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In no. 4, LA1AEA, Alfred, has written about how he made his own. It helped him try the 6 meter band this summer. Given his location in the very far North of Norway (Finnmark), I'm impressed by contacts that he had all the way to Greece, 3500 km away.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nHe writes: \"LA3ZA Sverre Holm wrote an interesting article in no 3, 2019 with title \"A Moxon summer antenna for 6 meter.\" I was inspired to try myself with some simple materials that I had available. For a long time I have considered the 6 m band to be unusable from here way up North. But this shows how wrong one can be.\"\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiScal6W7fN2f5UwjJL31tk7JHBW5I9FBW3GxTQhAXtXnesEOmWwYM9-x0XlRYpxoph8rj68OARgNeP5qhHqIPgRVuTGzxWRUhyphenhyphengT13xTrkIi7eaPM6CkAhTqxL-henyJVCeoSdZLgX-AM\/s1600\/2019-aug-LA1AEA-Moxon.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" data-original-height=\"1233\" data-original-width=\"1600\" height=\"306\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiScal6W7fN2f5UwjJL31tk7JHBW5I9FBW3GxTQhAXtXnesEOmWwYM9-x0XlRYpxoph8rj68OARgNeP5qhHqIPgRVuTGzxWRUhyphenhyphengT13xTrkIi7eaPM6CkAhTqxL-henyJVCeoSdZLgX-AM\/s400\/2019-aug-LA1AEA-Moxon.jpg\" width=\"400\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: left;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: left;\"\u003E\nThis \u003Ca href=\"https:\/\/la3za.blogspot.com\/2019\/10\/6-m-antenna-inspiration.html\"\u003Eblog post\u003C\/a\u003E first appeared on the LA3ZA blog.\u003C\/div\u003E\n\u003Cbr \/\u003E"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/la3za.blogspot.com\/feeds\/3339154068145511415\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2019\/10\/6-m-antenna-inspiration.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/3339154068145511415"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/3339154068145511415"},{"rel":"alternate","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2019\/10\/6-m-antenna-inspiration.html","title":"6 m Antenna Inspiration"}],"author":[{"name":{"$t":"Sverre Holm"},"uri":{"$t":"http:\/\/www.blogger.com\/profile\/08306221557326542499"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"26","height":"32","src":"\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEirIUQ4__tBn8iuiGzcRlJEOroeUKkNCZ2mN2DM3rs_2pPUFGIs7a2EtYWIiOikqsFchk8w4XaHx_XyS1g_-i8Kmu46zrppNaF1Xeh-omtKQqjq9tEzjhEobips8DmSvw\/s1600\/sverreholm20.jpg"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiScal6W7fN2f5UwjJL31tk7JHBW5I9FBW3GxTQhAXtXnesEOmWwYM9-x0XlRYpxoph8rj68OARgNeP5qhHqIPgRVuTGzxWRUhyphenhyphengT13xTrkIi7eaPM6CkAhTqxL-henyJVCeoSdZLgX-AM\/s72-c\/2019-aug-LA1AEA-Moxon.jpg","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-2554001380039969960.post-2429338023351559422"},"published":{"$t":"2019-05-13T18:24:00.002+02:00"},"updated":{"$t":"2019-08-30T22:23:21.628+02:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"10 MHz"},{"scheme":"http://www.blogger.com/atom/ns#","term":"GPS"},{"scheme":"http://www.blogger.com/atom/ns#","term":"homebrew"}],"title":{"type":"text","$t":"More spurs than I had hoped for"},"content":{"type":"html","$t":"\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhQTzSR4bULbfMrFB6nq_ZlI_GTu9l8RrxIlYj7392erUdeaguOlLjySA__MoYJNVaKHBL5dEJ-wannHp64q4mWGfLq_hs0TRqSrRrwFjAzHGos5DJe5XUmzijswWIBomEseCBVuyhujB8\/s1600\/10MHz-sidebands-10MHzRef.png\" imageanchor=\"1\" style=\"clear: