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.
Reprinted Url Of This Article: