I'm not sure what you mean here by mu.
mu is dVp/dVg. Gm is dIp/dVg and ra is dVp/dIp
so mu is Gm times ra.
So for any given screen voltage, you can figure the mu, because at a given grid
voltage, Va has increased or decreased (depending on phase) with control grid
voltage and you can then figure out the plate current. Likewise, you can fix
the screen volts and calculate the plate current at various points in the cycle
and then apply Chaffee analysis.
OK, it's long and messy but can be done by hand from the characteristic
curves......
73
Peter G3RZP
========================================
Message Received: May 05 2013, 09:38 PM
From: "Markku Oksanen" <markku.a.oksanen@kolumbus.fi>
To: "Carl" <km1h@jeremy.mv.com>, "g8on@fsmail.net" <g8on@fsmail.net>, "Ville
Lintervo" <villelintervo@hotmail.com>, "amps@contesting.com"
<amps@contesting.com>
Cc:
Subject: RE: [Amps] 4CX5000A in common grid circuit
Hi
I have all the components to build the grid supplies to fit the need, screen
to +1600 V if necessary.I know the DC operating conditions need to be about the
same no matter what the RF configuration is.
I would still hope to find the a way to calculate the power gain in GG.I have
a hard time finding the a way to translate tetrode (grid to screen grid) muu to
equivalent triode muu.Or perhaps this is a silly question.
Thanks
MarkkuWW1C
> From: km1h@jeremy.mv.com
> To: g8on@fsmail.net; villelintervo@hotmail.com; amps@contesting.com
> Date: Sun, 5 May 2013 09:41:01 -0400
> Subject: Re: [Amps] FW: 4CX5000A in common grid circuit
>
> That is a typical British understatement (-;
>
> But also typical of many European signals.
>
> Carl
>
>
>
>
> >
> > The G2DAF configuration has had, over many years, a very poor reputation
> > for producing broad signals.
> >
> > 73
> >
> > Peter G3RZP
> >
> > ========================================
> > Message Received: May 05 2013, 11:07 AM
> > From: "Ville Lintervo" <villelintervo@hotmail.com>
> > To: "amps@contesting.com" <amps@contesting.com>
> > Cc:
> > Subject: Re: [Amps] FW: 4CX5000A in common grid circuit
> >
> > Markku, Have you given a thought for g2daf -configuration tog serve your
> > purposes ? http://www.g4dmp.co.uk/g2daf-lin.pdfSM2CEW describes his
> > implementation with QBL5/3500 http://www.sm2cew.com/ampli.html Ville
> > oh1jd
> >
> >
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>
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