Table 3.
Technical Data
| Type of coil | Rat Helmholtz | Rabbit Helmholtz | Rat cosine | Rabbit cosine |
|---|---|---|---|---|
| Outer diameter of tube (diameter of coil) | 5 cm | 12.8 cm | 7 cm | 12.8 cm |
| Inner diameter of tube | 4.5 cm | 12.2 | 6.4 cm | 12.2 cm |
| Length of coil | 5 cm | 11 cm | 10.5 cm | 7 cm |
| Diameter of half shell | 15.24 cm (6″) | 15.24 cm (6″) | 15.24 cm (6″) | 15.24 cm (6″) |
| Diameter of shielding | 10.3 cm | 14.3 cm | ||
| Shielding yes/no | No | No | Yes | Yes |
| Conductors | Copper foil | Copper foil | Copper rods and copper foil | Copper rods and copper foil |
| Range of tuning/matching capacitors | 2 pF–29 pF | 2 pF–29 pF | 2 pF–29 pF | 2 pF–29 pF |
| Number and value of distributed | 4 of 12.2 pF each | 4 of 8.2 pF, 4 of about 24 pF | ||
| Width of copper tape | 0.5 cm | 1.2 cm | 1.2 cm (endring) | 1.2 cm (endring) |
| Angles of tape placement | 30°, 150°, 210°, 330° | 30°, 150°, 210°, 330° | ||
| Number of rods | — | — | 26 | 26 |
| Number and value of serial capacitors | — | — | 2 of 16 pF each | 2 of 7.5 pF each |