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
FT240-52, ID=1.4", 10 Pack, RFI Range 200-1000 MHz, FREE USA SHIPPING!Product DetailsRFI Range (MHz): 200-1000 MhzID-B (in/mm): 1.4/35.6OD-A (in/mm): 2.4/61Height-C (in/mm): .5/12.7Weight (oz/gm): 106 gramsInitial permeability: 250A(L): 325Inductor Range (MHz): < 30Transformer Range (MHz): 1-60Case/Box lot size: 100for transmission line transformers, RFI suppression - Jerry Sevick book most used mix
FT240-52, ID=1.4", 10 Pack, RFI Range 200-1000 MHz, FREE USA SHIPPING!
Product Details
RFI Range (MHz): 200-1000 Mhz
ID-B (in/mm): 1.4/35.6
OD-A (in/mm): 2.4/61
Height-C (in/mm): .5/12.7
Weight (oz/gm): 106 grams
Initial permeability: 250
A(L): 325
Inductor Range (MHz): < 30
Transformer Range (MHz): 1-60
Case/Box lot size: 100
for transmission line transformers, RFI suppression - Jerry Sevick book most used mix