{"id":7607,"date":"2022-11-03T17:24:31","date_gmt":"2022-11-03T06:24:31","guid":{"rendered":"https:\/\/amateurradiosupplies.com.au\/?post_type=product&#038;p=7607"},"modified":"2026-03-28T10:25:42","modified_gmt":"2026-03-27T23:25:42","slug":"rm-italy-kl-503-hd-hf-linear-amplifier","status":"publish","type":"product","link":"https:\/\/amateurradiosupplies.com.au\/index.php\/product\/rm-italy-kl-503-hd-hf-linear-amplifier\/","title":{"rendered":"RM Italy KL-503HD HF Linear Amplifier"},"content":{"rendered":"<p>KL-503HD: The KL-503HD amplifier can take input power up to 35 Watts, operates on AM-FM-SSB-CW mode, great for 10M Ham band operation. Do not use those cheap &#8220;PC type&#8221; power supplies on these units! It will cause humming, and noise in your receive! Use only quality power supplies with good filtering.<\/p>\n<p>Specifications:<br \/>\nKL-503HD: High Drive Version<br \/>\nFrequency: 25-30 MHz<br \/>\nInput energy\/power: 12-14 A<br \/>\nInput power: 1-35 Watts on all modes<br \/>\nOutput power: 300 Watts Max<br \/>\nMax Bypass power: (Amplifier off): 50W Max<br \/>\nMode: AM-FM-SSB-CW data etc (all narrowband mode)<br \/>\nTransistor: 8 x RM3 Mosfet + 1 x RM4 Mosfet Driver<br \/>\nFuse: 3 x 10 A<br \/>\nPreamp: 26dB<br \/>\nInput VSWR: 1.1 &#8211; 1.5:1<br \/>\noutput VSWR max: 2.5:1<br \/>\nOutput power level: 6<br \/>\nElectronic switch<br \/>\nInversion polarity protection<br \/>\nSize: 170 x 295 x 62mm<\/p>\n","protected":false},"excerpt":{"rendered":"<p>KL-503HD: The KL-503HD amplifier can take input power up to 35 Watts, operates on AM-FM-SSB-CW mode, great for 10M Ham [&hellip;]<\/p>\n","protected":false},"featured_media":15400,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[35],"product_tag":[],"class_list":{"0":"post-7607","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-amplifiers","8":"first","9":"instock","10":"shipping-taxable","11":"purchasable","12":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product\/7607","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/comments?post=7607"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/media\/15400"}],"wp:attachment":[{"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/media?parent=7607"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product_brand?post=7607"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product_cat?post=7607"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product_tag?post=7607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}