Good luck with this one. I just tried it with an aleady dead 3-500Z (older
Eimac; no ceramic pin support) that had a "crooked" plate - the whole plate
assembly popped loose and is "floating" around the grid structure. Oh well -
nothing lost (too small for a lamp, anyway); it had worked for mny years
before failure; perhaps the differential expansion had already broken the spot
welds.
73,
Tom - WA2BPE
Ron wrote:
> Good luck as you have a tube that has seen some forces causing the anode
> to bend to one side.
> I had one and banged the tube to my hand to force the anode straight .
> It worked and the tube is in service!
> ---
> Ron
>
> yo9fzs wrote:
> >
> > Hi amp fellows,
> >
> > I have NIB 3-500Z Eimac tube, manufacturing date seems to be 9640,
> > as written on the envelope.
> >
> > The anode and the cathode/grid cylindrical assemblies are not perfectly
> > coaxial.
> > Looking at the anode bottom, the anode is closer to the grid for one
> > it's side
> > than the opposed one with about 3 mm, so the the distance between
> > the anode axis and grid/cathode axis, at the bottom part of the anode is
> >
> > to about 1.5 mm.
> >
> > This should affect the anode to grid/gnd breakdown voltage.
> > About a similar problem I have read in the RadCom (dec '98).
> >
> > Anyone having experience or using 3-500Z or ZG's with similar problem?
> >
> > Thanks,
> > 73's,
> > Traian
> >
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