[Amps] FW: AMERITRON AL-1500 ????

[Michael Tope]

----- Original Message ----- 
From: "R.Measures" <r at somis.org>

> Not quite, Joe, just lots of rotten splatter.
> Few of us appreciate the current carrying ability of the 8877 grid.
> For example, at it's rated f-max of 250MHz, with a 4kV PS, the 8877's
> grid must be able to carry over 40 Amperes of current from the 10pF of
> C to the anode.
> (2670V-rms across 10pF @ 250MHz = 2670v / 65-ohms = 41.07A-rms)
>>

Rich,

You are making an apples to oranges comparison. The issue isn't the
current carrying capability of the 8877 grid, it is the power dissipation
of the grid. A capacitor has a power factor of ~0.0. Kinetic electrons
striking the grid are a different animal than displacement current
in a capacitor (e.g. charge moving back and forth in conductors).

73 de Mike, W4EF............................................................