>
>>What is the usual method of measuring the series resonance of a plate
>>choke?
>
>Well, what I have seen done and suggested is to short the ends of the
>choke together and measure the resonance with a dip meter. This is how I
>measure mine.
>
This is how I do it. Resonances typically move about when the choke is
installed. so, I measure resonances with the choke in place, connected
to the anode circuitry and the choke not shorted with a clip-lead. If
there is a dip within 6% or so of an operating freq., I remove turns to
move the problematic resonance to a safe parking area a bit higher in
freq. // Note: If the choke winding is coated with urethane varnish
after assembly to hold the windings in place, it reduces choke winding
vibration during SSB modulation, and it makes removal of turns much
easier.
Rich. Measures. Web site: www.vcnet.com/measures
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