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TRF
RADIOS Part 5
MORE RADIOS |
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AUGUSTIN 'S RADIOS - Continued: |
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| Augustin for Romania had kindly sent us some more photographs of his radio projects. He writes: "I built it in a larger matchbox, 79x55x34 mm. I'm very satisfied with this radio. I receive loud and clear 2 stations here during the day, but in the night I can pick up more. The schematic it's not mine. Here it is: http://www.mikroelektronika.co.yu/english/product/books/rrbook/chapter3/chapter3g.htm When I built it I found, I guess so, the ideal values for the components. For example, it is very important to use the 100nF capacitor from pin 6 to negative. Without this capacitor the amplifier oscillates. I have a small volume pot but I don't use it. I tuned the volume with the screwdriver at the highest value. If I turn more, the radio oscillates. So, the value of the pot is 50K instead of the 47K pot, I put a 27K resistor. It works perfectly like this. I also didn't use R4. I put just the 47nF capacitor. I have a slide switch to turn the radio on or off. Maybe someone wants to ask me something. I'll be glad to reply, here my email address:  Best wishes, Augustin
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THE HAC MODEL "T" TWIN TRANSISTOR RADIO KIT
The HAC company of East Grinstead,
Sussex, produced radio kits for home construction radio enthusiasts and
short wave listeners. The three transistor circuit is described above,
but Jake Haskell very kindly sent MDS975 photographs of his original
HAC Model "T" Twin Transistor short wave radio instruction booklet.
You can download the PDF file of the HAC Model "T" Twin Transistor Radio Kit instruction booklet HERE You will also need to have a PDF viewer, such as Adobe Reader, installed on your computer - but this is a simple matter. Visit http://www.adobe.com/ to download Adobe Reader. |
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To More Electronic Projects Visit the EVERYDAY AND PRACTICAL ELECTRONICS Website |
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