>Rich:
>
> I am not well versed in the details of common transmitting tube
>construction. I have much better things to do with my (always limited) time
>than sawing apart toasted or otherwise abused power tubes.
Out of sight, out of mind.
- Sand, the last defense of ostriches.
>
> I believe I have presented a generic example of the macro Lorenz
>force
>in practice that can occur between two current carrying conductors. This is
>not an opinion - it is the LAW. Now if my model is not realistic, then it
>simply does not apply and it is of no value.
>
> If you believe that 42A DC
Who said this current was DC ?
>currents are flowing in ADJACENT PAIRS of
>conductors anywhere, anytime within a tube and anywhere near the
>parameters I
>have used in my analysis, then show me( even at 42A the force will be well
>under a gram) .
The 42A-rms of RF related only to your assertion about vaporizing a grid.
>
> By the way, if that 42A. (DC)
It is not DC. What did I say that gave you the impression that it was a
direct current?
> is flowing in the filament-grid circuit,
It does not flow there. It is an AC current between the anode and the
grounded grid.
>where is it coming from?
>
The 10pF capacitance from the grid to the anode and the AC potential at
the anode. AC anode V = 3800v-pk/2^0.5 = 2690V-rms. Since Xc =
64-ohms, I = 2690V/64-ohms = 42A-rms
>
Eric -- you used the term "voodoo parasitics". Mr. Rauch also uses this
term. Do you know Mr. Rauch?
>Eric von Valtier K8LV
>
>P.S. It just occurred to me that if the filament wire is actually a helix
>(only a moderately pitched one)
>the adjacent B field will be much more
>solenoidal than axial, which greatly reduces the Lorenz force on the adjacent
>current carrying conductor by a great deal - further diminishing the effect
>which you propose.
>
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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