QEX is a bimonthly publication of advanced radio knowledge. (Quite honestly a lot of it is over my head).
http://edition.pagesuite-professional.co.uk/Launch.aspx?PBID=1025e13a-735b-4a99-8b09-149c006f5765 You would need to login with your ARRL credentials. I know the link is different, but it is legit. Just in case you are still skeptical, you can get there from this page as well. http://www.arrl.org/arrl-magazines
However, they have launched some university level Electrical Engineering essays to help increase knowledge for anyone interested. QEX will now be available as part of your ARRL subscription.
Essay 1: Introduction to QEX: The ARRL experimenters' Exchange
Essay 2: Setting up your home electrical engineering lab
Essay 3: EE math the easy way
Essay 4: Ohm's Law - Do you REALLY believe it?
Essay 5: Simultaneous Equations
Essay 6: Kirchoff's Voltage Law (KVL)
Essay 7: Kirchoff's Current Law (KCL)
Essay 8: The Maximum Power Transfer Theorem
Essay 9: Energy Storage and Recovery
Essay 10: Mechanics of Waves
Essay 11: Filters
Essay 12: Impendence Matching (Is that like a fashion thing? Does this toroid go with my feed line? I wanted to go with red, but they only had black left)
Essay 13: Introduction to Active Devices
Essay 14: Free Electrons and Plasmas
Essay 15: Introduction to Digital Techniques
Essay 16: Contrasting Combinational Logic and Sequential Logic
Essay 17: Digital Signal Processing
Summary and Wrap - Up
This will be produced by Eric P. Nichols, KL7AJ, a two-time recipient of the William Orr, W6SAI Technical Writing Award. He has written numerous articles for QST and QEX magazine as well as four ARRL books, the latest being "Receiving Antennas for the Radio Amateur." Eric's latest focus is on encouraging experimentation on our two new LF bands on 2200 meters and 30 meters, heroically attempting to make up for lost time in catching up with our LF brethren across the pond.