direct/01/ >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
