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|Valve radio receiver|
|Written by Hans Summers|
|Saturday, 20 June 2009 15:41|
This one was a lot of fun. This valve receiver was constructed in 1988 in the traditional way, i.e. an aluminium front panel and chassis. A mains isolating transformer and rectifier was also required, this was built in a separate box to keep interference away from the radio. I discovered (perhaps unsurprisingly) that if you put the transformer next to the radio all you could hear was a nasty hum! The transformer is an old-fashioned 250V secondary valve power supply type, which also has a 6.3V winding for the valve heaters. (Click the photographs for larger versions).
Well, I learnt all about valves, or so I thought, and came up with this single valve design, which I showed to my Dad as he was the real expert on valve radios. He recommended a different design for many reasons, and I learnt a tremendous amount from our discussions about the improved design. My idea was as shown far right (below, click for larger image).
|Last Updated on Saturday, 20 June 2009 15:44|