Your tuning for a peak BUT not exceeding the tubes screen current rating.
The Load cap controls the amount of Isg once the Tune control is set for a
resonance indication on the screen meter. They interact a bit.
Tuning is very similar to a GG amp with both using a grid current as the
You can keep an eye on the grid current but its mainly to keep the drive to
a safe level. Since this is a modification has the grid circuit tuning been
optimized? If not do that first at low power.
----- Original Message -----
From: "Jim Brown" <email@example.com>
Sent: Saturday, May 22, 2010 1:22 PM
Subject: Re: [Amps] 4CX250B Ratings in Dentron Clipperton V
> On Fri, 21 May 2010 19:32:43 -0400, Roger wrote:
>>The screen is the most sensitive tuning indicator and particularly so at
>>the higher power settings.
> So if I watch the screen current, am I tuning for minimum?
> Do I need to watch grid current, or will that take care of itself if the
> screen current is right?
> Many thanks for all the great responses, both on and off list. Very
> Jim K9YC
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