El cheapo 9:1 balun

As you should know , im still in college , in a simple equation that means , -less money - fun + lots of study= quick and dirty solutions , today i had some spare time so i decided that i was able to build a 9:1 magnetic balun for a small random wire , that way i can hang it anywhere , so with lack of time money or toroids , i found the a dirt cheap source , yeah , Power supply toroids , computer power supplies have lots of toroids , and the only things needed for removing them are a pair of pliers and a screwdriver , here in valparaiso (a university driven city ) is common to find them in the dumpsters behind IT faculties , or labs , so i had two of them on hand i managed to recover two toroid with minimium effort , i got two toroids of abt 1 inch wide , green blue ones , i didnt have the correct permeability coef expressed as you should know in teslas , so i started to experiment , picked one and winded 20 turns for the secondary , and 10 for the primary , armed with a piece of wire to act as antenna , and a crappy monimatch style SWR meter and offcourse an HF rig , also my mothers patience for not being able to watch tv (anyway thanks mom for not bitching me for ruining the news hour )! , i started to try to find the impedance , how , well i know two thing , in order to get a measurement from my crappy SWR meter i have to find a point where the impedance is between 35 ohms and 60 ohms otherwise it will be infinite , finding that point with the primary , i proceeded to trim the secondary , and the best match was , Secondary 14 turns of doorbell wire , and the primary was composed of 2,5 turns of doorbell wire , offcourse performance is poor and it will only used with QRP power levels

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