I remember these times and was acquainted with some of those early Seattle area hackers-- hackers before the word was corrupted. I've suffered a stroke a while back and it hinders my recollection of names, but I have a lot of memories. I had a friend, Rodger Modeen, a Boeing engineer who took an interest in 'phone freaking' and was an acquaintance of the notorious 'Captain Crunch', the guy that found he could manipulate the phone system using the whistle from the cereal box to generate the 2600 cps tones.
He built tone generators and used one to court a gal from some South American country he eventually brought to the States and married. I had Jumped on the Altair Computer featured on the January 1975 cover of Popular Electronics and purchased an S100-based CPU. I had a Tarbell Disc controller and a dual 8" floppy drive. I had assembled the controller and memory boards, but something was wrong. Rodger was able to diagnose it, and I was off and running using CPM. One of Rodger's claims to fame was releasing a circuit for a telephone modem with the disclaimer "This is not meant to defame, defraud or defrock the Bell Telephone System, So Be it."
Another acquaintance was an engineer who worked at the base of the KOMO TV tower on Queen Anne Hill. He was heavy into the fledgling amateur computer scene.
Another hotbed of activity was some folks who worked at a South Seattle fire station. These, in fact, were the ones who took the circulating pirated source code and created the package that became the Seattle Computer product that Bill Gates purchased for $50,000, resold to IBM, and then seized himself as MSDOS.