{"id":65,"date":"2015-05-08T09:23:54","date_gmt":"2015-05-08T07:23:54","guid":{"rendered":"https:\/\/pa3csg.nl\/?page_id=65"},"modified":"2019-05-08T08:27:45","modified_gmt":"2019-05-08T06:27:45","slug":"coupler-from-1-5-to-70-or-80-mhz","status":"publish","type":"page","link":"https:\/\/pa3csg.nl\/?page_id=65","title":{"rendered":"Coupler from 1.5 to 70 or 80 MHz"},"content":{"rendered":"

Coupler from 1.5 to 70 or 80 MHz<\/h1>\n

Published here are 2 couplers with a T94-2 and a T94-6.<\/p>\n

The first coupler was build with a T94-2 in order to cover the whole HF spectrum + 50 and 70 MHz. It produced some good results up to 70 MHz. but not much higher.
\nThe number of turns was 32 on a T94-2. For a complete building instructions (if needed) please refer to THIS<\/a> article.<\/p>\n

Few changes were made: Ground the coax directly to your connector. The toroid should be as close to the connector as possible. Thanks PA0WMX<\/p>\n

Below are some measurements:<\/p>\n

First the coupler with the T94-2 and its plots (below)<\/p>\n

\u00a0\"coupler-kl\"<\/p>\n

 <\/p>\n

The coupling from 0-4 MHz (below)<\/p>\n

\"coupling-0-4MHz-kl\"<\/p>\n

\u00a0The Isolation (Isolation – coupling = directivity) from 0-4 MHz (below)<\/p>\n

\"directivity-0-4MHz-kl\"<\/p>\n

\u00a0The coupling from 0 – 100 MHz (below)<\/p>\n

\"coupling-0-100MHz-kl\"<\/p>\n

The Isolation (Isolation – coupling = directivity) from 0 – 100 MHz (below)<\/p>\n

\"directivity-0-100MHz-kl\"<\/p>\n

 <\/p>\n

The same coupler build with a T94-6 Results are the same, it just goes a little bit higher in frequency.<\/p>\n

Coupling from 0 – 5 MHz (below)<\/p>\n

\"coupling0-5-MHz\"<\/p>\n

The Isolation (Isolation – coupling = directivity) from 0 – 5 MHz (below)<\/p>\n

\"directivity0-5-MHz\"<\/p>\n

\u00a0Coupling from 0 – 50 MHz (below)<\/p>\n

\"coupling0-50-MHz\"<\/p>\n

The Isolation (Isolation – coupling = directivity) from 0 – 50 MHz (below)<\/p>\n

\"directivity0-50-MHz\"<\/p>\n

Coupling from 0 – 150 MHz (below) unfortunately not working on 144 MHz.<\/p>\n

\"coupling0-150-MHz\"<\/p>\n

The Isolation (Isolation – coupling = directivity) from 0 – 150 MHz (below)<\/p>\n

\"directivity0-150-MHz\"<\/p>\n

The finished unit<\/p>\n

\"buitenkant\"<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Coupler from 1.5 to 70 or 80 MHz Published here are 2 couplers with a T94-2 and a T94-6. The first coupler was build with […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":511,"parent":0,"menu_order":17,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"categories":[38,16],"tags":[],"_links":{"self":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/65"}],"collection":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=65"}],"version-history":[{"count":5,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/65\/revisions"}],"predecessor-version":[{"id":1393,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/65\/revisions\/1393"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/media\/511"}],"wp:attachment":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=65"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=65"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=65"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}