Very nice!! Fun test... You're nuts! But hey so am I. I take it you have the 250Hz 8-pole filter in your radio in order for that to happen?
~Brett (N7MG) On Fri, 2010-07-23 at 23:34 +0000, Rick Stealey wrote: > > So now we know it wasn't caused by overload. But since I went to the trouble > of hauling my signal generator up to the shack and connecting it to my K3 I > figured you guys might like to know how your K3 will stand up to a big signal > on the broadcast band. Let's not be so quick to assume this fantastic > receiver can be overloaded to the point where it generates 20 over 9 signals > on 160 and 80 meters !!!!!!! > > The 8640B is connected to the K3 through a coupler, and the antenna is > connected to the other port. The generator is tuned to 940 KHz and the K3 is > tuned to 1880 and 3760. > The generator is cranked up till the K3 hears a signal at about S5 on 1880, a > little over my local static level. The generator is putting out -40 dbm. S5 > is about a -100 dbm signal. > Most likely the S5 signal is the 2nd harmonic of the signal generator, 60 db > down, not caused by the K3, because guess why? Because putting the > attenuator on doesn't kill the signal like it would if it was internally > generated. Your K3 isn't going to be bothered by killer AM broadcast band > signals, at least not to the point where it generates 20 over 9 spurs, fear > not !! > > Just for kicks (I've always wanted to do this) I tuned in some EU stations > around 7008. > Then set the generator to -20 dbm. Now let me tell you , -20 dbm is one, > friggin, HUGE signal. And tuned it down the band until its effect was > noticible on the weak signals. Want to guess how close I could get? 7008.3 > !! 300 cycles away from weak Europeans, with a 60 db over 9 interfering > signal!!!! > > Rick K2XT > > _________________________________________________________________ > Hotmail is redefining busy with tools for the New Busy. Get more from your > inbox. > http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_2 > ______________________________________________________________ > 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
