Instead of using PC boards, dom-
estic transistor radios were
initially built the same way as valve receivers were – ie, with point-to-point
wiring. The transistors were also sometimes mounted in sockets, just like
Of course, today we look on such techniques as archaic and
totally unsuited to modern technology. Everything is now on PC boards and
point-to-point wiring is minimised if not eliminated altogether.
Valve radio receivers were traditionally built using a metal
chassis to which all the major components (eg, transformers, valve sockets,
tuning gang, etc) were attached. The wiring was all point-to-point which made
the assembly slow and expensive.
This is the fully-restored Admiral 5BW in its case. Also shown is the barrel nut that secures the dual volume/tone control assembly.
However, some manufacturers did start using PC boards in valve
radios in the late 1950s. We looked at one of these, the Healing 412E, back in
February 2001. Admiral, an American firm, also built valve radios with PC boards
in Australia but their technique was somewhat different to Healing’s.