>
>
>-----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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