Snow static as well during blizzards do wonders to light up a neon bulb. I used to put one between my long-wire and ground, even wind when it would get a good swing would do the same thing
Fred VE3FAL Sent from my iPhone Fred VE3FAL/CIW649 > On Oct 31, 2018, at 19:13, Rose <[email protected]> wrote: > > Fred, > > I recall the output capacitor of the pi-net capacitor in my HT-17 > rythmatically snapping in response to the charged particles of dust in the > dry Oklahoma air > building up on the long wire antenna. (;-) > > 73 ! > > K0PP > [email protected] > >> On Wed, Oct 31, 2018, 16:42 Fred Jensen <[email protected] wrote: >> >> Hmmm ... There seem to be different flavors of static. My reference was >> to what is often called "precipitation static" [rain, snow, maybe hail] >> and which can sometimes also be caused by wind blowing sand/dust past >> the antenna. It sounds like bacon frying in the receiver. Each drop or >> snowflake acquires a minuscule charge falling or blowing which >> discharges into the antenna on contact. The typical semiconductor >> devices in radio front ends these days exhibit a nearly infinite >> impedance to "ground" and a tiny capacitance. The constant little >> pulses from the static charge that capacitance with essentially no >> discharge path. That's what fried the 1st 760 II and then, predictably, >> the second one. >> >> There is also the combined "static" caused by distant thunderstorms. >> >> INT QRN: "Are you troubled by static" >> QRN: "I am troubled by static" >> >> which is different than "static" caused by corona or leakage on a high >> voltage power transmission line. >> >> 73, >> >> Fred ["Skip"] K6DGW >> Sparks NV DM09dn >> Washoe County >> >> PS: For those about to tell me "nearly infinite" is a meaningless term, >> save the BW. I know, I hold a math degree. Just using a little >> editorial license. >> >>> On 10/31/2018 3:10 PM, ab2tc wrote: >>> Hi, >>> >>> It's a dead short circuit for DC and low frequencies thanks to the SWR >>> bridge (it has a voltage transformer directly across the antenna >> terminals). >>> There seems to be different opinions on what is meant by "static". To me >> it >>> means a slowly varying DC voltage caused by static buildup in the clouds >>> during or before thunderstorms. The K3(S) is perfectly protected against >>> these. Some people include the transients that are caused by actual >>> lightning strikes nearby in the definition of "static". The K3(S) is not >>> protected against these as they have very strong high frequency content. >> For >>> these extra protection is needed as discussed several places in this >> thread. >>> I have a number of Alpha-Delta switches in my antenna system and they >> have >>> gas discharge tubes, but frankly I have no idea how effective they are. >>> >>> AB2TC - Knut >>> >>> >>> wayne burdick wrote >>>>> On Oct 30, 2018, at 12:50 PM, Fred Jensen < >>>> k6dgw@ >>>> > wrote: >>>>> Does my K3 have a static bleed across the antenna terminal(s)? >>>> Yes. >>>> >>>> Wayne >>>> N6KR >>>> <snip> >>> >>> >>> >>> >>> -- >>> Sent from: http://elecraft.365791.n2.nabble.com/ >>> ______________________________________________________________ >>> 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 >>> Message delivered to [email protected] >>> >> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] > ______________________________________________________________ > 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 > Message delivered to [email protected] > ______________________________________________________________ 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 Message delivered to [email protected]
