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World of Ham Radio 1997
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1997-02-01
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03/92-A
D I S K D E S C R I P T I O N S
A n t e n n a D e s i g n P r o g r a m s
All programs provide graphics support to generate on-
screen plots of computed results as appropriate.
DISK 1 - Sloping Vee Antenna
Programs to calculate optimum apex angle, input
resistance, and radiation pattern for Sloping Vee antennas
over real, lossy earth. Properly designed Sloping Vees
provide exceptional gain-bandwidth performance. This
antenna is useful from HF through UHF.
DISK 2 - Yagi Antenna
Programs to compute Yagi dimensions based on the famous
National Bureau of Standards Tech Note 688, to create Yagi
data files, and to compute input impedance, current
distribution, and radiation patterns for Yagi-Uda antennas
over real, lossy earth. These programs take into account
both the effects of non-sinusoidal current distributions on
the antenna elements and the effects of reflections from an
imperfect earth.
DISK 3 - Antenna Utilities 1
Three useful programs to compute the mutual impedance
between dipole elements, maximum communication range based
on virtual reflection height and take-off angle, and maximum
obstruction height based on distance to obstruction and take-
off angle.
DISK 4 - Antenna Utilities 2
Three useful programs that compute the required
capacitance for an antenna gamma match (based on user-
specified dimensions for the matching elements); reflection
coefficients for real, lossy earth; and propagation
constant, input impedance and other properties for wires
above and below the earth's surface.
DISK 5 - Dipole Antennas 1
Three useful programs that compute the current
distribution (in-phase and quadrature components and
magnitude) and impedance and admittance of center-fed dipole
elements. These programs are based on the Method of Moments
to take into account finite element diameter and non-
sinusoidal current distribution.
DISK 6 - Math Utilities 1
Two useful mathematical utilities for inverting
matrices and solving complex linear systems of the form
Ax=B, where A is an NxN complex matrix, x is an Nx1 unknown
vector, and B is an Nx1 known column vector. Systems as
large as 50x50 can be solved in seconds even on 4.77 Mhz XT
class PCs.
DISK 7 - Math Utilities 2
Two useful programs for interpolating and plotting data
using a Cubic Spline and for computing and plotting the
complex-valued Exponential Integral function for complex
arguments. The Exponential Integral occurs frequently in
antenna analysis, and the spline interpolation is useful for
managing any type of data where intermediate results are not
available.
DISK 8 - Antenna Utilities 3
Three programs that compute the dimensions of an
optimized Log-Periodic Dipole Array (LPDA), the resistive
and capacitive loading profile for broadband monopole and
dipole elements (Kanda-King model), and the characteristics
of hand-held radiators (Hansen model).
DISK 9 - Antenna Utilities 4
Three programs that compute mismatch loss in dB as a
function of voltage standing wave ratio (VSWR), calendars in
Phadean's popular Time Traveler program, and the value of
the error function ERF(x) for real arguments.
DISK 10 - Dipole Antennas 2
Two programs that compute the impedance and VSWR
characteristics of "fat" center-fed dipoles and base-fed
monopoles and Folded Dipoles.
-2- 03/92-A
DISK 11 - AsEasyAs Spreadsheet
Excellent shareware spreadsheet program provided at no
charge for 30-day evaluation. This program is very useful
for analyzing and plotting antenna data generated by other
programs. Even though Phadean's antenna programs include
integrated on-screen plotting as appropriate, the
spreadsheet provides yet another highly flexible analysis
and visualization tool. If you choose continue to use this
spreadsheet, you must register with its manufacturer.
Phadean has no relationship with AsEasyAs' developer and
derives no income from its distribution.
DISK 12 - Draft Choice
A powerful shareware CAD program distributed by the
same company that developed AsEasyAs (DISK 11). This
program is very useful for designing antennas. It's a full-
featured CAD program that provides very impressive
capabilities at nominal cost. If you choose continue to use
this program, you must register with its manufacturer.
Phadean has no relationship with Draft Choice's developer
and derives no income from its distribution.
DISK 13 - Yagi Antenna Designs
Four programs that compute reflector, driven element,
and director lengths, diameters, and spacings for different
families of Yagi-Uda arrays (up to 40 elements). Output
files are created in a format that is input-compatible with
the modeling program YAGI_UDA.EXE (Disk 2) which computes
current distribution, input impedance, and radiation
patterns for Yagi arrays. A fifth program, BOOM.EXE,
computes element length correction factors for through-the-
boom insulated and uninsulated construction and for metal-to-
metal mounting of elements on top of the boom.
Disk 14 - Tower Array Pattern
Program to compute and plot the FCC "theoretical"
groundwave pattern for an array of base-fed tower (monopole)
radiators. The program allows any tower configuration and
any excitation (each tower excited separately). The
groundwave radiation pattern (field strength) is computed on
a perfect ground plane at a user-specified range. An output
data file is created for saving the pattern if desired.
