Yes, the voltage did have to be increased to maintain power output nearing
the end of tube life. Not too many hours left at that point but a good
indicator to get another tube ready. Better than a surprise at 3AM :>)
Jack, W6NF
On Sun, Dec 20, 2009 at 8:13 AM, Bill, W6WRT <dezrat1242@yahoo.com> wrote:
> ORIGINAL MESSAGE:
>
> On Sat, 19 Dec 2009 08:20:08 -0800, Jack Parker <vhfplus@gmail.com> wrote:
>
> >I experienced increases in
> >tube life of at least 50 percent based on comparisons to tube log records
> >when the tubes were installed and run at full voltage for the life of the
> >tube.
>
> REPLY:
>
> Later on in the tube's life, did you have to increase the heater voltage,
> or
> just leave it constant for the entire lifetime?
>
> 73, Bill W6WRT
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