ok.... one guy says use the "open circuit voltage" the other guy say use the
loaded "operating voltage" ..................who is correct
>From: "Phil Clements" <philc@texascellnet.com>
>To: "'Partain, Chuck'" <Chuck_Partain@maxtor.com>,<amps@contesting.com>
>Subject: Re: [Amps] tube impedance, figuring tank circuit values
>Date: Thu, 30 Mar 2006 16:20:27 -0600
>
>
> >
> > So, when I power up my amp, I see 3910vdc on my plate. The way I have it
> > configured, I put 330vdc on the screen grid
> > and -130volts on the control grid., when I bring the control grid to
>-69v,
> > the tube pulls current. The voltage on the plate is
> > dropping to ~3600 to 3700. Is this the value I would use to figure the
> > impedance of the tube for tank calculations?
>
>
>No, the voltage and current of the amp when it is running at what you plan
>to operate it at are the values that you plug into the formula. Say that
>the
>voltage drops to 3500 volts at an operating anode current of 1 amp; your
>tank should be configured for that, not the resting anode I.
>
>(((73)))
>Phil, K5PC
>
>
>
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