This program is designed specifically for evaluating MF
broadcast station antennas, but it is useful in other
frequency ranges as well.
-3- 03/92-A
DISK 15 - Dipole Over Ground
Input impedance of center-fed dipoles over real, lossy
earth. Plots of Zin (R+jX) vs dipole length, element
radius, operating frequency, and height above ground.
Calculations are based on Method of Moments current solution
that accurately models non-sinusoidal source current.
-4- 03/92-A
P A Y O F F L O A N S O F T W A R E
PAYOFF is a powerful financial planning program for IBM
PC or PC-compatible DOS computers. It is designed for
individuals, businessmen, bankers, accountants, attorneys,
loan and mortgage originators, financial planners, or anyone
who needs to know:
- the cost of borrowing money
- the options available in doing so
- the details of how borrowed money is paid back.
PAYOFF tabulates detailed, payment-by-payment payback
(amortization) schedules for almost any conceivable type of
loan. The program is user-friendly and context-evident.
PAYOFF combines several useful features generally
unavailable in a single program.
In addition to standard direct reduction loan
schedules, PAYOFF computes repayment schedules with any
combination of variable interest rates, prenegotiated and/or
random skip payments (with or without payment of interest
only), and accelerated payments (additional amounts credited
toward principal). The program summarizes all user-supplied
input data in a convenient easy-to-read format, and it
tabulates a detailed repayment schedule, along with overall
amortization statistics, including interest saved (or
additional interest paid) and effective interest rate.
PAYOFF also includes prepaid interest calculation, days
before dates calculation, Rule of 7/8ths rebate, and
tabulated monthly payment for any combination of interest
rates and loan terms.
PAYOFF is one of the most powerful and flexible
financial analysis and planning tools available anywhere.
It is distributed on a single 5.25" or 3.5" IBM/DOS
diskette. PAYOFF costs $27.00 and can be ordered by mailing
your payment plus $3.00 Shipping & Handling within the
U.S.A. (add $1.00 for 3.5" diskette) to Phadean Engineering
Company, Inc., P. O. Box 611, Shrewsbury, MA 01545-8611
U.S.A. Tel. (508) 869-6077.
-5- 03/92-A
ANTENNA DESIGN/ANALYSIS and FINANCIAL ANALYSIS PROGRAMS
PRICE LIST (Effective Oct. 1, 1992)
Price Ea.
PAYOFF(tm) LOAN AMORTIZATION PROGRAM (described in Inc. Magazine,
September 1992, page 40): Complete loan analysis. $27.00
DISK 1 - Sloping Vee Antenna (3 pgms): optimum apex angle, input
resistance, and radiation patterns for SVs on real, lossy earth. $24.95
DISK 2 - Yagi Antenna (3 pgms): dimensions using NBS TN688, imped-
ance, current distribution, and rad patterns on real, lossy earth. $19.95
DISK 3 - Antenna Utilities 1 (3 pgms): mutual impedance of dipoles;
max communication range for smooth earth; max obstruction height. $13.95
DISK 4 - Antenna Utilities 2 (3 pgms): gamma match design and
performance; reflection coefficients for real, lossy earth; propagat-
ion const, impedance, other properties for wires above/below ground. $13.95
DISK 5 - Dipole Antennas 1 (3 pgms): current distribution (in-phase/
quadrature); impedance and admittance of center-fed dipole elements. $ 9.95
DISK 6 - Math Utils 1 (2 pgms): matrix inversion; lin systems Ax=B. $ 9.95
DISK 7 - Math Utils 2 (2 pgms): spline interp/plots; exp integral. $ 9.95
DISK 8 - Antenna Utilities 3 (3 pgms): Log-Periodic Array dimen-
sions; broadband radiator Z-loading profile; hand-held antennas. $13.95
DISK 9 - Antenna Utilities 4 (3 pgms): mismatch loss vs SWR;
Time Traveler (tm) time management program; error function. $ 9.95
DISK 10 - Dipole Antennas 2 (2 pgms): impedance and VSWR "fat"
dipoles/monopoles; folded dipole impedance. $13.95
DISK 11 - AsEasyAs: excellent shareware spreadsheet. N/C*
DISK 12 - Draft Choice: excellent shareware CAD program. N/C*
DISK 13 - Yagi Antenna Designs (5 pgms): families of Yagis (up to 40
elements); length corrections for different construction techniques. $19.95
DISK 14 - Tower Array Pattern (1 pgm): FCC "theoretical" groundwave
pattern for base-fed tower array. $29.95
DISK 15 - Dipoles Over Ground (1 pgm): Impedance properties of cen-
ter fed dipole antennas over real, lossy earth. $19.95
* Available only with orders of $25.00 or more; add S&H per diskette
shown below.
** S&H: $3.00/diskette to destinations in North America; $5.00 to Europe;
$6.50 elsewhere worldwide.
MAIL ORDERS MUST BE PREPAID.