right; float: right; margin-bottom: 1em; margin-left: 1em;\"\u003E\u003Cimg border=\"0\" data-original-height=\"272\" data-original-width=\"480\" height=\"180\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhQTzSR4bULbfMrFB6nq_ZlI_GTu9l8RrxIlYj7392erUdeaguOlLjySA__MoYJNVaKHBL5dEJ-wannHp64q4mWGfLq_hs0TRqSrRrwFjAzHGos5DJe5XUmzijswWIBomEseCBVuyhujB8\/s320\/10MHz-sidebands-10MHzRef.png\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\nMy \u003Ca href=\"http:\/\/la3za.blogspot.com\/2015\/10\/just-good-enough-10-mhz-reference.html\" target=\"_blank\"\u003EJust good enough 10 MHz reference\u003C\/a\u003E\u0026nbsp;based on the direct output of a Neo-7 GPS module, described in detail before on this blog, is good in keeping long-term frequency stability. Short-term stability and phase noise is as expected not so good. When connected to the reference input of my Elecraft K3 and listening to an outdoor antenna, I get quite a substantial amount of spurs around 10 MHz radiating from the GPS module. But since the K3 itself does averaging over a second or so, this is fine from the point of view of keeping accurate frequency.\u003Cbr \/\u003E\n\u003Ca name='more'\u003E\u003C\/a\u003E\u003Cbr \/\u003E\nThe first plot, obtained from the Elecraft P3 Panadapter, shows the spurs. The strongest sidebands occur at 10 MHz +\/- multiples of 100 Hz. There isn't much one can do about that. But since the amateur band starts at 10.1 MHz, the level of the spurs are enough reduced so it is OK.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhdfZwe4yY3UBHH-_YAWQebisTR8l0xCrDqv80LJBuyy6Nqmzs-fwar3d0gFnvv5xgPkJXR1nz1mCcgRa_N2ZBhDFSpX-GqdtoHdTxreJHVLWmefybnXCu4Pm8cx-Xripi_sQbeUccqHR4\/s1600\/14MHz-sidebands-10MHzRef.png\" imageanchor=\"1\" style=\"clear: right; float: right; margin-bottom: 1em; margin-left: 1em;\"\u003E\u003Cimg border=\"0\" data-original-height=\"272\" data-original-width=\"480\" height=\"180\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhdfZwe4yY3UBHH-_YAWQebisTR8l0xCrDqv80LJBuyy6Nqmzs-fwar3d0gFnvv5xgPkJXR1nz1mCcgRa_N2ZBhDFSpX-GqdtoHdTxreJHVLWmefybnXCu4Pm8cx-Xripi_sQbeUccqHR4\/s320\/14MHz-sidebands-10MHzRef.png\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\nIt is worse with what the next plot shows, at a center frequency of 14 MHz. At this frequency there is no carrier, only sidebands spaced at what seems to be 240 Hz. This creates noise right at the beginning of the lower part of the 20 m band, and means that the reference cannot be used when operating CW on 20 m.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nI'm sure this phenomenon can be understood and interpreted in light of the internal 48 MHz clock of the Neo-7 GPS and its mixing of divisions by integer numbers in order to get 10 MHz on average.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjUUVB0UjGOUjVQvwgN66ryDqHFW7CNPyceh-xlv2qNrsVDvTc3bZZ1igUFBd-3sqcmXSyCkUOEq1U1iK06cWfC400dwX1Hqj2p92BTzerevtDU5P425fIzk_9TP35NHaxnVkeRvpZd2jY\/s1600\/28MHz-sidebands-10MHzRef.png\" imageanchor=\"1\" style=\"clear: right; float: right; margin-bottom: 1em; margin-left: 1em;\"\u003E\u003Cimg border=\"0\" data-original-height=\"272\" data-original-width=\"480\" height=\"180\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjUUVB0UjGOUjVQvwgN66ryDqHFW7CNPyceh-xlv2qNrsVDvTc3bZZ1igUFBd-3sqcmXSyCkUOEq1U1iK06cWfC400dwX1Hqj2p92BTzerevtDU5P425fIzk_9TP35NHaxnVkeRvpZd2jY\/s320\/28MHz-sidebands-10MHzRef.png\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\nSomething similar occurs at twice that frequency also, at 28 MHz, where sidebands are spaced 220 Hz apart, making the lower part of the 10 m band full of noise also when using the 10 MHz reference.