5:1 Baluns/Ununs

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:

CU-5-1500 antenna

Also available as a balanced output – CB-5-1500

DELUXE Desktop Computer with AC power RFI Kit - 11 Filters

In stock
Product Details

DELUXE Desktop Computer RFI Kit - for 3 AC Powered devices and interconnect wires

Deluxe Desktop Computer RFI Kit for- 1 Ring Filter for computer AC power + 6 Snap On filters for interconnect cables plus 2 additional AC power Ring filter and 2 snap on filters for interconnect cables of peripherals such as printers, AC powered speakers, etc. The filters are selected to eliminate RFI from 1 to 300 MHz. 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.

Deluxe filter set for eliminating noise and RFI due to routers, wall wart power supplies, CB, AM broadcast and ham radio interference, etc.

Installation is easy. AC power cord through ring filter multiple times and snap on filters on I/O cables nearest computer - problem cured!

Save this product for later