As discussed last month, there is a choice of two
modules; one with plastic power output transistors (Version 1) or with TO-3 metal encapsulated output transistors (Version 2).
At this stage, it is likely that Version 2 will be available from all major kitset suppliers, while at least one supplier has indicated that they will be selling both versions.
Both modules are straightforward to assemble but the transistor mounting details differ considerably between the versions. Therefore, we'll begin by describing the assembly of parts common to both versions.