From k5hab at arrl.net Fri Nov 2 20:23:51 2018 From: k5hab at arrl.net (k5hab at arrl.net) Date: Fri, 2 Nov 2018 19:23:51 -0500 Subject: [HCARC] Last nights presentation Message-ID: Dear fellow members Jim Froemke?s, K0MHC, presentation last night was great, informative and had a lot of enthusiasm. It also has some really wrong information. Like life and death information. You cannot use a cigarette plug for power. Here is a picture of a Cadillac Escalade dash after a 100 milliamp GPS was plugged into the cigarette light with a 1 amp fuse. There is another photo of a Chevy Suburban, which I do not have a copy of, showing the burned interior and a child?s arm. This was caused by a laptop charger plugged into a cigarette outlet. The child died. The number one cause of car fires, after accidents, are cigarette plugs. The problem is not that the plug is not fused for say 10 amps or that the 16 gauge wire will not carry the current. It is that one amp at 12 volts will generate 12 watts of energy or heat and melt the wire. Hear with permission is a quote from K0BG?s excellent website: Do Not Use Existing Vehicle Wiring Never, ever use existing vehicle wiring to power any amateur radio gear. This includes fuse taps, and so-called accessory sockets, aka cigarette lighter sockets! In part from the National Fire Protection Association , sub-section 15-3.2.1: Overloaded Wiring. Unintended high-resistance faults in wiring can raise the conductor temperature to the ignition point of the insulation, particularly in bundled cables such as the wiring harnesses or the accessory wiring under the dash where the heat generated is not readily dissipated. This can occur without activating the circuit protection. There's rarely a single cause for any given car fire, even if an investigator can trace all the way back to the incident that sparked the blaze. It's more likely that there was a combination of causes: human causes, mechanical causes, and chemical causes, and they all worked together to create an incredibly dangerous situation. The process is called thermolysis (aka pyrolysis). It is the decomposition of the insulation covering the wire, brought about by high temperatures?resistive heating in other words. Thermolysis may occur within a few minutes, or over an extended length of time. Ignore this rule, and your vehicle may end up looking like a burnt cinder! We all plug in our phone chargers, our computer chargers, our radar detectors, our GPSs and on and on into cigarette lighters. Do not do it. Wire directly and do not use a cigarette lighter for any electrical connections. I will address the PVC antenna support tie raped to the cargo rack when I calm down. Please stay safe out there. 73 Peter K5hab From sgriffin1 at windstream.net Sat Nov 3 11:48:11 2018 From: sgriffin1 at windstream.net (=?utf-8?B?c2dyaWZmaW4xQHdpbmRzdHJlYW0ubmV0?=) Date: Sat, 3 Nov 2018 15:48:11 GMT Subject: [HCARC] ISS Message-ID: <000f4242.0ac1e6d32be709cc@windstream.net> I just heard the ISS flyover my qth and I just heard the female astronaut making contacts with regular amateur operators. Unfortunately I didn't get here on time and I did try to make contact with the space station but by the time I got the satellite program up I was out of their footprint but she had a fantastic signal.WD5ENHSteve Happy Connecting. Sent from my Sprint Phone. From n5baa at hctc.net Sat Nov 3 20:49:39 2018 From: n5baa at hctc.net (Gary Johnson) Date: Sat, 3 Nov 2018 19:49:39 -0500 Subject: [HCARC] Goodwill Auction of Older Radios Message-ID: <4B87A54D994B44A0A6F3585FB4E505E8@GaryPC> https://www.shopgoodwill.com/Listings?st=&sg=&c=7&s=12&lp=0&hp=999999&sbn=False&spo=False&snpo=False&socs=False&sd=False&sca=False&caed=11/21/2017%2012:00:00%20AM&cadb=7&scs=False&sis=False&col=0&p=4&ps=40&desc=False&ss=0&UseBuyerPrefs=true 73, Gary J NA3VY From bucket at janeandjohn.org Sun Nov 4 09:14:13 2018 From: bucket at