UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Biggles · 15th May 2019, 7:05 pm

If you fancy building a superhet I would just look at some domestic radio circuits of the era and modify the design to your own taste. Use an old scrap set for parts maybe? IF transformers are probably hardest to find, but the rest of the stuff can be had fairly easily. There was an excellent book called "Radio for Boys" by Bradley I think. This has all the info you need, including a mains valve superhet which I built and it works. Get the earlier version of the book as the later edition is transistor based. The addition of a BFO is probably a good idea if you want to listen to amateur transmissions. These can be added on without the complexity of product detectors, but obviously performance will be limited. All good fun particularly if you like a design challenge and experimenting a bit.
Alan.

15th May 2019, 7:05 pm	#5
Biggles Rest in Peace Join Date: Feb 2004 Location: Hexham, Northumberland, UK. Posts: 2,234	Re: Short Wave listening If you fancy building a superhet I would just look at some domestic radio circuits of the era and modify the design to your own taste. Use an old scrap set for parts maybe? IF transformers are probably hardest to find, but the rest of the stuff can be had fairly easily. There was an excellent book called "Radio for Boys" by Bradley I think. This has all the info you need, including a mains valve superhet which I built and it works. Get the earlier version of the book as the later edition is transistor based. The addition of a BFO is probably a good idea if you want to listen to amateur transmissions. These can be added on without the complexity of product detectors, but obviously performance will be limited. All good fun particularly if you like a design challenge and experimenting a bit. Alan.