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Old 19th Jul 2005, 10:39 am   #12
Biggles
Nonode
 
Join Date: Feb 2004
Location: Hexham, Northumberland, UK.
Posts: 2,234
Default Re: The BBC 1 Valver!

Hi all, did the mains superhet circuit use the 40 series valves? I can vaguely remember seeing this book at school (probably while other kids were playing football!) in the seventies already looking very old and tattered and would like to have a look at it again. Did it start off with a one valve circuit using a 6AU6 then gradually add on stages, till it ended with a mains superhet? It sounds like the same book. Can't remember which coils it used but I would imagine they were repanco or the like.

Biggles
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