janeandjohn.org (John Canfield) Date: Sun, 4 Nov 2018 08:14:13 -0600 Subject: [HCARC] Goodwill Auction of Older Radios In-Reply-To: <4B87A54D994B44A0A6F3585FB4E505E8@GaryPC> References: <4B87A54D994B44A0A6F3585FB4E505E8@GaryPC> Message-ID: <971a13e8-7acb-1cd8-e021-f0b06ba6be2d@janeandjohn.org> Some nice gear but I think it's in California - maybe pickup only? John WB5THT On 11/3/2018 7:49 PM, Gary Johnson wrote: > https://www.shopgoodwill.com/Listings?st=&sg=&c=7&s=12&lp=0&hp=999999&sbn=False&spo=False&snpo=False&socs=False&sd=False&sca=False&caed=11/21/2017%2012:00:00%20AM&cadb=7&scs=False&sis=False&col=0&p=4&ps=40&desc=False&ss=0&UseBuyerPrefs=true > > 73, > > Gary J > NA3VY > ______________________________________________________________ > HCARC mailing list > Home: http://mailman.qth.net/mailman/listinfo/hcarc > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:HCARC at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From qltfnish at omniglobal.net Sun Nov 4 10:09:28 2018 From: qltfnish at omniglobal.net (Gary J - N5BAA) Date: Sun, 4 Nov 2018 09:09:28 -0600 Subject: [HCARC] Goodwill Auction of Older Radios In-Reply-To: <971a13e8-7acb-1cd8-e021-f0b06ba6be2d@janeandjohn.org> References: <4B87A54D994B44A0A6F3585FB4E505E8@GaryPC> <971a13e8-7acb-1cd8-e021-f0b06ba6be2d@janeandjohn.org> Message-ID: <96D28F163E1E40629F89CED0E8CBA941@GaryPC> No John. I checked one item and the shipping and handling was about $30.00. Check the shipping on the items. They are in the San Diego area I believe. 73 Gary J NA3VY -----Original Message----- From: John Canfield Sent: Sunday, November 4, 2018 8:14 AM To: hcarc at mailman.qth.net Subject: Re: [HCARC] Goodwill Auction of Older Radios Some nice gear but I think it's in California - maybe pickup only? John WB5THT On 11/3/2018 7:49 PM, Gary Johnson wrote: > https://www.shopgoodwill.com/Listings?st=&sg=&c=7&s=12&lp=0&hp=999999&sbn=False&spo=False&snpo=False&socs=False&sd=False&sca=False&caed=11/21/2017%2012:00:00%20AM&cadb=7&scs=False&sis=False&col=0&p=4&ps=40&desc=False&ss=0&UseBuyerPrefs=true > > 73, > > Gary J > NA3VY > ______________________________________________________________ > HCARC mailing list > Home: http://mailman.qth.net/mailman/listinfo/hcarc > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:HCARC at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ HCARC mailing list Home: http://mailman.qth.net/mailman/listinfo/hcarc Help: http://mailman.qth.net/mmfaq.htm Post: mailto:HCARC at mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From cw4evr at hctc.net Mon Nov 5 08:49:44 2018 From: cw4evr at hctc.net (Fred) Date: Mon, 5 Nov 2018 07:49:44 -0600 Subject: [HCARC] Microsoft updates Message-ID: Windows 10 users need to look at this.? I don't use windows 10 so can't verify it. https://askbobrankin.com/warning_dont_click_this_button.html?rankin-dontclick=&utm_source=newsletter&utm_medium=email&utm_campaign=november_newsletter_1&ad_id=505745&share-ad-id=1 Fred From kd5wdq at gmail.com Mon Nov 5 19:09:01 2018 From: kd5wdq at gmail.com (kd5wdq) Date: Mon, 5 Nov 2018 18:09:01 -0600 Subject: [HCARC] Microsoft updates In-Reply-To: References: Message-ID: Wow, not surprised.... I have a Win 8.1 system and have turned off all updates. It has but one reason to exist, it runs my SNA. Last time I was out for a club meeting I said this: "Win10 is a VIRUS that emulates a Operating System (OS)." (why do you think they were giving it away for free?) Windows is crap, Linux forever... AF5SA From owencomps at gmail.com Mon Nov 5 19:17:41 2018 From: owencomps at gmail.com (Ray Owen) Date: Mon, 5 Nov 2018 18:17:41 -0600 Subject: [HCARC] Microsoft updates In-Reply-To: References: Message-ID: <36a801e1-1dc9-08fe-6fe0-b8a3a6a718fc@gmail.com> That is true.? And the regular updates are bad enough, but the beta stuff will make a real mess. Ray Owen Owen Computer Solutions 830.998.0914 K5WRO On 11/5/2018 7:49 AM, Fred wrote: > Windows 