BGY33C 20 Watts FM broadcast (87,5-108MHz) broadband RF-amplifier


Resistors
(values in Ohms unless otherwise noted)

R1 = 270 / 0,5 Watts
R2 = 5k variable resistor, 10 mm diameter, horizontal (Piher) *


Capacitors

C1 = 27pF
C2 = 56pF
C3 = 56pF
C4 = 27pF
C5 = 47uF/25Volts
C6 = 100n
C7 = 100nF
C8 = 100nF
C9 = 100nF
C10 = 10nF
C11 = 100nF
C12 = 10nF


Semiconductor(s)

T1 = LM317 (TO-220 outline)
BGY33C (Philips)

Coils

FXC = VK200 choke (ferroxcube)


Misc.

J1, J2, J3 = wire link, 1 mm CuAg


Notes

(*) power output adjustment
CuAg = silver plated copper wire
(I)   make sure to mount the rf-module on a appropriate heatsink and use some thermal
      heatsink compound between the flange of the rf-module and the heatsink!
      (Thermal resistance heatsink at least 6°C/W.)
(II)  all parts are soldered directly on the toplayer of the pcb.
(III) make sure the wire links stay clear of the etched pcb coils!
      (approx. 5 mm in height above the pcb)

(See also the datasheet of the BGY33C module.)

(C)2005 Helix Inc. The Netherlands.

