Показать сообщение отдельно
  #364  
Старый 06.06.2019, 23:03
Аватар для yanik
yanik yanik вне форума
Senior Member
 
Регистрация: 29.07.2006
Адрес: new-york city
Сообщений: 4,071
Время Online: 3 d 4 h 32 m
2km TV Transmitter

Here is a simple TV transmitter. The circuit is simple and really quite crude, but it does include MONO sound. I have not shown the two regulators in the drawing. These are one 12v DC 1A series regulator chip, and one 8v DC 1A series regulator. I fed the 8v regulator from the output of the 12v regulator. The rest of the circuit looks like this. It is a free-running Variable Frequency Oscillator (VFO) using just one coil and one capacitor to determine the frequency. Change this as you will. The basic circuit uses a 150pf from the Base of the RF transistor to ground, so that TR2 operates as a "common-base mode" (grounded base) amplifier. The tuned circuit in the collector and the capacitor from collector to emitter provide tuning and feedback.

[Ссылки могут видеть только зарегистрированные пользователи]
__________________
."Я благословлю благословляющих тебя, а проклинающих тебя Я прокляну"(Берешит 12 Лех леха 3)
Ответить с цитированием