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Reviews Categories | Antenna parts, accessories, incl. baluns, hardware, etc. | CWS UN-5.56 Help

Reviews Summary for CWS UN-5.56
Reviews: 1 Average rating: 2.0/5 MSRP: $$49.95
Description: UN UN balun 50 to 5.56 Ohm 1 to 30 MHz
Product is in production.
More info: http://
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K6KBE Rating: 2/5 Aug 24, 2011 16:42 Send this review to a friend
Poor design  Time owned: 0 to 3 months
I purchased the balun to run some antenna development impedance tests and the modeling suggested a 9:1 50 to 5.56 ohm UN-UN. When I received the balun I tested it on a VNA before use. The balun was inductively reactive over its entire range. OK from 1 to 5 MHz <1.5:1 The VSWR at 30 MHz was >6.8:1. The R was over 100 and the reactance very high. I contacted the factory and they replaced it with a core of perm of approx 100 or near a type 61 material. Should have been fine. Sorry no cigar. It is OK up to 11 MHz now at <1.5:1 but still off the charts > 20 MHz.
For those using it as a element on an lower HF band antenna and are willing to tune it, it will be CLOSE ,but certainly not a 1 - 30 MHz device.

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