On Aug 25, 2005, at 4:52 AM, Roy Koeppe wrote:
> If...
>
> "Reactance at 1.8MHz = 3099 Ohms"
>
> Then,
>
> With 3 kv on the plates, circulating current through the choke winding
> and through the by pass cap is 1 amp?
With a 3kV anode supply, The peak change in anode potential is c.
2700v-pk 0.707 x 2700v = c. 1900V-rms, so the circulating current
through the HV-RFC is 1900v / 3099-ohms = 0.616A-rms
>
> You see, this is a useless parameter.
Not quite since the HV bypass C must be able to carry 0.616A at 1.8MHz
without overheating and igniting.
> Circulating current is limited by
> parallel resonances in the winding,
At 1.8MHz, with a typical Ham amplifier - I don't think so.
> which present a much higher
> effective resistance to the tank circuit.
>
> 73, Roy K6XK
>
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>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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