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nSo I guess it is time to move on to something better.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nThis blog post first appeared on the \u003Ca href=\"http:\/\/la3za.blogspot.com\/\" target=\"_blank\"\u003ELA3ZA Radio \u0026amp; Electronics Blog\u003C\/a\u003E."},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/la3za.blogspot.com\/feeds\/2429338023351559422\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2019\/05\/more-spurs-than-i-had-hoped-for.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/2429338023351559422"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/2429338023351559422"},{"rel":"alternate","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2019\/05\/more-spurs-than-i-had-hoped-for.html","title":"More spurs than I had hoped for"}],"author":[{"name":{"$t":"Sverre Holm"},"uri":{"$t":"http:\/\/www.blogger.com\/profile\/08306221557326542499"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"26","height":"32","src":"\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEirIUQ4__tBn8iuiGzcRlJEOroeUKkNCZ2mN2DM3rs_2pPUFGIs7a2EtYWIiOikqsFchk8w4XaHx_XyS1g_-i8Kmu46zrppNaF1Xeh-omtKQqjq9tEzjhEobips8DmSvw\/s1600\/sverreholm20.jpg"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhQTzSR4bULbfMrFB6nq_ZlI_GTu9l8RrxIlYj7392erUdeaguOlLjySA__MoYJNVaKHBL5dEJ-wannHp64q4mWGfLq_hs0TRqSrRrwFjAzHGos5DJe5XUmzijswWIBomEseCBVuyhujB8\/s72-c\/10MHz-sidebands-10MHzRef.png","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-2554001380039969960.post-5853893280182100754"},"published":{"$t":"2018-04-12T23:31:00.002+02:00"},"updated":{"$t":"2020-09-07T02:06:18.192+02:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"ebay"},{"scheme":"http://www.blogger.com/atom/ns#","term":"homebrew"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Ultimate 3"},{"scheme":"http://www.blogger.com/atom/ns#","term":"WSPR"}],"title":{"type":"text","$t":"Power regulator works as polarity protection"},"content":{"type":"html","$t":"\u003Ctable cellpadding=\"0\" cellspacing=\"0\" class=\"tr-caption-container\" style=\"float: right; margin-left: 1em; text-align: right;\"\u003E\u003Ctbody\u003E\n\u003Ctr\u003E\u003Ctd style=\"text-align: center;\"\u003E\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgcO3nx_nSO2tOmHFvjq7m-glxtavF7LTI5B_Rvrh5y5WmSywgDZ7JyuW1VqFf9I5XF2IunFJCClpbp9cbOOXsR-lYNCUnsSC2mNc4FO9k8_dxetO_MfviGcZoq38u2USSVUeRP9kgDEwQ\/s1600\/LM2596.jpg\" style=\"clear: right; margin-bottom: 1em; margin-left: auto; margin-right: auto;\"\u003E\u003Cimg border=\"0\" data-original-height=\"1200\" data-original-width=\"1600\" height=\"240\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgcO3nx_nSO2tOmHFvjq7m-glxtavF7LTI5B_Rvrh5y5WmSywgDZ7JyuW1VqFf9I5XF2IunFJCClpbp9cbOOXsR-lYNCUnsSC2mNc4FO9k8_dxetO_MfviGcZoq38u2USSVUeRP9kgDEwQ\/s320\/LM2596.jpg\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003Ctr\u003E\u003Ctd class=\"tr-caption\" style=\"text-align: center;\"\u003EStep-down converter based on LM2596. Note the damaged chip\u003C\/td\u003E\u003C\/tr\u003E\n\u003C\/tbody\u003E\u003C\/table\u003E\nOk, now