Your Trying to figure out Propagation ? GoodLuck WA6VAB
From: David Haines Sent: Tuesday, December 15, 2020 9:47 AM To: Louandzip; [email protected] Subject: Re: [Elecraft] Ice on dipole under snow under ice Update: With one-quarter of one leg of the dipole still under ice, I got a reception report from PSKReporter on FT8 with 2 watts to Italy. That shouldn't work, should it? Maybe the ice doesn't matter? KD5VXH recalled a discussion in QST on this very subject, where 400W AM melted the ice on one leg of the dipole (fed by coax), but not the other. ' You can follow the controversy in May and July 1960 letters in QST! david KC1DNY On 12/13/2020 4:36 PM, Louandzip wrote: > I haven't given this a lot of thought but: > > 1. Virtually none. 100W most radiated, leaving very little heating > the ice/snow along your long cold wire. The wire itself won't heat up > as it has very low resistance. > > 2. IDK about the KXPA100, but Tune is often done at low power, so if > 100W work, Tune certainly won't. > > 3. Need to check the SWR, but even if good initially, may vary a lot > as ice/snow situation changes. This might test the SWR capability of > the tuner and protection of the amp, which is best left untested. > > If you do try it, keep it legal: Check the freq before transmitting, > and be sure to identify. Let us know how it goes. This might be the > excuse you've needed to get that legal limit amp you've been wanting. > > Lou W7HV > > > On Sunday, December 13, 2020, 11:40:18 AM MST, David Haines > <[email protected]> wrote: > > > Before I try something crazy, like climbing up on the roof ... . > > We had an ice storm. The ice pulled my wire dipole down to the roof, > but didn't break it because one mask was Schedule 30, which leaned over > nicely. It then snowed on top of the ice. > > I've been able to free the feedline (ladderline) and most of the dipole, > but part of the dipole is till under the snow under a layer of ice way > up on the roof. > > I'm thinking of running 100W from my KXPA100 to melt it out of there, > but before I try: > > 1. Is there any chance of this working? > 2. Should I just transmit a TUNE through it? > 3. Can I damage the KXPA100 or tuner? > > Right now the coax is not connected to the KX3 and I haven't tried to > receive. > > david > KC1DNY > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > <http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm> > Post: mailto:[email protected] <mailto:[email protected]> > > This list hosted by: http://www.qsl.net <http://www.qsl.net> > Please help support this email list: http://www.qsl.net/donate.html > <http://www.qsl.net/donate.html> > Message delivered to [email protected] <mailto:[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]
