I am not sure if this will make it to the list since yahoo is messing with = my mail. The description says it is 900mm (35=94) long, that seems to be short for a= n end fed half-wave 160 MHz would be 1.88m wavelength, so 900mm is a bit short(should be 940mm)= , so it might have difficulty to go down to 156MHz. The major issue with th= is kind of antenna is the environment, and also it might need a RF choke (t= oroid ring) on the coax to avoid RF in the shack. And, as John said, It=92s hard to deal with those end-fed half-wave antenna= s. My $0.02 Jean-Paul AC9GH On Jun 5, 2014, at 7:38 AM, RussellMc wrote: >>=20 >>=20 >> ... >> I have seen an antenna like that in the books. The coax runs up through >> the bottom section with the shield turning inside out and turns >> downward. The inner conductor continues to >> quarter wave to complete the half wave dipole. >> ... >>=20 >=20 > That brings back memories of a balun that achieved it's dark magic by suc= h > means. > Garbling something like 'coaxial balun' may produce an example >=20 > Garblinges ... >=20 > Lots of fodder here > https://www.google.co.nz/search?q=3Dcoaxial+balun&tbm=3Disch&tbo=3Du&sour= ce=3Duniv&sa=3DX&ei=3DTFSQU66gIouXkwX734CYBA&sqi=3D2&ved=3D0CCAQsAQ&biw=3D1= 920&bih=3D1032 > Any of these look like what you have? >=20 > A few possible starters: >=20 > http://www.aeroelectric.com/articles/BALUN/Balun_Fabrication.html >=20 > http://www.iv3sbe.webfundis.net/html/BALUN.htm > http://www.qsl.net/iz7ath/web/02_brew/11_balun/pag01_eng.htm >=20 >=20 > Russell > --=20 > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .