RADIOSPURS.COM
A link site to the various radiospurs helper sites. Try just browsing to get an idea who we are.
A summary
Ever designed and manufactured a FM transmitter. Oh sure that 1W pirate radio, no I mean a 20Kw beast, that is 20 x 1.5KW MOSFET transistors. When you have done that, I mean one that can brush off a short between the two dipole arms, that is when you can say "I have made a Tx". Here in these pages you may find some help in achieving that goal.
Nearly all these calculators were originally desktop api's, spreadsheets or card decks, written in a variety of programming languages for different operating systems. The original version has been re-written in C# NET as a web based ASP api.
The very first succesfull program I ever wrote was at uni is not here because all it did was add two 4 digit numbers. Paper tape input, paper tape output to a hugh "computer" with a small window, illuminated by a green light, that gave a view onto the memory. A grid of ferrite beads. A attempt to multiply two 4 digit numbers was a failure, the only result being a screaming banshee noise of a machine in an infinite loop.
Then came the doc and pos doc, again playing with card decks of Fortran for analysis of coupled lines, microstrip capacitors and inductors. A single mis punched card would result in a loss of the batch timeslot for that day.
Finally the first job, design, analysis of GaAs amplifiers for the new fangled TV satellites. An introduction to S parameters, cascade T analysis and optimisation via Gear, Simplex and pattern. Initially via telephone modem line to George. Then an onsite Vax 11/780, Fortran and the first introduction to C. C was used to write a circuit analysis and optimisation program that became so heavily used that a new Vax had to be purchased just for microwave circuit design using the newly released Les Besser COMPACT.
So it goes on more and more aps, PC based C, C+, C++, network based on parallel network machines.
A lot of this accummulation of knowledged has been released on this group web sites. Each dedicated to a particular top, like microwaves, combiners, filters, propagation, antennae.