Re: Tek could be use as a synonym of Tech?
I wouldn't recognise "Tek" as an alternative for "Tech" although there is nothing to stop you from simply spelling it phonetically for a magazine title. Titles don't have to include real words.
As far as shortening "Tech" is concerned, it's already a shortened form of technology so I don't see how you're going to shorten it further, other than using "Tec" but that has the same issues as "Tek".
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.