I've done the test. My \u003Ca href=\"https:\/\/www.qrp-labs.com\/ultimate3\/u3s.html\" target=\"_blank\"\u003EQRPLabs U3S\u003C\/a\u003E runs off a 12 Volt power supply. There are two step-down converters, one for 5 Volts for the processor and another adjustable one for the power amplifier, if one can call 0.2-0.5 Watts a power amplifier. See picture of these voltage converters \u003Ca href=\"http:\/\/la3za.blogspot.no\/2017\/02\/comparing-two-antennas-with-wspr.html\" target=\"_blank\"\u003Ein this post\u003C\/a\u003E.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nI happened to make a new cable for 12 Volts which had the polarities inverted - and puff - there was a noise and absolutely no response from the U3S. I feared that I had blown the entire circuit. As my power amplifier was turned off, only the 5 Volts supply was affected and upon inspection I found that the voltage converter had a destroyed chip.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nSince these step-down converter modules are so cheap on EBay, I had a spare. Luckily for me, the U3S worked as it should after the replacement. So the LM2596 can take a reversed polarity and sacrifices itself in order to protect the rest of the electronics. Nice!\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nThis post first appeared on the \u003Ca href=\"http:\/\/la3za.blogspot.no\/\"\u003ELA3ZA Radio \u0026amp; Electronics blog\u003C\/a\u003E."},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/la3za.blogspot.com\/feeds\/5853893280182100754\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2018\/04\/power-regulator-works-as-polarity.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/5853893280182100754"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/5853893280182100754"},{"rel":"alternate","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2018\/04\/power-regulator-works-as-polarity.html","title":"Power regulator works as polarity protection"}],"author":[{"name":{"$t":"Sverre Holm"},"uri":{"$t":"http:\/\/www.blogger.com\/profile\/08306221557326542499"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"26","height":"32","src":"\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEirIUQ4__tBn8iuiGzcRlJEOroeUKkNCZ2mN2DM3rs_2pPUFGIs7a2EtYWIiOikqsFchk8w4XaHx_XyS1g_-i8Kmu46zrppNaF1Xeh-omtKQqjq9tEzjhEobips8DmSvw\/s1600\/sverreholm20.jpg"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgcO3nx_nSO2tOmHFvjq7m-glxtavF7LTI5B_Rvrh5y5WmSywgDZ7JyuW1VqFf9I5XF2IunFJCClpbp9cbOOXsR-lYNCUnsSC2mNc4FO9k8_dxetO_MfviGcZoq38u2USSVUeRP9kgDEwQ\/s72-c\/LM2596.jpg","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-2554001380039969960.post-5537595166877768332"},"published":{"$t":"2016-06-16T19:52:00.002+02:00"},"updated":{"$t":"2017-02-26T21:43:05.802+01:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"ebay"},{"scheme":"http://www.blogger.com/atom/ns#","term":"homebrew"},{"scheme":"http://www.blogger.com/atom/ns#","term":"power supply"}],"title":{"type":"text","$t":"DIY Powerpole voltage and current meters "},"content":{"type":"html","$t":"\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgMT0BCy9ILzsZimPcjbNhYrcCyeCJQAq_AXGsbLLnNT-pTIZXHC9c_f4gR2Ojy5XES3w32os8Fhd_Fuy1UPMoa1XLUj6ppZdlR-VqDdB0y1t3E7q8QEb_OjwP8-mWADRQ4AAvpppD8TEg\/s1600\/VoltAmp.JPG\" imageanchor=\"1\" style=\"clear: right; float: right; margin-bottom: 1em; margin-left: 1em;\"\u003E\u003Cimg border=\"0\" height=\"240\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgMT0BCy9ILzsZimPcjbNhYrcCyeCJQAq_AXGsbLLnNT-pTIZXHC9c_f4gR2Ojy5XES3w32os8Fhd_Fuy1UPMoa1XLUj6ppZdlR-VqDdB0y1t3E7q8QEb_OjwP8-mWADRQ4AAvpppD8TEg\/s320\/VoltAmp.JPG\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\nPowerpole voltage and current monitoring is quite nice to have. One can buy commercial meters, but due to the availability of nice and cheap modules, it is very easy to make them oneself.