{"id":16946,"date":"2026-07-23T17:55:04","date_gmt":"2026-07-23T07:55:04","guid":{"rendered":"https:\/\/amateurradiosupplies.com.au\/?post_type=product&#038;p=16946"},"modified":"2026-07-23T17:55:04","modified_gmt":"2026-07-23T07:55:04","slug":"palomar-cu-1-5000so-11-cube-feed-line-choke-unun-5kw","status":"publish","type":"product","link":"https:\/\/amateurradiosupplies.com.au\/index.php\/product\/palomar-cu-1-5000so-11-cube-feed-line-choke-unun-5kw\/","title":{"rendered":"Palomar CU-1-5000SO 1:1 Cube Feed Line Choke UNUN 5kW"},"content":{"rendered":"<p><strong>ITEM PRICES ON SHIPPING ARRIVALS<\/strong><\/p>\n<p>CU-1-5000SO: This higher power UNUN utilizes mil-spec coax cable for the windings on a extra large core toroid with coax silver shield and silver braid for low loss. The dielectric is Teflon insulation for high voltage ratings of 1,900 volts. (A typical 5KW signal at 50 Ohms impedance will have a voltage of 500 volts at 1:1 SWR). Wired as a UNUN (CU-1-5000) with SO-239 input and output connectors.<br \/>\nIf you run RTTY contests or FT8 at 1500 watts output, this is the Balun \/ UNUN you need \u2013 it won\u2019t burn out at heavy 1500 watt duty cycles like other brands rated at 1500 watts (or more). We use these same chokes in our own RTTY station at full 1500 watts output and they have never failed. We use one at the amplifier output and another at each antenna feed point. Works very well on OCF antennas below the 4:1 balun to keep RF current on the antenna and off the feed line. THIS IS OUR MOST POPULAR HIGH POWER UNUN!<\/p>\n<p>Specifications:<br \/>\nBrand: Palomar Engineers<br \/>\nEffective Frequency Range (MHz): 1.8-61 MHz<br \/>\nPEP Power Rating (watts): 5000<br \/>\nEstimated Insertion Loss (dB): .0123 dB (1 MHz) &#8211; .1218 dB (50 MHz)<br \/>\nCommon Mode Rejection: (20-38dB)<br \/>\nInput Connector Type: SO-239 female<br \/>\nOutput Connector Connector Type: SO-239 female<br \/>\nGround Connector (Y\/N): none<br \/>\nEnclosure Size (L x W x H inches): 4 x 4 x 2<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ITEM PRICES ON SHIPPING ARRIVALS CU-1-5000SO: This higher power UNUN utilizes mil-spec coax cable for the windings on a extra [&hellip;]<\/p>\n","protected":false},"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[37],"product_tag":[],"class_list":["post-16946","product","type-product","status-publish","product_cat-antenna-accessories","first","instock","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product\/16946","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=16946"}],"wp:attachment":[{"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/media?parent=16946"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product_brand?post=16946"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product_cat?post=16946"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/amateurradiosupplies.com.au\/index.php\/wp-json\/wp\/v2\/product_tag?post=16946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}