Here's the info you requested.... It doesn't work. Built the circuit, and ran into many problems. First of all, the oscillator runs fine, and the first RF transformer seems Ok. Putting an oscilloscope to the secondary output of the transformer you get the second harmonic ( example: Crystal is 1.8 Mhz, and output of the 8 turn winding equals 3.6 Mhz. Putting that all aside and proceeding forward, the PA goes into run-a-way. It starts to act normal for just a microsecond, the goes into run-a-way drawing max current. Circuit looks good, but whatever or whomever created it, didn't spend enough time doing their homework. Suggestion: Move on to another project. Jim
Where did this circuit come from?
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I want more information about this circuit.
Here's the info you requested.... It doesn't work. Built the circuit, and ran into many problems. First of all, the oscillator runs fine, and the first RF transformer seems Ok. Putting an oscilloscope to the secondary output of the transformer you get the second harmonic ( example: Crystal is 1.8 Mhz, and output of the 8 turn winding equals 3.6 Mhz. Putting that all aside and proceeding forward, the PA goes into run-a-way. It starts to act normal for just a microsecond, the goes into run-a-way drawing max current. Circuit looks good, but whatever or whomever created it, didn't spend enough time doing their homework. Suggestion: Move on to another project. Jim
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