10 users need to look at this.? I don't use windows 10 so > can't verify it. > > https://askbobrankin.com/warning_dont_click_this_button.html?rankin-dontclick=&utm_source=newsletter&utm_medium=email&utm_campaign=november_newsletter_1&ad_id=505745&share-ad-id=1 > > > Fred > > ______________________________________________________________ > HCARC mailing list > Home: http://mailman.qth.net/mailman/listinfo/hcarc > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:HCARC at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From kd5wdq at gmail.com Tue Nov 6 14:56:25 2018 From: kd5wdq at gmail.com (kd5wdq) Date: Tue, 6 Nov 2018 13:56:25 -0600 Subject: [HCARC] Microsoft updates In-Reply-To: <2eef2948-9468-8b08-117a-f77fda19d8b0@hctc.net> References: <2eef2948-9468-8b08-117a-f77fda19d8b0@hctc.net> Message-ID: Wise Choice Fred... Mint is a good choice, as is any Debian distro. BTW: Tried the RTL dongles, AirSpy, HackRF, and LimeSDR all on Linux and had little problems getting any to work. (yeah, in a few cases, had to do more work as compared to a "Mind-less" Windows install.) In the end it was worth it, for not much effort. AF5SA Linux Forever -- Windows sucks... On 11/5/18, Fred wrote: > You know Eddie, I made the mistake of buying windows 10 and loading it a > couple years ago. Then wiped the disk and put the installation disk in > the shredder. I use Linux mint, and if I ever get all the radio stuff to > work on Linux even windows 7 is going away. Just haven't had the time > to mess with it lately. > 73 > Fred > > On 11/5/2018 6:09 PM, kd5wdq wrote: >> Wow, not surprised.... >> >> I have a Win 8.1 system and have turned off all updates. >> It has but one reason to exist, it runs my SNA. >> >> Last time I was out for a club meeting I said this: >> "Win10 is a VIRUS that emulates a Operating System (OS)." >> >> (why do you think they were giving it away for free?) >> >> Windows is crap, Linux forever... >> AF5SA > > From w4wj at aol.com Wed Nov 7 01:27:53 2018 From: w4wj at aol.com (w4wj at aol.com) Date: Wed, 7 Nov 2018 01:27:53 -0500 Subject: [HCARC] Frequency Measuring Test Message-ID: <166ecdb195f-1ec4-e2e@webjas-vad026.srv.aolmail.net> Hello all... The Winter FMT will be held this coming Thursday evening NOV 8th (Friday NOV 9th GMT). ? There will be 2 sessions:? ? EARLY starting at 0200Z (2000 local, Thursday evening) ? LATE? ? starting at 0500Z (2300 local, Thursday evening) ? The FMT transmissions will originate from K5CM, Connie Marshall at Muskogee, OK. ? Those transmissions will be on 40 and 80 meters.? Connie will transmit on the same 40 & 80m frequencies during the EARLY?and LATE session. ? After the session, you will have until until 0200Z November 12th to submit your frequencies.? NOTE:? You will submit only one entry for 40 and one entry for 80m. ? Those submissions should be made at: www.b4h.net/fmt/fmtentry.php ? The form is straight forward. ? Here are the call up times. ? EARLY SESSION 40m near 7064KHz 0200Z CALL UP 0203Z KEY DOWN 0205Z END 40m RUN ? 80m near 3598KHz 0215Z CALL UP 0218Z KEY DOWN 0220Z END 80m RUN ? ? LATE RUN 40m near 7064KHz 0500Z CALL UP 0503Z KEY DOWN 0505Z END 40m RUN ? 80m near 3598 0515Z CALL UP 0518Z KEY DOWN 0520Z END 80m RUN ? The FMT was mentioned on pg 92 of the NOVEMBER QST. Page 94 of the online QST. ? This is a fun event. There are references to the FMT in the QST article.? If you do submit a reading, you will be able to see your results a few days later!! ? SEE HOW CLOSE YOU CAN GET!! ? Questions??? Email me! ? 