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 75, RFI Range 150 KHz-10 MHz - 8 filtersProduct DetailsThe Ferrite Snap On Combo Pack is a convenient solution for troubleshooting RFI/EMI with various diameter cables ranging from 1/4″ to 3/4″ for use as either single turn or multiple turn ferrite chokes. The snap on chokes are useful for RF coax, AC/DC power cables, and device interconnection cables.
Always use a snap on with a larger inside diameter than the diameter of the cable and use multiple turns if possible (2 turns through the snap on is the same as 4 snap ons with 1 turns). Included in these combo packs are our most popular snap on sizes as follows:
Mix 75 Ferrite Snap On Combo 8 pack (RFI Suppression range is 150 KHz – 10 MHz)
FSB75-1/4 – 1/4″ ID – 4 pieces
FSB75-1/2 – 1/2″ ID – 2 pieces
FSB75-3/4 – 3/4″ ID – 2 pieces
Normal Retail price is $140 for these parts individually - this items qualifies your USA order for free shipping.
Excellent for AC/DC power cables on switching power supplies, variable speed motor controllers, and data/audio/video cables for AM broadcast RFI suppression.
The Ferrite Snap On Combo Pack is a convenient solution for troubleshooting RFI/EMI with various diameter cables ranging from 1/4″ to 3/4″ for use as either single turn or multiple turn ferrite chokes. The snap on chokes are useful for RF coax, AC/DC power cables, and device interconnection cables.
Always use a snap on with a larger inside diameter than the diameter of the cable and use multiple turns if possible (2 turns through the snap on is the same as 4 snap ons with 1 turns). Included in these combo packs are our most popular snap on sizes as follows:
Mix 75 Ferrite Snap On Combo 8 pack (RFI Suppression range is 150 KHz – 10 MHz)
FSB75-1/4 – 1/4″ ID – 4 pieces
FSB75-1/2 – 1/2″ ID – 2 pieces
FSB75-3/4 – 3/4″ ID – 2 pieces
Normal Retail price is $140 for these parts individually - this items qualifies your USA order for free shipping.
Excellent for AC/DC power cables on switching power supplies, variable speed motor controllers, and data/audio/video cables for AM broadcast RFI suppression.
