Published:2011-7-22 6:06:00 Author:Sue | Keyword: High-low Frequency, Signal Generator | From:SeekIC
The high-low frequency signal generator shown in the picture can generate low frequency of 1kHz, intermediate frequency of 465kHz and high frequency of 525-1605 kHz, which will help a lot in repairing and debugging radio or other circuit. It is good for beginners to make. Transistor VT1-VT3 can choose high frequency silicon tube with low power like 3DGI00,3DG201. fT>100MHz. The value of β is between 50 to 100. C7 can use 7/270pF radio with one connection or single connection capacitor of the double connection capacitor. The oscillation transformer T can be reformed on the radio. On the core, we can use 0.08mm high strength enamelled wire to wind L1 100 turns and L2 35 turns.
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