From the results of experiment for frequewncy around 5 MHz (5.2665MHz) L1 = L2 = 30 wrap 5 Koker wrap on the ferrite core diameter of 6 millim, C1 = 100 pf.IF amplifier includes Low Power Amplifier so that only need a small current, and a parallel load L1C1 as a band pass filter.
We know that the LC parallel a high impedance, while the bipolar transistor has a medium impedance. As such collector can not be connected directly to point A but ketitik B, That be located where the question point B?
There Rule of Thumb is: Called hot-end point A, point C is called the cold-end if the collector higher impedance point B must be closer to point A. And vice versa if the impedance collector more Low point B closer to point C.
We know that the impedance Z = V / I with a large or small impedance depends on the size of collector currents collector. The smaller the current higher impedance.
The amount of L2 that will roll into the amplifier input The next approximately 1 / 6 of the number of coils L2 and must rolled near point C cold-end.
No comments:
Post a Comment