{"id":3300,"date":"2019-04-01T21:05:25","date_gmt":"2019-04-01T20:05:25","guid":{"rendered":"http:\/\/www.dj5ar.de\/?p=3300"},"modified":"2020-01-17T08:47:11","modified_gmt":"2020-01-17T07:47:11","slug":"playing-with-the-bird","status":"publish","type":"post","link":"https:\/\/dj5ar.de\/?p=3300","title":{"rendered":"Playing with the bird"},"content":{"rendered":"\n

April 1st, 2019<\/strong><\/p>\n\n\n\n

As soon, as the narrow band transponder was opened in February, I had my first QSOs via QO-100. Using an MKU LNC 10 in a 80 cm offset dish and my 3 m mesh dish for transmitting, made the first steps very (too) easy.<\/p>\n\n\n\n

\"\"
ADALM Pluto and 2 LNAs mounted at a W2IMU feedhorn<\/figcaption><\/figure>\n\n\n\n

In the meantime I mentioned, some hams from the Netherlands, experimenting with ADALM-Pluto SDRs, had very good results. So I got one too and was amazed of variety of possibilities it offers. So I heard my first beacon on 9 cm and it was easy to produce a signal on 13 cm. Recently I got two broadband LNAs (I will call them “A” and “B”) from China and was curious to see how these can be used as power amplifiers too. <\/p>\n\n\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t
Power Source<\/th>Power in mW<\/th>\n<\/tr>\n<\/thead>\n
Pluto<\/td> 3<\/td>\n<\/tr>\n
Pluto + LNA \"A\"<\/td> 22<\/td>\n<\/tr>\n
Pluto + LNA \"B\"<\/td> 30<\/td>\n<\/tr>\n
Pluto +LNA \"A\" + LNA \"B\"<\/td>120<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
\"\"<\/figure>\n\n\n\n

After some power measuring I connected the stuff to a W2IMU feedhorn, mounted on a tripod. No problem at all to find my signal on the NB transponder of QO-100. The estimated EIRP is about 2.4 W and results in a signalstrength of 12 dB.<\/p>\n\n\n\n

<\/p>\n\n\n\n

Addendum: April 10th, 2019<\/strong><\/p>\n\n\n\n

3 mW are enough!<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

At least I mounted a DJ7GP patch feed with the bare naked Pluto in the focus of my 3 m mesh dish. the 3 mW were enough to produce a solid signal on the NB transponder. In this case I have 6 W EIRP to get 16 dB signal.<\/p>\n","protected":false},"excerpt":{"rendered":"

April 1st, 2019 As soon, as the narrow band transponder was opened in February, I had my first QSOs via QO-100. Using an MKU LNC 10 in a 80 cm […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[214,190],"tags":[],"class_list":["post-3300","post","type-post","status-publish","format-standard","hentry","category-eshail-2","category-satellites"],"_links":{"self":[{"href":"https:\/\/dj5ar.de\/index.php?rest_route=\/wp\/v2\/posts\/3300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dj5ar.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dj5ar.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dj5ar.de\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/dj5ar.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3300"}],"version-history":[{"count":10,"href":"https:\/\/dj5ar.de\/index.php?rest_route=\/wp\/v2\/posts\/3300\/revisions"}],"predecessor-version":[{"id":3504,"href":"https:\/\/dj5ar.de\/index.php?rest_route=\/wp\/v2\/posts\/3300\/revisions\/3504"}],"wp:attachment":[{"href":"https:\/\/dj5ar.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dj5ar.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dj5ar.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}