Re: 2m/432 Antennas


Steve W3AHL
 

Avoid the Cushcraft VHF/UHF interlaced Yagi's, such as the A270-10.  They use a single feed point with a T-connector to drive both driven elements.  Since the 2M antenna is resonant as a 3/4 WL antenna at UHF, the UHF pattern is really messed up.  I worked with a local ham to add a VHF/UHF duplexor to isolate the two driven elements, but the gamma match tube for 2M DE was too short.  Lengthening it allowed it to tune, but the element spacicng really needed to be changed to get a decent pattern, which wasn't worth the effort.  He finally returned the antenna to MFJ for credit.

Steve, W3AHL

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