{"id":270,"date":"2023-01-27T12:54:16","date_gmt":"2023-01-27T11:54:16","guid":{"rendered":"http:\/\/sp5tof.vxm.pl\/?page_id=270"},"modified":"2025-11-21T18:40:59","modified_gmt":"2025-11-21T17:40:59","slug":"chinese-power-amplifier-100w","status":"publish","type":"post","link":"https:\/\/sp5tof.pl\/?p=270","title":{"rendered":"Chinese Power Amplifier 100W"},"content":{"rendered":"<p>I purchased the PA 100W kit on Aliexpress for my QRP X1M transceiver. <\/br><br \/>\nThis is exactly what I&#8217;m talking about: <center><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/circuit-300x282.png\" alt=\"\" width=\"300\" height=\"282\" class=\"alignnone size-medium wp-image-273\" srcset=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/circuit-300x282.png 300w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/circuit-405x380.png 405w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/circuit.png 491w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/center><\/br><br \/>\nThis PA works quite nice from 80m up to 10m, but higher band means a little less output power(expected behaviour). This kind of PA kit has two big imperfections:<\/br><\/p>\n<ul>\n<li> Lack of TX\/RX switching<\/li>\n<li> Manufacturer provides it with LPF just for one band<\/li>\n<\/ul>\n<p>In case of 1st issue, I had to build such TX\/RX driven switch on my own. What is more, I had to equip my QRP TRX (X1M) with external PA driver (please find my another project about it). <\/br> The second issue is only about multi-band transceiver. In case of mono-band, Low-Pass filter just for one band is enough. In my case, I used LPF-PCB from Huzarek TRX and build LPF filters for demanded bands(80-20m) with this one.<br \/>\n<\/br><br \/>\nCurrently, you can find well developed version of this KIT on Ali (onboard Tx\/Rx switch with relay and so). I strongly recommend not to purchase this one if you&#8217;re in the beginning of Ham Radio fun \ud83d\ude42 <\/p>\n<h3 style=\"text-align: right;\"><span style=\"color: #ffffff;\"><strong>Jakub\/SP5TOF<\/strong><\/span><\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170505_100115_resized_20170505_100257768-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" class=\"alignnone size-medium wp-image-277\" srcset=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170505_100115_resized_20170505_100257768-300x225.jpg 300w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170505_100115_resized_20170505_100257768-1024x768.jpg 1024w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170505_100115_resized_20170505_100257768-768x576.jpg 768w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170505_100115_resized_20170505_100257768-507x380.jpg 507w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170505_100115_resized_20170505_100257768.jpg 1200w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170429_122223-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" class=\"alignnone size-medium wp-image-278\" srcset=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170429_122223-225x300.jpg 225w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170429_122223-768x1024.jpg 768w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170429_122223-285x380.jpg 285w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170429_122223.jpg 900w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170501_101558-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" class=\"alignnone size-medium wp-image-279\" srcset=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170501_101558-225x300.jpg 225w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170501_101558-768x1024.jpg 768w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170501_101558-285x380.jpg 285w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/IMG_20170501_101558.jpg 900w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/lpf_4-300x231.jpg\" alt=\"\" width=\"300\" height=\"231\" class=\"alignnone size-medium wp-image-280\" srcset=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/lpf_4-300x231.jpg 300w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/lpf_4-768x591.jpg 768w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/lpf_4-494x380.jpg 494w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/lpf_4.jpg 992w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/image_2-300x224.jpeg\" alt=\"\" width=\"300\" height=\"224\" class=\"alignnone size-medium wp-image-281\" srcset=\"https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/image_2-300x224.jpeg 300w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/image_2-1024x765.jpeg 1024w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/image_2-768x573.jpeg 768w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/image_2-509x380.jpeg 509w, https:\/\/sp5tof.pl\/wp-content\/uploads\/2023\/01\/image_2.jpeg 1200w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I purchased the PA 100W kit on Aliexpress for my QRP X1M transceiver. This is exactly what I&#8217;m talking about: This PA works quite nice from 80m up to 10m,&hellip; <\/p>\n","protected":false},"author":1,"featured_media":273,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-270","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-radio"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/sp5tof.pl\/index.php?rest_route=\/wp\/v2\/posts\/270","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sp5tof.pl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sp5tof.pl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sp5tof.pl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sp5tof.pl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=270"}],"version-history":[{"count":7,"href":"https:\/\/sp5tof.pl\/index.php?rest_route=\/wp\/v2\/posts\/270\/revisions"}],"predecessor-version":[{"id":283,"href":"https:\/\/sp5tof.pl\/index.php?rest_route=\/wp\/v2\/posts\/270\/revisions\/283"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sp5tof.pl\/index.php?rest_route=\/wp\/v2\/media\/273"}],"wp:attachment":[{"href":"https:\/\/sp5tof.pl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=270"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sp5tof.pl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=270"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sp5tof.pl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=270"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}