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FREE RF DESIGN NOTES....FREE ANTENNA DESIGN NOTES...FREE ELECTRONIC DESIGN HINTS...FREE WHITE PAPERS..

• Ever wonder about wire gauge and resistance? Would you be surprised that AWG behaves like dB? See how it works at What does AWG mean?
• Need to figure out abount FCC Antenna Factors and how to calculate antenna factor from antenna gain?
• How about a Poor-Man's A/D Converter circuit?
• Need a way for Atmel to convert from Hex to Ascii?
• A GREAT collection of zipped Excel RF calculators sent to me....Active filters, Q, T-Lines, Couplers, Intermod, coils, group delay, waveguide, baluns, attentuators, detectors, filters, duplexers, etc.
  
• We'll add more...we're just getting started with the freebie stuff.
• If you have any good ap-notes, send me an e-mail.
  

Free VSWR, noise, power conversions...Pi and Tee Attenuator networks

http://www.spectrummicrowave.com/tools.asp
http://www.spectrummicrowave.com/cascade.asp
http://www.spectrummicrowave.com/vswr.asp

One of the best books on digital filters: http://ccrma-www.stanford.edu/~jos/filters/

Free filter design software: http://www.gwtsoft.com/

A Page with a lot of useful RF Links: http://www.circuitsage.com/tline.html