RE: Galloping Ghost Transmitter
Crist,
I read with you.
The capacitor C10 is to prevent higher harmonics when the transmitter end stage is switched on and off each pulse.
Tau is 2k2 x 0,01 x10 e-6 and that seems to be too low (for Dutch standards).
5 tau is about -,11 msec equal to about 9 KHz. 4 kHz is max for us.
It will work but for European standards 1,1 msec would be better, so 0.1 uF. The value plays a role when you use the pulse generator for audio range frequencies above 5 kHz. Which can be done in the USA. For GG the value 0,1 uF will do also. All by estimation!!
The resistors 10 k base and 47 ohm emitter will result is some higher current and output of the oscillator. When the transmitter is finished it would be good to measure the voltage over the 47 ohm resistor, it indicates the current drawn by the transistor. The type of transistor maybe will be different as in the plans so we will see in the future but the values you use seems to be all right now.
Cees