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
Ferrite Snap On Combo Pack, Mix 31, 61, 75 ID=1/4"/6.3mm, RFI Range 150 KHz-2000 MHz, 10 FiltersProduct DetailsMPN: FSCP-3161-1/4Initial Permeability (@ 10KHz): 1500Material: MnZnMax cable size - in/mm: .25/6.3OD (A) - in/mm: .788/20ID (B) - in/mm: .26/6.6Length (C) - in/mm: 1.55/3.94Now you can get a ferrite snap on combo pack of 10 RFI filters in 1/4" size with all three filter ranges (great if you don't know the interfering frequency and need to cover the entire range when troubleshooting an RFI problem).
Mix 75 covers 150 KHz to 10 MHz (3 filters)
Mix 31 covers 1-300 MHz (usable to 500 MHz) (4 filters)
Mix 61 covers 200-2000 MHz (3 filters)
Use multiple turns for best results. (2 turns - 4 times a single turn, 3 turns = 9 times a single turn, etc.)
Now you can get a ferrite snap on combo pack of 10 RFI filters in 1/4" size with all three filter ranges (great if you don't know the interfering frequency and need to cover the entire range when troubleshooting an RFI problem).
Mix 75 covers 150 KHz to 10 MHz (3 filters)
Mix 31 covers 1-300 MHz (usable to 500 MHz) (4 filters)
Mix 61 covers 200-2000 MHz (3 filters)