[sdiy] Vox continental - one other thing...

[Mike]

> Sorry, there's one other question I've got about the Continental.
>
> Why do the OC71 germanium transistors have *four* legs?!
>
> http://www.electricdruid.com/continental.gif
>
> It looks like a basic transistor flip flop, but I don't get the four-
> legged transistors drawn as a black box. What's going on?
>

My first though was a mis-labelling and that it was something like an
AF114 - they had a fourth 'screening' lead, (and are famous for failing due
to 'whiskering', but that is another story). OC71's have 3 legs. I did work
on the Vox connies in my studenty days, and they were all standard
transistors, as I recall. I think the 10K's may be connected to the base, as
part of the weird bias arrangment. Is the 250 Ohm slider one of the voice
controls ? - I seem to remember having to make something to replace one
once, though I'm not sure.

Hope this helps

Mike