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
FT Mix 61 - RFI Range: 200-2000 MHz
Mix #52, Material: NiZn, Initial Permeability: 250
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Ferrite Ring Combo Pack, FT140 - .9" ID, 15 Rings - Mix 43, 61, 77, RFI Range .1-2000 MHz
Ferrite Ring Combo Pack, FT140 - .9" ID, 15 Rings - Mix 43, 61, 77, RFI Range .1-2000 MHz
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SKU FRCP-240-10
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FT140-61, ID=.9", RFI Range 200-2000 MHz - Bulk 10 Pack
FT140-61, ID=.9", RFI Range 200-2000 MHz - Bulk 10 Pack
SKU F140-61-10
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FT140-61, ID=.9", RFI Range 200-2000 MHz - TX36/23/15-4C25 Replacement
FT140-61, ID=.9", RFI Range 200-2000 MHz - TX36/23/15-4C25 Replacement
SKU F140-61
List price
$4.50
Save 14%
$3.89
FT240-61, ID=1.4", RFI Range 200-2000 MHz
FT240-61, ID=1.4", RFI Range 200-2000 MHz
SKU F240-61-1
$16.95
FT Mix 61 - RFI Range: 200-2000 MHz
Mix #52, Material: NiZn, Initial Permeability: 250
Refine by
On Sale
Ferrite Ring Combo Pack, FT140 - .9" ID, 15 Rings - Mix 43, 61, 77, RFI Range .1-2000 MHz
Ferrite Ring Combo Pack, FT140 - .9" ID, 15 Rings - Mix 43, 61, 77, RFI Range .1-2000 MHz
SKU FRCP-140-15
List price
$58.35
Save 14%
$49.95
On Sale
Ferrite Ring Combo Pack, FT240 - 1.4" ID, 10 Rings - Mix 31(4), 61(3), 75(3), RFI Range .15-2000 MHz
Ferrite Ring Combo Pack, FT240 - 1.4" ID, 10 Rings - Mix 31(4), 61(3), 75(3), RFI Range .15-2000 MHz
SKU FRCP-240-10
List price
$139.50
Save 14%
$119.95
On Sale
FT140-61, ID=.9", RFI Range 200-2000 MHz - Bulk 10 Pack
FT140-61, ID=.9", RFI Range 200-2000 MHz - Bulk 10 Pack
SKU F140-61-10
List price
$38.95
Save 10%
$34.95
On Sale
FT140-61, ID=.9", RFI Range 200-2000 MHz - TX36/23/15-4C25 Replacement
FT140-61, ID=.9", RFI Range 200-2000 MHz - TX36/23/15-4C25 Replacement
SKU F140-61
List price
$4.50
Save 14%
$3.89
FT240-61, ID=1.4", RFI Range 200-2000 MHz
FT240-61, ID=1.4", RFI Range 200-2000 MHz
SKU F240-61-1
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