This program is intended as a basic primer for antenna and feedline design, and to act as a handy ready-reference source on antenna and related information. As can be seen from the menu (lines 220-370), the program covers the more common amateur antennas and, in the case of options A, B, D, E, G, H and I, the program will provide optimum dimensions, feed-point impedance, gain etc for the nominated frequency. Options C and F give further details for the design of Yagis and dipoles respectively. Option J gives dimensions and required capacitance for a Gamma Match at the nominated frequency. Option K allows for the calculation of the impedance of unmarked and unknown coaxial cable (such as the assorted lengths in the corner of your shack). Option L allows for the design, or checking, of open wire feeders to provide particular impedances. Option M gives coaxial cable data for some of the more common types used by amateurs. Option N is a Standard Wire Gauge table and finally, Option O is for frequency to wavelength, and vice-versa, conversion. All the above material is fairly standard and can be found in a variety of amateur antenna books thus, the program merely acts as an easy way of providing initial designs, dimensions, etc. In addition, if the formulae used in the program are not a particular individuals preferred ones, they can be simply changed. The program is written for the Amstrad CPC464, which uses Locomotive Basic (a variety of Microsoft Basic), it should therefore be easily converted to run on a range of the more popular home computers. If the thought of typing in the program (it is 19k long) is a bit daunting, I will be happy to make copies of it for any WIA members provided I am supplied with a blank tape or disc, a self-addressed suitable package to return it in and, of course, either pre-stamped or with sufficient funds to cover the postage costs. AR, WIA Amateur Radio Magazine
| ★ AMSTRAD CPC ★ DOWNLOAD ★ |
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CPCrulez[Content Management System] v8.732-desktop/c
Page créée en 163 millisecondes et consultée 349 foisL'Amstrad CPC est une machine 8 bits à base d'un Z80 à 4MHz. Le premier de la gamme fut le CPC 464 en 1984, équipé d'un lecteur de cassettes intégré il se plaçait en concurrent du Commodore C64 beaucoup plus compliqué à utiliser et plus cher. Ce fut un réel succès et sorti cette même années le CPC 664 équipé d'un lecteur de disquettes trois pouces intégré. Sa vie fut de courte durée puisqu'en 1985 il fut remplacé par le CPC 6128 qui était plus compact, plus soigné et surtout qui avait 128Ko de RAM au lieu de 64Ko. |
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