This is my attempt at a variometer crystal radio. I'm not going to waste a lot of your time on this, it does not work well. 2 stations + a mixed medley. Still, maybe there's a brave experimenter out there who can see how to make to work well. If so, go for it and let us know!
MATERIALS ========================
This is the variometer 3D printer files (print at 50% size):
www.thingivers...
Notes: This capacitor value for this radio is VERY fussy
Coil Outer: Dia: 43.615 mm, Turns: 36 = 18 x 2
Coil Inner: Dia: 35.76 mm, Turns: 32 = 16 x 2
- 330 pF capacitor
- Crystal earphone
- 10k to 40k ohm resistor
- 1n34a diode or D9K
Негізгі бет Ғылым және технология Crystal Radio--Variometer Type (4K)
Пікірлер: 11