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
FM Broadcast RFI Kit - AC/DC/Audio/Control, RFI Range: 20-250 MHz, 13 filtersProduct DetailsBrand: Palomar EngineersThis RFI kit is designed to suppress RFI caused by FM broadcast transmitters in the range of 88-108 MHz and is useful for RFI signals from 20-250 MHz.
The kit contains large ferrite toroids for the AC/DC power lines and snap on beads for input cables (like mic and mixer input cables) of RFI effected devices.
The beads are easy to use, don’t require modification of the protected equipment and work in almost all cases, even when plug-in filters fail.
Rings have 1.4″ hole and SNAP ON filters have 1/2″ hole – mix selected for the frequencies of interference. 5 rings, 8 Snap On beads included.
This RFI kit is designed to suppress RFI caused by FM broadcast transmitters in the range of 88-108 MHz and is useful for RFI signals from 20-250 MHz.
The kit contains large ferrite toroids for the AC/DC power lines and snap on beads for input cables (like mic and mixer input cables) of RFI effected devices.
The beads are easy to use, don’t require modification of the protected equipment and work in almost all cases, even when plug-in filters fail.
Rings have 1.4″ hole and SNAP ON filters have 1/2″ hole – mix selected for the frequencies of interference. 5 rings, 8 Snap On beads included.