I would be checking your system (including the antenna and nearby structures) for problems ... I'm a whole lot closer to WYFR (105 miles) and they do not generate any overload or "buckshot" on my K3 with SDR-IQ and SpectraVue.
73, ... Joe, W4TV > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Steve Ellington > Sent: Sunday, June 14, 2009 8:32 PM > To: Elecraft@mailman.qth.net; lp-...@yahoogroups.com > Subject: [Elecraft] K3 Overload from WYFR > > > A photo (40 meter Overload) has been uploaded to the file > section of the > LP-PAN Yahoo Group. This photo is a screen capture from > PowerSDR-IF showing > WYFR at 6985Khz and the resulting images on either side of > the carrier. The > K3's preamp was off. Turning on ATTN reduces the levels > somewhat but the > images are still present. These images can be seen on > PowerSDR all the way > up to about 7080kHz while WYFR is transmitting however, > tuning the K3's VFO > to 7030kHz or above eliminates all signs of these images. Buckshot > (distorted bits of modulation) can be heard up to about > 7015Khz. The images shown seem to be generated by the LP-PAN. > Clicking on them moves > them elsewhere and they cannot be heard. Other than the > buckshot at the low > end of 40 meters, audible reception seems to be unaffected > however LP-PAN is > rendered unusable during the evenings. > WYFR is located in Okeechobee, Florida, 631 miles from my QTH in NC. > Naturally their signal is very strong, 60db+ over S9. The > antenna used here > is a 200ft doublet, ladder line and tuner. > Here are my questions and concerns: > 1. Is it normal to expect the K3's front end to overload under these > conditions? > 2. Is it normal for LP-Pan to be rendered useless by strong > BC stations > outside the ham bands like this? > 3. Do you think this could be caused by any defect in the K3 > or station > configuration? > 4. What kind, if any, outboard filter would help? The > internal or external > tuner has no effect (in or out of circuit). > 5. Is anyone else experiencing such an overload? > I'm just trying to pin down exactly where the problem is. It > appears that > the front end in the K3 is allowing too strong of a signal to > hit the LP-PAN > then the K3's roofing filters do their job to protect the > K3's DSP. I have become rather addicted to the LP-PAN. I > can't tell how many times I > have though the band was dead after carefully tuning but a > quick glance at > the screen reveals several stations! > If you are not subscribed to the LP-PAN group, you may view > the photo here: > http://i222.photobucket.com/albums/dd260/n4lq/wyfr.jpg > > 73 Steve N4LQ > > n...@carolina.rr.com > > ______________________________________________________________ > 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
