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The above dipole is correctly scaled if you are using a 1:1 balun. Since most available baluns are 4:1, it is necessary to increase the length of each dipole by about 2 1/4" for overcome the impedance mismatch.
Our design engineer recently whipped up a simple dipole that we are considering making available as an add-on for our ClearStream UHF antennas. His elements are each 16.25" from the balun terminal to the tip with a gap of about 1.5" between the balun terminals.
In Palo Alto, expect strong potential interference from FM stations off of San Bruno. Use either an HLSJ with the "L" port terminated or an FM filter that attenuates the entire FM band (ours does).
Last edited by ADTech; 31-Jan-2011 at 5:40 PM.
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