BTW celebrating 36 years "legally" on the radio this weekend.
I blew the control grids out of my homebrew 4 813 amplifier by cranking the
power up too high to squeeze the last couple watts out. It still made power
but only about 1/4 as much.
I've only had a GRID TO CATHODE short on a 3-400 in my Drake L4 and I did it
at 15 years old by turning to transmit with the power turned all the way up.
A late at night accident, whoops $60 spent at Heathkit store to buy two new
3-500Z tubes
I've had a CATHODE weld failure on an 8877 and Eimac admitted to a run of
bad tubes and replaced it for free. 1979 code date.
I'd call that so far so good.
BOB DD
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Tom W8JI
Sent: Sunday, February 18, 2007 2:59 PM
To: TexasRF@aol.com; g3rzp@g3rzp.wanadoo.co.uk; amps@contesting.com
Subject: Re: [Amps] Switching PS for filaments?
> I'll get back to you in about 10 or 20 years and let you
> know if there have
> been any more filament failures.
Fair enough, and by the same token I'll let you know when I
have my first filament failure in a tube I'm using. :-)
73 Tom
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