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Old 24th Feb 2021, 10:42 am   #7
Keith's Avatar
Join Date: Jan 2003
Location: Tewkesbury, Gloucestershire, UK.
Posts: 600
Default Re: Adding external speaker to Wireless set 19

I drive the headphones output through a transformer from a defunct Philips domestic valve radio. This had a third winding that was originally used for the negative feedback arrangement. This gives approximately the right impedance match and provides ample volume in a small room from an 8 ohm speaker. I have also used a small mains transformer successfully - we're not looking for hi-fi, after all.
Keith Yates - G3XGW
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