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
Extra Large Ring/Multi-Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 28 filters (1/4", 1/2", 1.4")Product DetailsMPN: XLRSCP-31-28Material: 31This Extra Large size Ring and Snap-On Combo Pack is our BEST VALUE and a convenient solution for troubleshooting RFI/EMI (1-300 MHz) with various diameter cables ranging from 1.4" to 1.4"/35.6mm for use as either single turn or multiple turn RFI filters. Great for Grab and Go portable operations or general RFI and noise suppression.
The filters are useful for RF coax, AC/DC power cables, Ethernet, data, audio/video and device interconnection cables.
Always use a snap on or ring 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 turn). Included in these combo packs are our most popular snap on sizes as follows:
Extra Large Combo Pack includes the following:
F240-31 ring – 1.4″/35.6mm ID – 6 pieces
FSB31-1/4 – 1/4″/9.5mm ID – 12 pieces
FSB31-1/2 – 1/2″/12.7mm ID – 10 pieces
Normal Retail price is $139.95 for these parts bought individually. You also get FREE SHIPPING for this item.
On Sale
FSB31-3/4, ID=3/4", RFI Range 1-300 MHz, Bulk Pack of 10FSB31-3/4, ID=3/4", RFI Range 1-300 MHz, Bulk Pack of 10SKU FSB31-3/4-10List price $69.50 Save 14%$59.95
This Extra Large size Ring and Snap-On Combo Pack is our BEST VALUE and a convenient solution for troubleshooting RFI/EMI (1-300 MHz) with various diameter cables ranging from 1.4" to 1.4"/35.6mm for use as either single turn or multiple turn RFI filters. Great for Grab and Go portable operations or general RFI and noise suppression.
The filters are useful for RF coax, AC/DC power cables, Ethernet, data, audio/video and device interconnection cables.
Always use a snap on or ring 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 turn). Included in these combo packs are our most popular snap on sizes as follows:
Extra Large Combo Pack includes the following:
F240-31 ring – 1.4″/35.6mm ID – 6 pieces
FSB31-1/4 – 1/4″/9.5mm ID – 12 pieces
FSB31-1/2 – 1/2″/12.7mm ID – 10 pieces
Normal Retail price is $139.95 for these parts bought individually. You also get FREE SHIPPING for this item.