73 Don W4WJ From owencomps at gmail.com Wed Nov 7 03:36:21 2018 From: owencomps at gmail.com (Ray Owen) Date: Wed, 7 Nov 2018 02:36:21 -0600 Subject: [HCARC] Microsoft updates In-Reply-To: References: <2eef2948-9468-8b08-117a-f77fda19d8b0@hctc.net> Message-ID: <15a5c493-c669-ae97-4fb7-74669c830822@gmail.com> Just an FYI.? If anyone needs a hand, I'll be happy to help with Linux.? My number is 830.998.0914.? I do run a computer company 9-5, and run a ranch, but I'll be happy to get back to you and help you, and will come out for no charge to help our HAM community. Ray Owen Owen Computer Solutions 830.998.0914 K5WRO On 11/6/2018 1:56 PM, kd5wdq wrote: > Wise Choice Fred... > > Mint is a good choice, as is any Debian distro. > > BTW: Tried the RTL dongles, AirSpy, HackRF, and LimeSDR > all on Linux and had little problems getting any to work. > (yeah, in a few cases, had to do more work as compared to > a "Mind-less" Windows install.) In the end it was worth it, for > not much effort. > > AF5SA > > Linux Forever -- Windows sucks... > > On 11/5/18, Fred wrote: >> You know Eddie, I made the mistake of buying windows 10 and loading it a >> couple years ago. Then wiped the disk and put the installation disk in >> the shredder. I use Linux mint, and if I ever get all the radio stuff to >> work on Linux even windows 7 is going away. Just haven't had the time >> to mess with it lately. >> 73 >> Fred >> >> On 11/5/2018 6:09 PM, kd5wdq wrote: >>> Wow, not surprised.... >>> >>> I have a Win 8.1 system and have turned off all updates. >>> It has but one reason to exist, it runs my SNA. >>> >>> Last time I was out for a club meeting I said this: >>> "Win10 is a VIRUS that emulates a Operating System (OS)." >>> >>> (why do you think they were giving it away for free?) >>> >>> Windows is crap, Linux forever... >>> AF5SA >> > ______________________________________________________________ > HCARC mailing list > Home: http://mailman.qth.net/mailman/listinfo/hcarc > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:HCARC at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From owencomps at gmail.com Wed Nov 7 03:41:29 2018 From: owencomps at gmail.com (Ray Owen) Date: Wed, 7 Nov 2018 02:41:29 -0600 Subject: [HCARC] Radio Shack In-Reply-To: <166ecdb195f-1ec4-e2e@webjas-vad026.srv.aolmail.net> References: <166ecdb195f-1ec4-e2e@webjas-vad026.srv.aolmail.net> Message-ID: I could use some help.? First off, the hook.? Fredericksburg Radio Shack, Run by my friend Franky Villnuevea, has relocated to the Llano Highway out past Mini-Mart.? He carries all the fun stuff like PL-259s, and SO-239s.? Here's where I could use a hand.? He's asked me to help him determine what we as HAMs need.? Could yall please send me lists, so I can get these on order, and we have a good LOCAL place to get our stuff? I'm a tight ad old German, but I'd sure rather give my money to someone I know than some jokers I jus talk to on the phone.? We can get anything from RG8X to LMR-400.? And yes, I'll be the sorry sucker ordering, so you know exactly who to chew out when we don't have it on hand. Ray Owen K5WRO From jim.k0mhc at earthlink.net Thu Nov 8 16:44:02 2018 From: jim.k0mhc at earthlink.net (Jim Froemke) Date: Thu, 8 Nov 2018 15:44:02 -0600 Subject: [HCARC] Nov. 1st Rover HCARC Presentation (updated) Message-ID: <000001d477ac$2a80c770$7f825650$@earthlink.net> The updates include rover category clarifications and more examples. You can view the updated presentation at this link: https://tinyurl.com/y9m54829 if you have a pdf viewer installed. With pdf files none of the animations will be visible. You should be able to download a PPSX version at this link: https://tinyurl.com/y8l6os4x Animations should be visible if you have a PPT viewer or Openoffice and play the downloaded presentation. Please let me know if you have problems downloading or viewing either of these presentations on your device. Lastly, please contact me with your rover questions or suggestions. Remember that you're invited to participate in the January 19-20th VHF contest as a new rover or ride-along. Rover "loaner" equipment is available for your use. Thanks for your time and interest. 