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ENGINEERING

Under this headline I have collected both engineering aids and descriptions of nice circuits to build yourself.

Helpful engineering tools

RF-resistance and skin depth of a circular conductor (25 kB). Calculate the RF-resistance and skin depth for different frequencies and materials with this Excel-sheet.

Frequency division and multiplication Excel-sheet (55 kB). Enter an oscillator or X-tal frequency and read the frequencies possible to derive by dividing and multiplying as well as mixing of two oscillators.

Transmission line reflection calculator. (25 kB). Calculate the various reflection parameters from your measurements with this Excel-sheet. I use it in my handheld computer/phone. Very handy. 

Resistance, reactance and resonance calculator. (25 kB). Calculate the various Ohm's law parameters, inductor and capacitor reactance as well as LC-resonance with this Excel-sheet. I use it in my handheld computer/phone. Very handy. I will update it with more functions. 

Parabolic dish calculation S/W for DOS-environment, Dish.exe (54 kB). Runs fine in an DOS-window in Windows 2000 and XP. NEW!!
The following features are included:

 Wave guide and coaxial structure parameter calculation S/W for DOS-environment, Cutoff.exe (75 kB). Runs fine in an DOS-window in Windows 2000 and XP. NEW!!
The following features are included:

 Smith-charts for the screen or to print on paper (A4 size) i PDF format. Standard B/W impedance Smith-chart (66 kB). Admittance and impedance Smith-chart in three colors (63 kB). NEW!!

Filter synthesis S/W for DOS-environment, Filter.exe (33kB). Synthesizes LP, HP, BP or BS filters with Butterworth, Chebyshev, Bessel or Gaussian (12 dB) characteristics. Swedish version. Words not very different from English, you will do just fine. Runs fine in an DOS-window in Windows 2000 and XP. NEW!!

Radio equipment building descriptions

Beacon ID with PIC 16F84. A simple and reliable circuit for an radio beacon ID using the inexpensive and simple PIC 16F84. Still to be implemented!

Make your own connectors to 7/8", 1 1/4" and 1 5/8" low loss coaxial cable. Drawings for the whole process of making your own Type N (F) connectors using a lathe. The base is to start with a standard four hole flange Type N (F) chassis mounted connector and then making an interface to the heavy cable. NEW!!

Radio operating notes

Performance Measurement. Learn more about how to check your VHF-UHF stations performance by using ground noise, cold sky and sun noise. This mostly applicable for the EME-station but can be used for tropo stations as well. Still to be fully implemented! NEW!!

Aircraft Scatter. Learn more about Aircraft Scatter (ACS). An propagation mode for VHF and up, independent of weather conditions. Still to be fully implemented!

Troposcatter. Make calculations on troposcatter paths by using the Excel-sheet of SM6MUY. 

A few other troposcatter links:  

http://www.qsl.net/oz1rh/troposcatter99/troposcatter99.htm

http://www.uksmg.org/tropo.htm

http://home.planet.nl/~alphe078/tropo.htm

http://www.mike-willis.com/Tutorial/troposcatter.htm

http://www.oz4vv.dk/index.php?option=com_content&task=view&id=15&Itemid=51

 

@ This page is under development and the links may not work as expected. Check again soon and they can be updated!

[Besöksräknare]

Updated October 6, 2006.              http://home.swipnet.se/2ingandlin/SM6FHZ