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#11
11-30-2009, 02:54 AM
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The Varicap version of the two schematics has a flaw. There should be a DC blocking cap there to isolate the DC Emitter voltage from the Varicap's cathode, along with its DC control voltage circuit. A 1000pF should work. Also, 1Meg for R5 seems a bit high too.
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__________________________________________________ ___________________________ Disclaimer: Any information that I post is intended for educational purposes only. No warranty or liability is expressed or implied. Note: Working with household line voltages (Mains) can be dangerous. Proceed at your own risk! 
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