RF-CAD Electronic Design Package Information

General: This software package consists of about 40 useful programs designed to assist the radio amateur or electronic engineer in the design of many common types of circuitry. It is a practical, mature package and has been in daily use for many years in a commercial design environment. Emphasis has been placed on ease of use. Wherever possible, the user is presented with menus of choices and examples of input data being requested. New user have very little trouble learning to utilize this package.

• Features:
• Menu-Style program selection
• Programs are user modifiable (full source provided)
• Numerous design types supported
• Some of the many circuit types supported:
• Filters (LC passive, Crystal, active)
• Inductor Design (Torroid, Solenoid, Straight, Straight wire)
• Matching Networks (L, Pi, stubs etc)
• Overtone crystal oscillators
• Microstrips
• Transmission Lines (coax, parallel, waveguide)
• Antennas (Yagi-Uda, helix, dish, horn, element scaling)
• Pi and Tee attenuators and matching pads
• Other Types of aids:
• Radio Path calculations
• FM modulation analysis
• Miscellaneous conversions (dB, Volts, mW, meters, inches, deg K, etc)
• Geostationary Satellite antenna pointing calculations
• Moon Tracking aids (for EME communications)
• Receiver noise figure calculations
• Spurious receiver response prediction
• Intermodulation Distortion calculations

• Hardware Requirements:
• IBM compatible PC
• at least one floppy disk drive (either 5.25" or 3.5")
• IBM BASICA, or Microsoft GWBASIC or QBASIC

Ordering Information:

        Package consists of one diskette (or CD, please specify) and a 30 page manual 

        Price is $39.95 ppd USA, non-US orders add $3.00 for Air Mail shipping 

        email for ordering info. Paypal payment only.

Please note: This software has not been updated in some time, so certain data

(e.g. satellite positions) may be obsolete. Since you are receiving the BASIC

source files however, you can update that info yourself.

Notes on running RFCAD under Windows XP

You can get into an MSDOS window from Win XP as follows:
Select START->AllPrograms->Accessories->CommandPrompt.
That will bring up an MSDOS window.
 
You will also need QBASIC on your system to run RFCAD.
Windows XP doesn't come with it built-in any more, so you need to
download it from Microsoft's web site. Just click
on the QBASIC link in the requirements section above.
That will download a file called "olddos.exe".
Execute olddos.exe in an empty directory (C:\temp\ for example)

and it will expand into a bunch of files.
Two of the files are QBASIC.EXE. and QBASIC.HLP.
Copy those two files into the C:\Windows\System32\ folder.

The other files in C:\temp are not needed.
 
Once QBASIC is installed, get into an MSDOS windows (as show above)
then go to your RFCAD directory (C:\RFCAD or wherever you put it).
and type:
QBASIC /RUN CADMENU

The rest should work as described in the manual.