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nTo the right you'll see my combined voltage and current meter as well as my volt-meter on top of the power supply.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nBoth of the modules have been bought on Ebay:\u003Cbr \/\u003E\n\u003Cul\u003E\n\u003Cli\u003EMiniature 0-30 V DC LED 2 wire Digital voltmeter (\u003Ca href=\"http:\/\/www.ebay.com\/itm\/371333527599\" target=\"_blank\"\u003E371333527599\u003C\/a\u003E) where the display is 22 by 10 mm. Cost slightly more than $1\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cul\u003E\n\u003Cli\u003E0-100 V, 0-10 A Dual Voltmeter Ammeter (\u003Ca href=\"http:\/\/www.ebay.com\/itm\/262455987311\" target=\"_blank\"\u003E262455987311)\u003C\/a\u003E costing less than $3. The module size is 48 x 29 x 26 mm and the letters are 7 mm tall just like the miniature voltage display.\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiqbJpRraBiMkFgrUk7B1JJSC_OL-FZ6RSmOfE6i7H6Kb4gF0LLiuEih2O5nXjzosC-l8qh5EqTEGIo5QvF5iXTVBwCaHOto-7Ky88AMjRdXfDmkxBmM2hqtAn2wF2imU8sBZtUGeKvTGE\/s1600\/VoltAmpeWiring.jpg\" imageanchor=\"1\" style=\"clear: right; float: right; margin-bottom: 1em; margin-left: 1em;\"\u003E\u003Cimg border=\"0\" height=\"179\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiqbJpRraBiMkFgrUk7B1JJSC_OL-FZ6RSmOfE6i7H6Kb4gF0LLiuEih2O5nXjzosC-l8qh5EqTEGIo5QvF5iXTVBwCaHOto-7Ky88AMjRdXfDmkxBmM2hqtAn2wF2imU8sBZtUGeKvTGE\/s320\/VoltAmpeWiring.jpg\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv\u003E\nThe wires to the voltmeter are connected directly to Powerpole connectors as shown in the second figure (upper right). Then the voltmeter itself is enclosed in transparent shring-wrap tubing of diameter approximately 20 mm like the one you also can buy on Ebay (\u003Ca href=\"http:\/\/www.ebay.com\/itm\/252004328030\" target=\"_blank\"\u003E252004328030\u003C\/a\u003E).\u003C\/div\u003E\n\u003Cdiv\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv\u003E\nThe voltage-current meter is a little more complex to connect. First the volt meter has a power lead (4-30 V) and a measurement lead (0-100 V) which are connected together as I will only be using it for 12 Volts. The current measurement loop is between the negative, black, Powerpole connectors. The positive, red, Powerpole connectors are wired together.\u003C\/div\u003E\n\u003Cdiv\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv\u003E\nI hope this can inspire others to make something similar. And if you do, then please let me know in the comments field!\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cul\u003E\n\u003Cli\u003ERelated post: \"\u003Ca href=\"http:\/\/la3za.blogspot.no\/2014\/08\/new-gadget-measures-negative-resistance.html\" target=\"_blank\"\u003ENew gadget measures negative resistance\u003C\/a\u003E\"\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv\u003E\nThe post \"\u003Ca href=\"http:\/\/la3za.blogspot.no\/2016\/06\/diy-powerpole-voltage-and-current-meters.html\" target=\"_blank\"\u003EDIY Powerpole voltage and current\u0026nbsp;meters\u003C\/a\u003E\" first appeared on the \u003Ca href=\"http:\/\/la3za.blogspot.no\/\" target=\"_blank\"\u003ELA3ZA Radio \u0026amp; Electronics\u003C\/a\u003E page.\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/la3za.blogspot.com\/feeds\/5537595166877768332\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2016\/06\/diy-powerpole-voltage-and-current-meters.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/5537595166877768332"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/5537595166877768332"},{"rel":"alternate","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2016\/06\/diy-powerpole-voltage-and-current-meters.html","title":"DIY Powerpole voltage and current meters "}],"author":[{"name":{"$t":"Sverre Holm"},"uri":{"$t":"http:\/\/www.blogger.com\/profile\/08306221557326542499"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"26","height":"32","src":"\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEirIUQ4__tBn8iuiGzcRlJEOroeUKkNCZ2mN2DM3rs_2pPUFGIs7a2EtYWIiOikqsFchk8w4XaHx_XyS1g_-i8Kmu46zrppNaF1Xeh-omtKQqjq9tEzjhEobips8DmSvw\/s1600\/sverreholm20.jpg"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgMT0BCy9ILzsZimPcjbNhYrcCyeCJQAq_AXGsbLLnNT-pTIZXHC9c_f4gR2Ojy5XES3w32os8Fhd_Fuy1UPMoa1XLUj6ppZdlR-VqDdB0y1t3E7q8QEb_OjwP8-mWADRQ4AAvpppD8TEg\/s72-c\/VoltAmp.JPG","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-2554001380039969960.post-688616109571253946"},"published":{"$t":"2016-04-11T11:06:00.001+02:00"},"updated":{"$t":"2021-01-28T11:37:59.732+01:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"10 MHz"},{"scheme":"http://www.blogger.com/atom/ns#","term":"GPS"},{"scheme":"http://www.blogger.com/atom/ns#","term":"homebrew"},{"scheme":"http://www.blogger.com/atom/ns#","term":"K3"}],"title":{"type":"text","$t":"Improved GPS reception with a ground plane"},"content":{"type":"html","$t":"\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgVa9XL04cCM5P47aikmvzza-T3zOeylTtFyk14Jfqe6XjzHb1NOVwwVvPYTS5KXFU39Q88ud1ozC2m6ghaqkvxOW4Z0SaWFJRzdm_UapVbOqDdXLnswI0V7PUAHvZAgSrTUk5wmPrv2_g\/s1600\/GPS-gndPlane-85x65mm.JPG\" imageanchor=\"1\" style=\"clear: right; float: right; margin-bottom: 1em; margin-left: 1em;\"\u003E\u003Cimg border=\"0\" height=\"215\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgVa9XL04cCM5P47aikmvzza-T3zOeylTtFyk14Jfqe6XjzHb1NOVwwVvPYTS5KXFU39Q88ud1ozC2m6ghaqkvxOW4Z0SaWFJRzdm_UapVbOqDdXLnswI0V7PUAHvZAgSrTUk5wmPrv2_g\/s320\/GPS-gndPlane-85x65mm.JPG\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\nMy poor-man's 10 MHz reference based on the Ublox Neo-7M GPS module didn't always receive GPS satellites. Since I rely on reception indoors, conditions were sometimes too marginal to lock the oscillator output to 10 MHz. Inspired by the \u003Ca href=\"http:\/\/qrp-labs.com\/qlg1.html\" target=\"_blank\"\u003EQRPlabs GPS module\u003C\/a\u003E of Hans Summers (G0UPL) with its large 6 x 6 cm PCB groundplane, I therefore decided to do something similar.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nThe first picture shows the unit with the 8.5 x 6.5 cm single-sided PCB ground plane attached with double-sided tape. It definitely helped make indoors reception in my shack much more reliable. In addition to the improved conditions for the patch antenna, it probably helps too that the antenna now is shielded from the digital circuitry of the GPS module, the 10 MHz pulse shaper, and the USB interface. I also added a small LED to the right so that I could see from the outside whether the GPS locks properly.