Mr. ____?: A 3-500Z grid to filament short can be produced by
exerting a lateral force of 10g for approx 50-seconds --- provided
that 5.8v is applied of he filament. There are a number of aircraft
that are capable of such, but few pilots.
Another method is a VHF parasitic oscillation whilst using a 3kV to
4kV anode supply that does not have a peak current limiting (glitch)
resistor in the HV+ lead or some means of grid-fusing.
On Jun 3, 2006, at 10:00 AM, Gudguyham@aol.com wrote:
> In a message dated 6/2/2006 5:47:24 PM Eastern Daylight Time,
> firstname.lastname@example.org writes:
> W7MOI purchased a new Henry 2K-4A. Nothing at all happened when he
> rotated the tune and load controls with zero drive. After almost 8-
> years of almost daily use, he announced that the 2k-4A was perfectly
> stable. Within a week, he heard a big bang and subsequently
> discovered that both 3-500Zs had grid-fil shorts.
> What caused the shorts? A Parasitic? Is that the only explanation?
R L MEASURES, AG6K. 805-386-3734
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