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[AMPS] 8877 test results.??

To: <amps@contesting.com>
Subject: [AMPS] 8877 test results.??
From: 2@vc.net (measures)
Date: Fri, 15 Sep 2000 02:06:10 -0700
>
>
>-----Original Message-----
>From: measures <2@vc.net>
>To: Bill Aycock <baycock@hiwaay.net>; AMPS <amps@contesting.com>
To: <amps@contesting.com>
>Date: 15 September 2000 03:27
>Subject: Re: [AMPS] 8877 test results.??
>
>
>>
>>>
>>>I have seen several postings with the subject "8877 test results"- but no
>>>results.
>>
>>Positive leakage was 10uA at 4000v.  Negative leakage was 0uA at 6000v.
>>This is typical of gold sputtering.  Autopsy revealed one gold blister on
>>the lower part of the grid.  There were no bare patches of base metal on
>>the grid.   Most of the meltballs apparently landed on the anode
>>insulator.
>
>Why was the tube taken out of service - in what way had it stopped
>functioning?


the 8877 apparently was intermittently shorted the H V supply.  My guess 
is that the loose gold on the anode insulator was causing flashovers to 
the grid collett.  

later, Steve

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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