Hello: I now have in stock a Tape Whip Adapter that accepts 5/16-24 male threaded antennas (like are used on the PRC-25 and PRC-77) many of which are available on eBay at a reasonable price and screws into standard ham radio 3/8-24 antenna bases. More info at: <http://www.pacificsites.com/~brooke/TWA.shtml> 73, Brooke Clarke, N6GCE other mil radio products: http://www.prc68.com