[AMPS] tuning up a tetrode amp

[measures]

>
>I am almost embarassed to ask this. However, since my ego is inversely
>proportional to my waistline.........I have recently acquired a superb HB
>amp covering 160 to 10. Uses Dahl components in the PS, vac. variables in RF
>deck. built professionally by a EE (now SK, RIP). The tube is a single
>4cx1500. 

An A of a B?

>My questions is how the heck do you tune this up? 

1.   apply max. drive with the anode and screen supplies off.  
2.   adjust the grid bias V until you have almost zero grid-current.  Do 
not readjust the bias V to set Zero Signal Anode Current (ZSAC). 
3.  tune grid roller coil for best swr.  (neutralized amplifiers only)
4.  apply anode and screen potentials without drive.  Set 

 I have used
>triodes all of my life sans my TS-820/830 which use beam power pentodes in
>the final (2X 6146) but I just tune for max power on these. I have always
>avoided tetrodes mosly due to my ignorance of the tune up procedure.
>
>The amp has metering for screen I and E and also grid I and E as well as
>plate I and E. What is the value I need to watch? I assume that it is not
>safe to tune it like my 3-500zs which is usually just tuning for max power
>out with a string of dits at 60 wpm?
>
>Also, what is the going rate for a good 4cx1500 pull? I figure they are not
>too bad since the military used/uses them and they have been around longer
>than I have been alive.
>
>Lane
>Ku7i
>San Diego
>
>PS I am anxious to see how well my "new" Johnson Ranger will drive this!!!
>
>
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>

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