One of the few advantages of being as old as dirt,is the knowledge that the world didn't spring into being full grown on January 1st 1980!
When I started my first job, at Atkins (WA) back in 1959,there were a number of companies who provided kits for RTV &H/EA projects.such as Q-Plus.RCS,& some lesser lights,
Back then,you could buy a complete kit to build a (black & white) TV set from Q-Plus,(& strangely,Philips).
RCS stuff was usually a bit less ambitious,being either short form kits,or small audio amps,etc.
You could also get short form kits for the RTV&H Playmaster amplifiers,but you had to buy the valves,transformers,etc separately.
University Graham produced a kit to build a Valve Tester--we had
one of those in stock!
Atkins also had a few Heathkits!
The advantage of being a WA company is that you could buy kits & stuff from many different suppliers,without being pushed one way or the other by "The Wise Men from the East".
At that time,there were 3 main Electronics suppliers in Perth,Atkins,A.J.Wyle, & Carlyles,who all sold the RCS & Q-Plus kits.
By 1965,when I left Atkins,the kit situation was pretty much dying,as people could buy cheaper than build,especially TV sets,so the market was disappearing.
Over the next few years, things changed fairly rapidly, with A.J.Wyle disappearing,Atkins & Carlyle merging,General Accessories appearing for a few years,with an initially successful Self Service business plan,then finally failing.
In the early 1970s the Electronics Supply situation was pretty barren,then Altronics opened,(initially as a Dick Smith agent),then in its own right.
Of course, DSE were going "gangbusters" in the Eastern States,but we didn't get one of his stores till later.
Kits were something you occasionally saw referred to in ads in EA.
In the late 1970s the CB Boom hit!-----Everybody had to sell CBs,Chemists,K Mart,Service Stations,you name it!!
Kits! What the hell are kits!!
Which pretty much bring us to the situation faced by Colin & others in the early '80s.
By the time Talking Electronics came out,I had been working in Electronics for nearly 20 years,& to be honest,it didn't do anything for me.
A lot of my younger workmates still bought the mag though,& obviously learned a lot from it.