>In message <F2B87FD6828AD11196F100A0C9410EC2617D73@excalibur.swindon.msl
>.mitel.com>, Peter Chadwick <Peter_Chadwick@mitel.com> writes
>>
>>2. just because there's a VHF resonance doesn't mean that there will be a
>>parasitic oscillation. There has to be feedback and gain.
>>
>
>And, if there's a parasitic oscillation, it doesn't mean there is a
>resonance (or that the oscillation is occurring at any resonant
>frequency if there is one).
>
>All it needs is the load on the active device to have the necessary
>magnitude and phase (resistive and reactive components). It's more
>likely to happen at a resonant frequency because the phase spins around
>a lot and you are more likely to hit the angle for oscillation.
>
>Steve
>
>PS talking of puns, I think someone mentioned the 'grate' parasitic
>debate - perhaps a reference to how it seems to grate on some people?
>
Indeed, Steve. The debate consisted of a great number of words. The
words certainly grated on some people -- especially on the fiercely loyal
pack of 'rauchschnauzers'.
cheers
Rich...
R. L. Measures, 805-386-3734, AG6K
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|