Simple receiver 02
Électronique /
Electronic
Radio /
Radio
The coil
The coil is wound with 1,5mm solid copper wire (black) on a square strip of wood of 28x28 mm. The windings with a tap are pulled upwards a little and the isolation is removed..The antenna, source of the fet and the short from the top are connected to these taps with crocodile clips. The correct tap is determined experimentally by ear. There is also a tap on zero windings. This is located in the middle of the connection between the coil and the ground of the tuning capacitor.
| Band | Antenna tap | Source tap | Top tap | Tune (degrees) |
Sensitivity |
| 80 | 3 (2.5wdg) | 4 (4.5wdg) | 12 (35wdg) | 270 | 4 uV |
| 80 | 1 (0.5wdg) | 3 (2.5wdg) | 12 (35wdg) | 270 | 8 uV |
| 5.3 MHz | 3 (2.5wdg) | 4 (4.5wdg) | 12 (35wdg) | 365 | 4 uV |
| 5.3 MHz | 2 (1.5wdg) | 4 (4.5wdg) | 12 (35wdg) | 365 | 4 uV |
| 40 | 1 (0.5wdg) | 2 (1.5wdg) | 8 (19wdg) | 350 | 4 uV |
| 40 | 0 (wire) | 1 (0.5wdg) | 8 (19wdg) | 350 | 16 uV |
| 30 | 1 (0.5wdg) | 2 (1.5wdg) | 6 (11wdg) | 355 | 4 uV |
| 20 | 1 (0.5wdg) | 2 (1.5wdg) | 6 (11wdg) | 360+95 | 4 uV |
| 17 | 1 (0.5wdg) | 2 (1.5wdg) | 5 (7wdg) | 360+90 | 4 uV |
| 15 | 0 (wire) | 1 (0.5wdg) | 5 (7wdg) | 360+130 | 8 uV |
| 12 | 0 (wire) | 1 (0.5wdg) | 4 (4.5wdg) | 360+120 | 4 uV |
| 10 | 0 (wire) | 1 (0.5wdg) | 4 (4.5wdg) | 360+170 | 4 uV |