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nThe second picture shows the interior prior to adding the ground plane.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjtXCBFPlhqAWJwxY_uyZXziMmIjYSVnhNbONQQfTRUs2IzGH8ghd3N5T6EKHF_XTlSiJl5_4Oab-oxM9fn3uFLGY2ly4yhyphenhyphenLSBzitLrlUimMblrSUHn68jIOtnF5y9ZhVFdhcAOnVhysg\/s1600\/SNV84024.JPG\" imageanchor=\"1\" style=\"clear: right; float: right; margin-bottom: 1em; margin-left: 1em;\"\u003E\u003Cimg border=\"0\" height=\"240\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjtXCBFPlhqAWJwxY_uyZXziMmIjYSVnhNbONQQfTRUs2IzGH8ghd3N5T6EKHF_XTlSiJl5_4Oab-oxM9fn3uFLGY2ly4yhyphenhyphenLSBzitLrlUimMblrSUHn68jIOtnF5y9ZhVFdhcAOnVhysg\/s320\/SNV84024.JPG\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\nThis post is a continuation of these other posts about the 10 MHz reference:\u003Cbr \/\u003E\n\u003Col\u003E\n\u003Cli\u003E\u003Ca href=\"http:\/\/la3za.blogspot.no\/2015\/10\/just-good-enough-10-mhz-reference.html\" target=\"_blank\"\u003EJust good enough 10 MHz reference\u003C\/a\u003E (3 Oct 2015)\u003C\/li\u003E\n\u003Cli\u003E\u003Ca href=\"http:\/\/la3za.blogspot.no\/2015\/10\/better-with-sma.html\" target=\"_blank\"\u003EBetter with SMA\u003C\/a\u003E (15 Oct 2015)\u003C\/li\u003E\n\u003Cli\u003E\u003Ca href=\"http:\/\/la3za.blogspot.no\/2015\/11\/my-just-good-enough-10-mhz-gps.html\" target=\"_blank\"\u003ECuring amnesia in the 10 MHz GPS reference \u003C\/a\u003E(19 Nov 2015)\u003C\/li\u003E\n\u003C\/ol\u003E\n\u003Cdiv\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv\u003E\nThe post \u003Ca href=\"http:\/\/la3za.blogspot.no\/2016\/04\/improved-gps-reception-with-ground-plane.html\" target=\"_blank\"\u003EImproved GPS reception with a ground plane\u003C\/a\u003E first appeared on the \u003Ca href=\"http:\/\/la3za.blogspot.no\/\" target=\"_blank\"\u003ELA3ZA Radio \u0026amp; Electronics\u003C\/a\u003E page.\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/la3za.blogspot.com\/feeds\/688616109571253946\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2016\/04\/improved-gps-reception-with-ground-plane.html#comment-form","title":"3 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/688616109571253946"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/2554001380039969960\/posts\/default\/688616109571253946"},{"rel":"alternate","type":"text/html","href":"https:\/\/la3za.blogspot.com\/2016\/04\/improved-gps-reception-with-ground-plane.html","title":"Improved GPS reception with a ground plane"}],"author":[{"name":{"$t":"Sverre Holm"},"uri":{"$t":"http:\/\/www.blogger.com\/profile\/08306221557326542499"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"26","height":"32","src":"\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEirIUQ4__tBn8iuiGzcRlJEOroeUKkNCZ2mN2DM3rs_2pPUFGIs7a2EtYWIiOikqsFchk8w4XaHx_XyS1g_-i8Kmu46zrppNaF1Xeh-omtKQqjq9tEzjhEobips8DmSvw\/s1600\/sverreholm20.jpg"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgVa9XL04cCM5P47aikmvzza-T3zOeylTtFyk14Jfqe6XjzHb1NOVwwVvPYTS5KXFU39Q88ud1ozC2m6ghaqkvxOW4Z0SaWFJRzdm_UapVbOqDdXLnswI0V7PUAHvZAgSrTUk5wmPrv2_g\/s72-c\/GPS-gndPlane-85x65mm.JPG","height":"72","width":"72"},"thr$total":{"$t":"3"}}]}});