tag:blogger.com,1999:blog-5837660608809488753.post2156450987566545550..comments2024-03-28T20:53:49.167-04:00Comments on The Adventures of Roberta X: This Shouldn't HappenRoberta Xhttp://www.blogger.com/profile/09956807794520627885noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-5837660608809488753.post-14239929255090821472015-01-20T18:49:50.452-05:002015-01-20T18:49:50.452-05:00Don's Channing's main contribution was to ...Don's Channing's main contribution was to organize and otherwise stay out of the way of the mad scientists and irritated engineers, IIRC. It was Walter Franks who made things look easy.Ian Argenthttps://www.blogger.com/profile/03704336044732061128noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-85721467730012558192015-01-19T11:22:13.693-05:002015-01-19T11:22:13.693-05:00QX to your Kim Kinnison name-check, ace. :-)QX to your Kim Kinnison name-check, ace. :-)Kenhttps://www.blogger.com/profile/04780425923108876647noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-89315565410002223302015-01-19T08:34:29.612-05:002015-01-19T08:34:29.612-05:00This comment has been removed by the author.Scott_Shttps://www.blogger.com/profile/14646683071614664257noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-75634089488246895712015-01-19T08:31:50.203-05:002015-01-19T08:31:50.203-05:00Not enough money or guns -Not enough money or guns -Scott_Shttps://www.blogger.com/profile/14646683071614664257noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-52245455162526842872015-01-19T06:10:15.731-05:002015-01-19T06:10:15.731-05:00Thanks, at lest it did not fall down like this one...Thanks, at lest it did not fall down like this one I was taken to see as a kid. http://en.wikipedia.org/wiki/Emley_Moor_transmitting_stationAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-15201630801983159702015-01-18T20:41:05.179-05:002015-01-18T20:41:05.179-05:00Pretty much "yes." It's all bad. S...Pretty much "yes." It's all bad. SWR goes up, range is reduced, the antenna can be damaged.<br />Roberta Xhttps://www.blogger.com/profile/09956807794520627885noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-80531533492419174792015-01-18T15:43:18.909-05:002015-01-18T15:43:18.909-05:00Out of interest is the main problem with the weigh...Out of interest is the main problem with the weight of the ice or a reduction in the range / signal strength?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-53642163153718535162015-01-18T09:08:49.162-05:002015-01-18T09:08:49.162-05:00Indeed. I was, of course, joking. If it were that ...Indeed. I was, of course, joking. If it were that easy, anyone (and everyone) would do it and there wouldn't be the incredibly complex de-icing systems in use.<br /><br />It is really simple until actual physics just come up and slap you in the face....B https://www.blogger.com/profile/10586046436233366155noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-26410576489620182072015-01-18T08:28:16.390-05:002015-01-18T08:28:16.390-05:00It is always fascinating to consider what happens ...It is always fascinating to consider what happens at radio frequency. Even folks who deal with DC and 60 hertz stuff get confused.<br /><br />Show an electrician a loop antenna and watch the steam come out of their ears. "That's a short-circuit! That can't possibly work."Debra KI4TONhttps://www.blogger.com/profile/09033996776573811278noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-1080451426944176542015-01-18T08:21:40.230-05:002015-01-18T08:21:40.230-05:00B: Your theory fascinates me, and I wish to subscr...B: Your theory fascinates me, and I wish to subscribe to your newsletter. ;)<br /><br /> Microwaves from what source? Magic microwaves that don't cause dielectric heating of the PTFE insulators in the coax? That get through the much lower frequency power dividers? ...etc.<br /><br /> It's never as easy as Don Channing and Kimball Kinnison made it look. Roberta Xhttps://www.blogger.com/profile/09956807794520627885noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-23956473688724528522015-01-17T21:00:21.447-05:002015-01-17T21:00:21.447-05:00Just send microwaves through the coax for a few se...Just send microwaves through the coax for a few seconds....<br /><br />Melt the ice. <br /><br />IIRC something like 1.2 GZ or something? <br /><br />B https://www.blogger.com/profile/10586046436233366155noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-32093222799330890952015-01-17T20:39:31.300-05:002015-01-17T20:39:31.300-05:00Thank you for the enlightenment.
I'm still o...Thank you for the enlightenment.<br /> I'm still of the "see ice, turn on sequenced de-icing elements, let them cycle" school. And I certainly no experience with de-icing an antenna itself. <br /><br />I wondered if the de-icers were separate from the antenna elements and how well they worked and played together.rickn8orhttps://www.blogger.com/profile/16911803300343351338noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-72240664185072847282015-01-17T20:19:09.535-05:002015-01-17T20:19:09.535-05:00Literally "send:" there's an elevato...Literally "send:" there's an elevator, but no controls in the car. They're at ground level.<br /><br /> The de-icing system directly detects the formation of ice, by sensing the detuning of a high-stability mechanical oscillator in an exposed location. (It is locked out of the temperature is above 40.) When it detects ice, it de-ices itself (the element is the size of a fat pencil) and turns on the de-icers for a set period of time. If ice reforms, it retriggers the de-icers. And the fun part? The "de-icers" are also the spiral antenna elements you see in the photo; they use some clever tricks to send high-current, low-voltage AC through them and warm them up without bothering radio frequency energy they are radiating.Roberta Xhttps://www.blogger.com/profile/09956807794520627885noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-72764577654119717282015-01-17T20:01:42.202-05:002015-01-17T20:01:42.202-05:00So what's the deal? Thermostat that decides w...So what's the deal? Thermostat that decides when to turn the de-icers on or the relay, etc. that the thermostat controls no worky?<br /><br />(I know how to do de-icing on airplanes and such but not on the ground, hence the use of the technical term "worky.")<br /><br />And I like your use of the phrase "Send a crew."rickn8orhttps://www.blogger.com/profile/16911803300343351338noreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-9041256078669886842015-01-17T12:51:40.774-05:002015-01-17T12:51:40.774-05:00Tennis raquets?
Is that some new high-tech tool ...Tennis raquets? <br /><br />Is that some new high-tech tool I'm not aware of?danielshttp://www.amongtheleaves.comnoreply@blogger.comtag:blogger.com,1999:blog-5837660608809488753.post-87978830208824661712015-01-17T06:51:26.606-05:002015-01-17T06:51:26.606-05:00Busted defranistator.... hate it when that happens...Busted defranistator.... hate it when that happens.<br /><br />I'll say..... there isn't enough money available to get me to climb that tower, ice or no.Carteachhttps://www.blogger.com/profile/08468700184940877315noreply@blogger.com