Clive Sinclair wrote a nice book about early transistor radios. It was published in 1960 and contains schematics of contemporary transistor radios from Britain, the United States, Japan, and Germany. The book may be downloaded from archive.org in any of several ebook formats.
In a discussion on the Antique Radio Forum, one of the members, Retired Radio Man, found that his local library blocks access to archive.org (what are they thinking!) and he was unable to access the ebook. Somehow byan-roper.org has managed to escape being blocked by the net nanny at his public library, so, I'm hosting a copy here on my site for him and others who have trouble getting to archive.org:
Clive Sinclair ,Transistor Superhet Receivers, Bernards (Publishers) Ltd, London, 1960.