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# introduce the principle of 45W FM transmitter valve

2016-04-07 12:41
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This article is introduce the principle of 45W FM  transmitter  valve. The circuit is simple but effective. For you to better grasp the principle, the proposed combination of text to read the schematic. The technical characteristics of this circuit are:
Trends in catering: 220 v AC
In FM transmitter frequency: 88 ~ 108 mhz
Force Cost: Max 45 w (no R3),
In the circuit: We adjust the frequency of C2. We adapt the resistance with C1 antenna. Control (audio) can become from kasseto 'fwno or other powerful source. If it is a microphone to the amplifier so that it should first force in order to obtain a roughly 8 w.

 R1 15KW/2W R2 1KW/10W R3 1KW/10W (for biggest force in the exit you replace with short-circuit). C1 50pF trimmer C2 30pF trimmer C3 22pF/4KV C4, c6, c9 10nF/1KV C5, c7 1nF/1KV C8 100mF 100mF/450V (Double electrolytic) C9, c10 10nF RFC1, rfc2, rfc3 air Inductors: 15 coils diameter 8mm, from wire 1mm. T1 Transformer 220V/6V-1A T2 Transformer of configuration with being first 4 or 8W T3 Inductor with core ferrite (externally it resembles with small transformer but has a turn only). D1 BY127 rectifier Lamp 807 SYLV USA or EL34 or equivalent ANTENNA Simple dipole L/2. (L= wave length) S1 Main switch of catering. S2 Switch of catering of rise (him we close after zestacej’ the thread).

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