Re: First Radio Build - 12V HT system
Re: Post#22, a 500pF variable capacitor will tune the MW band with a suitable coil, but not with the 5uH coil that's shown in the schematic, to get a graphical understanding of what's going on have a look at the nomograph in the picture below, draw a line between an inductance value and a capacitance value then read off the frequency scale the resonant frequency in kHz of that LC combination. In that pic micromicrofarads is the same as picofarads (pF)
Lawrence.
|