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
FT114-31 Ferrite Ring, ID=.748", RFI Range 1-300 MHz, Mix 31, POTA SOTA 1:1 Balun, Coax ChokeProduct DetailsMPN: F114-31Type: Ferrite Mix 31RFI Range (MHz): 1 KHz-300 MhzID-B (in/mm): .748/19OD-A (in/mm): 1.142/29Height-C (in/mm): .4Weight (oz/gm): 33 gramsInitial permeability: 1500Ferrite Ring Toroid Core, ID = ..748"/23mm, Mix 31
Excellent for 1:1 Balun for dipoles or wind with RG-316 coax for coax choke/Line isolator
FT114-31 Ferrite Ring, ID=.748", RFI Range 1-300 MHz, Mix 31, POTA SOTA 1:1 Balun, Coax Choke
Product Details
MPN: F114-31
Type: Ferrite Mix 31
RFI Range (MHz): 1 KHz-300 Mhz
ID-B (in/mm): .748/19
OD-A (in/mm): 1.142/29
Height-C (in/mm): .4
Weight (oz/gm): 33 grams
Initial permeability: 1500
Ferrite Ring Toroid Core, ID = ..748"/23mm, Mix 31
Excellent for 1:1 Balun for dipoles or wind with RG-316 coax for coax choke/Line isolator
