Hi Tom, You'll get a lot of opinions on noise blankers, I suspect :)
Here's my 2 cents: The K3's combination of two noise blankers -- one at the 1st IF and one at the DSP -- can work wonders on all sorts of noise. But it's especially good with power-line noise (loads of that at my QTH). The K3 doesn't pre-filter down to 15 kHz, which means the sharp pulse rise-times are preseved. This means you can typically keep the IF blanker's threshold very high, minimizing the type of IMD that all IF blankers cause. The DSP blanker is icing on the cake, especially if you also have complex noise like that from switching supplies, etc. (stuff that drifts a lot). That said, I suggest you borrow a K3 and try it at your QTH. We can find a nearby K3 owner for you, or you can ask on the reflector. Good luck with whatever rig you choose, and don't hesitate to post further questions. 73, Wayne N6KR On Jan 6, 2010, at 5:38 PM, Tom Bickley 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:[email protected] > > 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
