[AMPS] Re: parasites coexisting with oscillation?

[Jon Ogden]

>> He insisted that the oscillator could not have a parasite
>> simultaneously and still work on the designed frequency. I said it could,
>> that it could be simultaneously be making "non-harmonic" energy that could
>> break things, or created uneven heating and hot spots. Also arcs around the
>> tube and output electrodes. Does anyone have evidence to refute such
>> advice? That an oscillator can, by nature, only work on one frequency at a
>> time?And I don't mean XTAL oscillators but LC circuits and tubes.

I would find it unlikely that an oscillator would oscillate at two 
different frequencies, however, it isn't impossible.  Just as an 
amplifier can have parasitic inductance and capacitance due to lead 
lengths, component placement, etc. so could a similar thing happen in an 
oscillator circuit.  An oscillator will oscillate at a frequency 
determined by the resonance of the LC network (a XTAL oscillator works 
EXACTLY the same with with the LC network being replaced by the XTAL).  
However, if parasitic L's and C's exist that are not seen by the 
fundamental oscillator yet do create a resonant circuit at another 
frequency then it IS possible for a poorly designed oscillator to 
oscillate at 2 different frequencies.

73,

Jon
KE9NA


-------------------------------------
Jon Ogden
KE9NA

http://www.qsl.net/ke9na


"A life lived in fear is a life half lived."




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