73, Jim K0MHC/rover Kerrville, TX Jim.k0mhc at earthlink.net -or- K0mhc at arrtl.net From n5baa at hctc.net Wed Nov 21 11:15:15 2018 From: n5baa at hctc.net (Gary Johnson) Date: Wed, 21 Nov 2018 10:15:15 -0600 Subject: [HCARC] Non-reciprocal paths via the ionosphere at HF Message-ID: <4F14C25C7CF64ACA89F341D73F3BDC89@GaryPC> Starr ? excellent article for the Static. Gary J NA3VY From: Ken Nichols Sent: Tuesday, November 20, 2018 10:37 PM To: STXDXCC at groups.io Subject: [STXDXCC] #Contest #DX Non-reciprocal paths via the ionosphere at HF As suggested at the meeting tonight, here?s a posting I put on KARSnews at groups.io earlier today. Actually it probably has more relevance here than on that group. ?????? Here?s an interesting post from a FlexRadio forum. It?s from a discussion about why hams justify the need for a linear amplifier sometimes. The discussion was focused on how the RF path between two stations is different depending on which station you?re at. Take note of the link to a very interesting free book from the government. -Ken- KD3VK ?????? Noni-reciprocal paths via the ionosphere at HF During a discussion on Pedersen rays at a recent CAKE meeting it was claimed these were ?asymmetrical? paths and an explanation was needed. We all know that much of our hobby depends on the ionosphere to return our transmitted signals back to earth and we may tend to think in terms of mirror-like reflections. Nothing could be further from the truth as the ionosphere is an unstable mix of charged particles and gases.It has both regular and irregular behavior. Although the ionosphere was key to commercial world-wide radio communication from around the 1930s the great deal of knowledge accumulated was practical rather than scientific. The science of the Ionospheric began sometime around the 1950s with the invention of atmospheric sounders. Scientific studies were intensified in the 1960s for security reasons when understanding propagation in high northern lattitudes became especially important. Hang on I will answer the question soon HI In 1967, NATO held a conference on Ionospheric communications with a focus of the Arctic and the conference proceedings has a section on HF entitled The difference in levels of signals travelling in opposite directions. The following three statements were selected from that section: 1. Paths between two antennas can be non-reciprocal but this is NOT due to differences in ray path attenuation or phase. On the basis of ray theory these are the same for signals travelling in either direction. 2. The reciprocity or non reciprocity arrises only because of interaction of the upward or downward waves with the antennas at the ends and the earths magnetic field. 3. A reciprocal path is formed between linearly polarized antennas (most amateur antennas) if they are both polarized in, or perpendicular to, the earths magnetic field otherwise the path can be non-reciprocal. The section reached the conclusion that ?most ionospheric paths are non-reciprocal with the result that there can be large instantaneous differences in the levels of signals travelling in opposite directions.? To go beyond that statement and understand the mode and practical implications one needs to look into the phemomena of the ionosphere converting an incoming plane polarized wave into two outgoing circularly polarized waves known as O ordinary and X extraordinary. Ron W6WO See Reference Also https://www.gpo.gov/fdsys/pkg/GOVPUB-C13-fb3928334c2e900ed6a1cc1312e7db64/pdf/GOVPUB-C13-fb3928334c2e900ed6a1cc1312e7db64.pdf Download the NIST Book from the link above The HF Radio Ionosphere Sounders Studies Prove the paths for Gray line DX are asymmetrical On HF and not equal from both Directions especially On Multihop and Sporadic E propagation ! Free Book while it lasts (budget constraints) from the NIST Library Reference Link above !! Hams love free stuff !!! _._,_._,_ -------------------------------------------------------------------------------- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#6577) | Reply