My Honda EU2000i inverter generator also puts out a very clean sine wave. If you look reeeeal close you can see the inverter "steps", but it's NOTHING like a modified sine wave inverter like you'd plug into your cigarette lighter socket to power something. Jim KQ6EA
--- On Sun, 6/28/09, Jim Manner <jeman...@yahoo.com> wrote: From: Jim Manner <jeman...@yahoo.com> Subject: Re: [Flexradio] receiver behavior when operating off of emergencygenerator To: flexradio@flex-radio.biz Date: Sunday, June 28, 2009, 8:51 PM Can't speak for others, but have scoped the Honda EU3000is, and it is a true sine wave. However, will have to confess, never operated a radio with it. Jim N7SGS -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Howard S. White Sent: Sunday, June 28, 2009 8:29 PM To: Jim; flexradio@flex-radio.biz Subject: Re: [Flexradio] receiver behavior when operating off of emergencygenerator Typically low cost generators with inverters produce Square Waves rather than Smooth Sine Waves normally found when you connect to the Utility Company power. The Square waves consist of lots and lots of useless noise. __________________________________________________________ Howard S. White Ph.D. P. Eng., VE3GFW/K6 ex-AE6SM KY6LA Website: www.ky6la.com "No Good Deed Goes Unpunished" "Ham Antennas Save Lives - Katrina, 2003 & 2007 San Diego Fires, 911" -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Jim Sent: Sunday, June 28, 2009 5:30 PM To: flexradio@flex-radio.biz Subject: [Flexradio] receiver behavior when operating off of emergencygenerator Here's the scenario: 3000 watt inverter generator located about 50 feet, outside, from my flex 5000. Heavy duty extension cord routed from the generator through a window into my shack to a power strip. Computer, monitor, and DC power supply for the flex plugged into power strip. Generator started, computer, dc power supply, monitor, and flex turned on. Everything looks fine while operating - that is, the computer boots up just fine, the monitor looks great, power sdr launches just fine. Then I notice a few odd things: Noise on all bands audible in the headset connected to the flex that require I select the noise blankers on powersdr. Seeing hardly any transmissions at all on the panadapter and those are pretty low signal strength. I switch back to normal utility company power and bazillions of signals are now seen on the panadapter and of course no noise requiring the noise blanker filters. Clearly the generator is creating rf interference and most likely the extension cord running from the generator to my shack is resonating causing a larger noise problem. Why, though, is reception so negatively affected when running off of the generator. I'm thinking I should take the generator ac outlet apart and install some RF chokes. Any recommendations about which ones and where to acquire them? Any other thoughts on this? Thanks very much Jim WD7W _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
