>
>>>In order to achieve the optimal stagger-tuning effect for
>>>a vhf suppressor, roughly equal currents (at the anode resonant
>>>frequency) are needed in L-sup and R-sup. .
>>
>>Can you explain what you mean by 'stagger tuning' in this context, please,
>>and at what anode resonant frequency are equal currents needed in L-sup and
>>R-sup - and why?
>
>Rich believes that VHF RF currents at the frequency of anode resonance
>are always flowing, even in a stable amplifier. His view is in order to
>suppress these currents you must split them evenly between the inductor
>and the resistor.
>
? not quite. The damped-wave ringing (at the anode-resonant freq) only
exists when the anode current changes rapidly. This ringing occurs
whether or not regeneration takes place. Some 922 owners have reported
that keying or unkeying the T/R bias initiated what appeared to be a
full-blown parasite. // Since the potential that is developed across a
tuned ciruit is proportional to Q, lowering the Q of the anode resonant
circuit reduces the amplitude of the ringing. // The reason for
dividing the ringing currents between L-sup and R-sup is explained in
another reply on this thread.
- later, Jon
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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