|
||
The first prototype, built in 1987. |
What is needed: enameled copper wire - cable tensors (optional) - a metal rod to coil the wire around it. Time and patience! |
|
The straight wire is pulled tough between the two cable tensors, and another wire is coiled around the same. |
The coil thus obtained is then coiled around a firm rod. |
|
Check that there are no shorts before mounting it. |
A mounting example. |
|
Pi-coil on a toroidal nucleus. Mounted on the experimental setup seen below. |
Two pi-coils. The larger one has an additional winding, the smaller has a ferrite core inside. |
|
A pi-coil with multiple core-wires. The large wire is iron, the thin white wire is insulated nickel-chrome. As well, two enamel copper wires of different AWG section are inside the winding. |
The two pi-coils shown above mounted on a rotary switch to obtain diverse configurations in experimental circuits. |
|
A setup for experimentation. The aluminum case contains the rotary switch depicted in the previous picture. |
A test instrument to play with the pi-coil built around a old Taylor Radio Frequency Generator with changed heart and face. |
|
The
|