Service manual Sony FWD-42PV1A
Service manual for Sony FWD-42PV1A FLAT WIDE DISPLAY, REMOTE COMMANDER RM-980, SPEAKER SYSTEM SS-SP42FW.
Sony FWD-42PV1A service manual contents:
- service overview
- service mode and adjustment
- troubleshooting
- spare parts
- block diagram
Download Sony FWD-42PV1A service manual guide
74F13 mini bug transmitter
Take a look at this mini transmitter which can be used as a bug transmitter or for spy transmitter too. It uses a single IC 74F13, one coil, a capacitor, one trimmer, one resistor and ofcourse one electret mic. It is so easy to build and can give you a total coverage range of about 3 to 5 meters. You may want to use a small 100mW amplifier to give a little extend transmission range so you can spy from other location.
Please use only 74F13 because 74S13 and the other ones does not work in 88-108MHz range. As antenna you can use a copper wire (>=1mm diameter) and as power supply 4 x1.2 / min.1200mA acumulators which will work for at least 7 days. Use short terminal for components and a good pcb.
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FM radio amplifier 25W
A simple 25W fm radio amplifier used as a final stage for a 2.5W transmitter. I has a total gain of 10 dB and needs a 12V / 3A power supply. It is equiped with KT925W or BLY88, BLY89C. Use a very good headsink because this transistor get very hot 
Coils values:
L1 = L3 = 4 turns / 1.5mm / 8mm / 10mm long
L2 = 4 turns / 1mm/6mm/10mm long
L4 = 20 turns / 0.8mm / on 100Ω resistor
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