To Group | Reply To Sender | Mute This Topic | New Topic Mute #contest | Mute #dx Your Subscription | Contact Group Owner | Unsubscribe [n5baa at hctc.net] _._,_._,_ From kerryk5ks at hughes.net Wed Nov 21 15:53:03 2018 From: kerryk5ks at hughes.net (Kerry) Date: Wed, 21 Nov 2018 14:53:03 -0600 Subject: [HCARC] Non-reciprocal paths via the ionosphere at HF In-Reply-To: <4F14C25C7CF64ACA89F341D73F3BDC89@GaryPC> References: <4F14C25C7CF64ACA89F341D73F3BDC89@GaryPC> Message-ID: <21116bc5-4b8f-8c7f-a099-7918eef041f9@hughes.net> Howdy all, Here are a few additional bits of information relative to this subject. First, the referenced document is "Ionospheric Radio Propagation" by Kenneth Davies.? He was with the Central Radio Propagation Laboratory which used to issue propagation predictions for the US government.? Perhaps some of you remember the HF propagation charts which were issued by CRPL.? Eventually they were able to develop a set of documents which you could use to predict HF propagation between any two points for any sunspot number.? The final step was the software program VOACAP which many amateurs still use.? The original publication date of the book was 1965. The challenge in modeling/predicting/understanding ionospheric propagation is the ionosphere is a plasma embedded in a magnetic field.? The ionosphere is neither homogeneous nor isotropic.? Any propagating electromagnetic (EM) wave can be can be broken down into 2 orthogonal components.? We are all familiar with right and left circular polarization and vertical and horizontal polarization.? These are examples of pairs of orthogonal polarizations.? In the ionosphere, the 2 natural orthogonal polarizations are Ordinary (O) and Extraordinary (X) which are elliptical polarizations.? When an EM waves enters the ionosphere it is resolved into the O and X components.? What makes life interesting is these two components follow different paths through the ionosphere.? as a matter of fact at frequencies near the MUF the X wave may not even be returned to the ground but go into space.? If they both are returned, since they were in the ionosphere for different times due to their different paths the polarization of the EM wave at the distant point may be different than it was when transmitted.? The poplarization change for the 2 directions is in opposite directions.? I believe that is where most of the non-reciprocity comes from. EM waves are not generally reflected as if by a mirror.? The reflection height is called the "virtual Height".? The EM wave never reaches that point but follows a curved path well below that point.? The only exception is sporadic-E where the ionospheric layer is dense and thin. By the way I've never heard a ham try to justify his need for a linear on non-reciprocal propagation.? The reason is he wants to be able to bust pileups!? Most non-reciprocal propagation on the hand bands is caused different power levels and/or different operator abilities on the two ends. If anyone is seriously interested in the whys and wherefores, I suggest "Radio Waves in the Ionosphere - the Mathematical Theory of the Reflection of Radio waves from Stratified Ionised Layers" by K. G. Budden, 1961.? He is British - "ionised" is spelled correctly!? Be prepared - Reading and understanding Budden requires math beyond Calculus. If you have any questions send them along Kerry On 11/21/2018 10:15 AM, Gary Johnson wrote: > Starr ? excellent article for the Static. > Gary J > NA3VY > *From:* Ken Nichols > *Sent:* Tuesday, November 20, 2018 10:37 PM > *To:* STXDXCC at groups.io > *Subject:* [STXDXCC] #Contest #DX Non-reciprocal paths via the > ionosphere at HF > As suggested at the meeting tonight, here?s a posting I put on > KARSnews at groups.io earlier today.?? Actually it probably has more > relevance here than on that group. > ?????? > > Here?s an interesting post from a FlexRadio forum.? It?s from a > discussion about why hams justify the need for a linear amplifier > sometimes. The discussion was focused on how the RF path between > two stations is different depending on which station you?re at. > Take note of the link to a very interesting free book from the > government. > -Ken-? KD3VK > ?????? > Noni-reciprocal paths via the ionosphere at HF > > During a discussion on Pedersen rays at a recent CAKE meeting it > was claimed these were ?asymmetrical? paths and an explanation was > needed. > > We all know that much of our hobby depends on the ionosphere to > return our transmitted signals back to earth and we may tend to > think in terms of mirror-like reflections. Nothing could be > further from the truth as the ionosphere is an unstable mix of > charged particles and gases.It has both regular and irregular > behavior. > > Although the ionosphere was key to commercial world-wide radio > communication from around the 1930s the great deal of knowledge > accumulated was practical rather than scientific. The science of > the Ionospheric began sometime around the 1950s with the invention > of atmospheric sounders. Scientific studies were intensified in > the 1960s for security reasons when understanding propagation in > high northern lattitudes became especially important. Hang on I > will answer the question soon HI > > In 1967, NATO held a conference on Ionospheric communications with > a focus of the Arctic and the conference proceedings has a section > on HF entitled The difference in levels of signals travelling in > opposite directions. The following three statements were selected > from that section: > > 1. Paths between two antennas can be non-reciprocal but this is > NOT due to differences in ray path attenuation or phase. On the > basis of ray theory these are the same for signals travelling in > either direction. > > 2. The reciprocity or non reciprocity arrises only because of > interaction of the upward or downward waves with the antennas at > the ends and the earths magnetic field. > > 3. A reciprocal path is formed between linearly polarized antennas > (most amateur antennas) if they are both polarized in, or > perpendicular to, the earths magnetic field otherwise the path can > be non-reciprocal. > The section reached the conclusion that ?most ionospheric paths > are non-reciprocal with the result that there can be large > instantaneous differences in the levels of signals travelling in > opposite directions.? > To go beyond that statement and understand the mode and practical > implications one needs to look into the phemomena of the > ionosphere converting an incoming plane polarized wave into two > outgoing circularly polarized waves known as O ordinary and X > extraordinary. > > Ron W6WO > > See Reference Also > > https://www.gpo.gov/fdsys/pkg/GOVPUB-C13-fb3928334c2e900ed6a1cc1312e7db64/pdf/GOVPUB-C13-fb3928334c2e900ed6a1cc1312e7db64.pdf > > Download the NIST Book from the link above > The HF Radio Ionosphere Sounders Studies > > Prove the paths for Gray line DX are asymmetrical > > On HF and not equal from both Directions especially > On Multihop and Sporadic E propagation ! > > Free Book while it lasts (budget constraints) from > the NIST Library Reference Link above !! > > Hams love free stuff !!! > _._,_._,_ > ------------------------------------------------------------------------ > Groups.io Links: > > You receive all messages sent to this group. > > View/Reply Online (#6577) | > Reply To Group | Reply To Sender | Mute This Topic > | New Topic > > Mute #contest | > Mute #dx > Your Subscription | > Contact Group Owner | Unsubscribe > > [n5baa at hctc.net] > > _._,_._,_ From n5baa at hctc.net Sat Nov 24 12:29:15 2018 From: n5baa at hctc.net (Gary Johnson) Date: Sat, 24 Nov 2018 11:29:15 -0600 Subject: [HCARC] Radio Trivia Message-ID: <92330385916A47208FFFD28CE51726E5@GaryPC> Anyone know what the green and red areas that are on old radio room clocks are for?? They mark 3 minute periods after each quarter hour that were designated Quiet Periods for listening for SOS signals. 