Radio Theory and design

For this test I wound a transformer matching the one I posted about earlier. It has 3500T : 500T. I expect it to perform similiar to this on...

I decided to see just how fuzzy the twang-a-matic is and here's the result.   The yellow trace is the input and the green is FUZZY! ...

Babani coil construction First I would strongly recommend this book. It doesn't go into a lot of high math just tables and charts and...

I was thinking I could use an audio oscillator and found some 3N58 SCS's in the bin. Relaxation oscillator are the simplest to build ...

  A TA7642 IC IS BASICALLY THE SAME DEVICE. EASIER TO FIND THESE DAYS.

If Xl = R  the inductance can be calculated. Doing this without DC will give the inductance of the coil to AC. Set the DC current you expec...

   In the article he calculates the headphone power to be 4 microwatts. The silver cell produces 0.7 Volts unloaded and drops to about 0.5 ...