That's been my experience too. The defective tubes often take as much as 100
hours of operation before they start to show a problem.
Alan, W3BV
-----Original Message-----
From: Terry Gaiser <w6ru@lightspeed.net>
To: Phil Clements <philk5pc@tyler.net>; Steve Thompson
<amps@txrx.demon.co.uk>; amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: Monday, August 02, 1999 1:33 PM
Subject: Re: [AMPS] 8877 bad date codes
>
>The problem I observed is that they develop filament to cathode shorts ...
>sometimes during the warm-up cycle sometimes all the time after warm-up ...
>this shows up as idling plate current while in standby.
>Terry W6RU
>
>----- Original Message -----
>From: Phil Clements <philk5pc@tyler.net>
>To: Steve Thompson <amps@txrx.demon.co.uk>; <amps@contesting.com>
>Sent: Monday, August 02, 1999 8:53 AM
>Subject: Re: [AMPS] 8877 bad date codes
>
>
>>
>>
>> >How do problems with these tubes show up when you use them?
>> >
>> >Steve
>>
>>
>> They will fail in a relatively short time.
>>
>> (((73)))
>> Phil, K5PC
>>
>>
>>
>> --
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>>
>
>
>
>--
>FAQ on WWW: http://www.contesting.com/ampfaq.html
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>
>
--
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Problems: owner-amps@contesting.com
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