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Old January 21st 07, 07:40 PM posted to rec.radio.amateur.homebrew
Jim Jim is offline
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Default Bad Colpitts osc Waveform

Well, offhand, I don't like the way the base is biased... That
transistor will be clamping on the negative voltage swing which probably
answers why the waveform is so poor.



If you make a voltage divider for the base voltage, the transistor
oscillato ought to give a better waveform.

Perhaps something like 27K from +12 VDC to the basen, and 9.1 K from base
to ground.

This should improve the waveform shape....


Jim Pennell
N6BIU


--

11:40 Pacific Time Zone
Jan 21 2007

International Time
19:40 UTC
21.01.2007


 
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