Home Circuits Amplifier 28W power RF Amplifier for FM Broadcast 88-108 MHz 2SC1946

28W power RF Amplifier for FM Broadcast 88-108 MHz 2SC1946

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2SC1946A__Amplifier

This RF Amplifier designed for FM broadcast using a single 2SC1946 VHF Power Transistor. This 10-30W RF amplifier circuit provides an appropriate power boost with an input of 1-3 watt. Tower are 30 meters high will send signal surrounding air should be around 15 km.

RF Amplifier Artwork
The layout of the 2SC1946 28 Watts FM broadcast RF amplifier has been created with sPRINT Layout v3.0. You can get a Shareware copy at: http://www.abacom.de. The pcb outline is 100 x 50 mm (width x height).

2SC1946 Microstrip PCB 28W power RF Amplifier for  FM Broadcast 88 108 MHz 2SC1946 transistor RF power amplifier circuit Fm transmitter Circuits Amplifier

2SC1946 Microstrip PCB Layout 595x298 28W power RF Amplifier for  FM Broadcast 88 108 MHz 2SC1946 transistor RF power amplifier circuit Fm transmitter Circuits Amplifier

2SC1946 Microstrip Layout Component 28W power RF Amplifier for  FM Broadcast 88 108 MHz 2SC1946 transistor RF power amplifier circuit Fm transmitter Circuits Amplifier

RF Amplifier Parts List
All component values are drawn on the .comp and .silklayer bitmaps, with the following exception(s);
all four (4) coils (in the lowpass filter section) are: 3.5 turns, 8 mm DIA., 1.2 mm CuL closewound i.e. no wirespacing.

Note:
CuL = magnetwire, enameled copper wire, insulated (rigid) copper wire e.t.c..
2 mm equals approx. to #12 A.W.G
1 mm equals approx. to #18 A.W.G
1.2 mm equals approx. to #17 A.W.G
0.8 mm equals approx. to #20 A.W.G
0.3 mm equals approx. to #28 A.W.G.)

  • all diameters are measured from the inside of the coils, i.e. ‘internal’ diameter.
  • make sure to mount the rf-transistor on a appropriate heatsink and use some thermal heatsink compound between the flange of the transistor and heatsink! (Thermal resistance heatsink at least 6°C/W.)

Source: http://www.3-mtr.info/shareware/Amplifier%2028Watt%20MicroStripline%20%282SC1946A%29/

10 COMMENTS

  1. Amb Case 2sc1946 28watts rf-

    Can the offset to its bare pcb?
    How to purchase in order to do this?
    What is its price?
    The procurement of the time?

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