Radio Theory and design

 This article is directed at shielding your coil but it also applies to placing it in proximity of metal objects. Transformers, other coils,...

I'm posting this for the brave at heart. I did one three plate using two sheets of plastic. Using square plastic I covered half the plas...

The coil inductance is determined by this formulas  The factor are length of winding and radius of the windings. K is found from a ...

  I have one of these that still works.  Mine uses a single 1-1/2 volt cell to light the neon lamp. The trannsistor has to oscillate to dr...

   The capacitors in the base circuit illustrate filtering using capacitive reactance vs frequency responce. The RF is shunted to ground th...

 

  Ok you make a former and put some wire on it then what? Find some strip material. Banding is good. Next time your at the lumber yard and ...