AREADBPRIN d +@n$ @ @$ @x!! @ HAM RADIO AIDS @"" @ YAGI CALCULATOR @ @ DE @ @ WB4BZX-@A%  + ,,($THIS PROGRAM IS DESIGNED TO GIVE YOU**("THE DEMENSIONS FOR CONSTRUCTING A**("YAGI ANTENNA. WHEN THE '?' APPEARS**("ENTER THE REQUESTED DATA AND PRESS(THE Π KEY.("--(%*************************************,(6**("Program design by WB4BZX, Randy T.@++(#Agee, September 1981, for ATARI 400J+(( and 800 personal computers. +(Tff(^Distribution and reproduction are encouraged. But, please don't try to sell this program!^(h--(%*************************************r ( (|;@,;@,,(,(! PRESS Π TO CONTINUE +t( (t(fALL CALCULATIONS ARE ACCURATE FOR FREQUENCIES BELOW 30 MHZ.,ACCORDING TO ARRL ANTENNA HANDBOOKS.T(T(ITHIS PROGRAM MAY BE USED FOR ABOVE 30 MHZ. AS A DESIGN REFERENCE ONLY.QQ(ISPECIAL CONSIDERATION WILL HAVE TO BE GIVEN TO ELEMENT SIZE. CONSULT ANY,,($RELIABLE ANTENNA REFERENCE SOURCE ASRR(JFINE ADJUSTMENTS WILL BE REQUIRED TO COMPENSATE FOR ELEMENT DIAMETERS.V(V(KIT IS UNDERSTOOD THIS ANTENNA WILL BE CONSTRUCTED OF ALUMINUM TUBING WITH ADD(((( FEET LONG, THE DISTANCE FROM THEH--(%DRIVEN ELEMENT TO THE DIRECTOR SHOULDRKK(BE +B2',$? INCHES OR ++B2',$?,'@\( FEET LONG.f--(% THE TOTAL BOOM LENGTH IN FEET WILLpKK(BE +++B2',$?,'@,%+++B2',$? ,'@,zA(A(6 PRESS ξ TO DO ADDITIONAL CALCULATIONS. A + ( ( ($$( Ҡנ(++(#THIS DESIGN ANTENNA WILL BE FOR A 2,,($ELEMENT YAGI WITH THE PARASITIC ELE-**("MENT TUNED AS A DIRECTOR. ELEMENT((( SPACING WILL BE .1 WAVELENGTH OF**("THE DESIRED FREQUENCY TO PRODUCE A--(%MAXIMUM FORWARD GAIN OF APPROXIMATELY((( 4.5db. THIS FORMULAR WAS USED TO,,($PROVIDE MAXIMUM FRONT TO BACK RATIOS++(#RATHER THAN THE ADDITIONAL 1db GAIN--(%POSSIBLE WITH .15 SPACING AND A PARA-$(SITIC REFLECTOR..(8++(#PLEASE ENTER YOUR DESIRED FREQUENCYB( IN MEGAHERTZ.L(V` +j(t(((FOR  MEGAHERTZ YOUR ANTENNA~(DEMINSIONS SHOULD BE:(%%(DIRECTOR (PARASITIC ELEMENT)=BB(AV'$? INCHES, OR +AV'$?,'@ (FEET.(##(DRIVEN ELEMENT = AV'00( INCHES, OR +AV','@ FEET.(..(THE BOOM LENGTH = +B2',$?::( INCHES, OR ++B2',$?,'@ FEET. ( (--(%FURTHER INFORMATION TO MATCH THE LINE,,($TO THE ANTENNA WILL BE FOUND IN MOST (ANTENNA HANDBOOKS.@(@(5 PRESS Π TO DO ADDITIONAL CALCULATIONS.( A  D:YAGICAL.BAS