Page 56 - Build Your Own Transistor Radios a Hobbyists Guide to High-Performance and Low-Powered Radio Circuits
P. 56
FIGURE 3-27 Oscillator coil, IF transformer, or adjustable coil/inductor.
It was found that some intermediate-frequency (IF) transformers can be converted
into oscillator coils by chipping off their internal capacitors. Hacking IF transformers
into oscillator or RF coils can be very useful because the inductances of IF
transformers and their turns ratios make them ideal in some cases (e.g., for a
low-power superheterodyne radio) (Figure 3-28).
