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
FT240-61, ID=1.4", RFI Range 200-2000 MHz, Bulk Pack of 10Product DetailsMPN: F240-61Country/Region of Manufacture: ChinaRFI Range (MHz): 200-2000 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: 125A(L): 173Excellent for high power broadband RF transformers, RFI common mode noise suppression, AC/DC power cable suppression of high frequency harmonics, Bulk Pack of 10 rings.
Excellent for high power broadband RF transformers, RFI common mode noise suppression, AC/DC power cable suppression of high frequency harmonics, Bulk Pack of 10 rings.