[AMPS] RE: 8877 failures; thoriated tungsten vs. indirectly heated tubes

[measures@vc.net (Rich Measures)]

...snip...
>That's why W1AW (and anyone else) had problems with premature 8877 
>failures due to shorted grids around 1988-92. 

Mr. Erhorn:  Did you disassemble any of the out-of-warranty 8877s that 
failed in the W1AW amplifier prior to June, 1990? .  . 
thanks
Rich---

R. L. Measures, 805-386-3734, AG6K   


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