73, Gary J NA3VY From bucket at janeandjohn.org Sat Nov 24 13:39:13 2018 From: bucket at janeandjohn.org (John Canfield) Date: Sat, 24 Nov 2018 12:39:13 -0600 Subject: [HCARC] Radio Trivia In-Reply-To: <92330385916A47208FFFD28CE51726E5@GaryPC> References: <92330385916A47208FFFD28CE51726E5@GaryPC> Message-ID: <18f5316d-f7c6-d915-a99e-5bc247cbc5c4@janeandjohn.org> Did not know that Gary! John WB5THT On 11/24/2018 11:29 AM, Gary Johnson wrote: > Anyone know what the green and red areas that are on old radio room clocks are for?? They mark 3 minute periods after each quarter hour that were designated Quiet Periods for listening for SOS signals. > > 73, > > Gary J > NA3VY > ______________________________________________________________ > HCARC mailing list > Home: http://mailman.qth.net/mailman/listinfo/hcarc > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:HCARC at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From galeheise at windstream.net Sat Nov 24 15:25:26 2018 From: galeheise at windstream.net (Gale Heise) Date: Sat, 24 Nov 2018 14:25:26 -0600 Subject: [HCARC] Free Rack Mount Cabinet Message-ID: <59.B3.05290.6B3B9FB5@smtp01.aqua.bos.sync.lan> To All- I have a rack mount metal cabinet with overall dimensions of 21 1/8? wide (19? rack width) x 34? deep x 40? high mounted on a set of coasters. If you are interested in traveling to my QTH to pick it up give me a call at 830-896-9593. This cabinet was previously utilized to house a 2 meter repeater, controller and duplexers. If you would like some photos, send me an email and I can get them to you. Gale KM4DR From galeheise at windstream.net Wed Nov 28 10:24:11 2018 From: galeheise at windstream.net (Gale Heise) Date: Wed, 28 Nov 2018 09:24:11 -0600 Subject: [HCARC] Tubes to Sell on eBay Message-ID: <08.8D.17009.B13BEFB5@smtp03.aqua.bos.sync.lan> To All- I have tested about 4,700 tubes and over 2,500 are okay to sell. Of the 2,500, I?ve sold over 1,000 on eBay leaving around 1,500 tubes to sell in inventory. In addition, there are also several hundred left that have not been tested. Curious if anyone is interested in taking over the inventory to sell them. Let me know if you are. 830-896-9593 or return email is fine. Gale KM4DR From tower2 at stx.rr.com Thu Nov 29 14:30:25 2018 From: tower2 at stx.rr.com (Harvey N. Vordenbaum) Date: Thu, 29 Nov 2018 13:30:25 -0600 Subject: [HCARC] Battery Analyzer Message-ID: <004501d48819$fc134bf0$f439e3d0$@rr.com> Did I loan my West Mountain Battery Analyzer to someone? Or did I make a mistake and leave it at the Red Cross station when I tested the battery there? (Where it might have been Excessed by now) Harvey K5HV From qltfnish at omniglobal.net Thu Nov 29 19:21:44 2018 From: qltfnish at omniglobal.net (Gary J - N5BAA) Date: Thu, 29 Nov 2018 18:21:44 -0600 Subject: [HCARC] Battery Analyzer In-Reply-To: <004501d48819$fc134bf0$f439e3d0$@rr.com> References: <004501d48819$fc134bf0$f439e3d0$@rr.com> Message-ID: <7014C84C659D419B947FB6E892F49634@GaryPC> I don?t remember having one to sell. To my knowledge we only sold "inventoried items". BUT, Of all the things I've lost, I miss my memory the most. 73, Gary J NA3VY -----Original Message----- From: Harvey N. Vordenbaum Sent: Thursday, November 29, 2018 1:30 PM To: hcarc at mailman.qth.net Subject: [HCARC] Battery Analyzer Did I loan my West Mountain Battery Analyzer to someone? Or did I make a mistake and leave it at the Red Cross station when I tested the battery there? (Where it might have been Excessed by now) Harvey K5HV ______________________________________________________________ HCARC mailing list Home: http://mailman.qth.net/mailman/listinfo/hcarc Help: http://mailman.qth.net/mmfaq.htm Post: mailto:HCARC at mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html