5:1 CUBE™ Unun – Model CU-5-1500 (50:250 Ohm, 1.8-61 MHz, 1.5KW PEP)
Application. For traveling wave, end fed or portable 20-31 foot vertical antennas the 5:1 unun makes a good transformer for converting 50 ohm coax to a 250 ohm feed point. If you use the antenna on multiple bands, the feed point impedance may not always be 250 ohms and use of the unun at high (>350 ohms) or low (<100 ohms) will require reduced power input or the unun may have its power ratings exceeded and damage to the unun may occur. The (5:1 conversion ratio will change for loads other than 250 ohms unbalanced.
Typical application:
Also available as a balanced output – CB-5-1500
Balun/Unun DIY Kits
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Enclosure Box - 4.375" x 4.375" x 2.375"
Enclosure Box - 4.375" x 4.375" x 2.375"
SKU CB-Box-1
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FT140-43, ID=.9", OD=1.4", RFI Range 25-300 MHz
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Side Eyebolt Kit - 1/4-20 Stainless Steel
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SO-239 Kit (female chassis connector + hardware)
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SKU SO-239 Kit-1/2
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Balun/Unun DIY Kits
Refine by
Enclosure Box - 4.375" x 4.375" x 2.375"
Enclosure Box - 4.375" x 4.375" x 2.375"
SKU CB-Box-1
$14.95
On Sale
FT140-43, ID=.9", OD=1.4", RFI Range 25-300 MHz
FT140-43, ID=.9", OD=1.4", RFI Range 25-300 MHz
SKU F140-43
List price
$4.50
Save 14%
$3.89
Side Eyebolt Kit - 1/4-20 Stainless Steel
Side Eyebolt Kit - 1/4-20 Stainless Steel
SKU SEK-1/4-1
$5.95
SO-239 Kit (female chassis connector + hardware)
SO-239 Kit (female chassis connector + hardware)
SKU SO-239 Kit-1/2
$3.95