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Antennas_CD-ROM_Walnut_Creek_September_1996.iso
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basic
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windom.asc
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1996-06-30
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2KB
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46 lines
100 CLS : PRINT " **********************************"
110 PRINT " * WINDOM ANTENNAS *"
120 PRINT " *SEE MORRIS, HAM RADIO, JAN. 1974*"
130 PRINT " * AND ARRL ANTENNA BOOK, 8TH ED. *"
140 PRINT " * PROGRAM COPYRIGHT 1985 *"
150 PRINT " * R.P. HAVILAND, W4MB *"
160 PRINT " **********************************"
165 REM PROGRAM 4
170 DEF FNP (X) = INT(10 * X + .5) / 10
200 PRINT "THE BASIC WINDOM USES A SINGLE WIRE"
210 PRINT "FEEDER OF 600 OHM IMPEDANCE (APPROX.)"
220 PRINT "THE MODIFIED TYPE USES 300 OHM TWINLEAD"
230 PRINT "BOTH WILL OPERATE ON EVEN HARMONICS"
240 PRINT "A MATCH-BOX IS RECOMMENDED."
250 PRINT "A WIRE ANTENNA IS ASSUMED"
260 PRINT : INPUT "ENTER DESIGN FREQUENCY"; FO
270 LA = 468 / FO
300 PRINT "ENTER 1=BASIC WINDOM"
310 PRINT " 2=MODIFIED TYPE"
320 PRINT " 3=QUIT"
330 INPUT AT
340 ON AT GOSUB 400, 600, 1000, 300
350 PRINT
360 GOTO 200
400 FP = .36 * LA
410 PRINT : PRINT "ANTENNA LENGTH="; FNP(LA); "FEET"
420 PRINT " FEED AT"; FNP(FP); "FEET FROM END"
430 PRINT : PRINT "PRESS A KEY FOR MORE"
440 Q$ = INKEY$: IF Q$ = "" GOTO 440
450 GOSUB 800
460 PRINT : PRINT "PRESS A KEY FOR MORE"
470 Q$ = INKEY$: IF Q$ = "" GOTO 470
480 RETURN
600 FP = .325 * LA
610 GOSUB 410
620 RETURN
800 PRINT : PRINT "ADDED RESONANCES ARE APPROXIMATELY"
810 PRINT " OVERTONE FREQUENCY-MHZ"
820 FOR N = 2 TO 16 STEP 2
830 FH = (492 * (N - .05)) / LA
840 PRINT N, FNP(FH)
850 NEXT N
860 RETURN
1000 END