[R-390] Re: Caps and more caps

[N4BUQ at aol.com]

Well, if I still had the caps (they're residing in the landfill at the moment), I could send them to you.  But, then again, you might not believe I took them out of an R390A so it would be pointless.

While I've never met him, I'd like to think Walter is a friend of mine.

Barry(III) - N4BUQ

>What you and Walter have said violates the laws of statistics.  That is why
>I say I don't believe you.
>
>Are you and Walter friends?
>
>Dr. Dallas Lankford
>retired Professor of Mathematics and Statistics
>Louisiana Tech University
>
>----- Original Message -----
>From: <N4BUQ at aol.com>
>To: <r-390 at mailman.qth.net>
>Sent: Wednesday, January 12, 2005 7:29 AM
>Subject: Re: [R-390] Re: Caps and more caps
>
>
>> Again, I can only concur with Walter.  A large percentage of the "brown
>beauties" in my '56 Motorola had cracks that could easily be seen.  I don't
>think mine was abused, but just old.
>>
>> Barry(III) - N4BUQ
>>
>> >Walter,
>> >
>> >I do not believe you. The laws of statistics say that if 7out of 10 brown
>> >beauties were cracked (as you claim), then my friend and I would have
>> >observed several hundred cracked brown beauties. The odds of us seeing
>none
>> >(which is what we saw) are way beyond 1 in a trillion.
>> >
>> >Dr. Dallas Lankford
>> >retired Professor of Mathematics and Statistics
>> >Louisiana Tech University
>> >
>> >----- Original Message -----
>> >From: "Walter Wilson" <wewilson at knology.net>
>> >To: "Dallas Lankford" <dallas at bayou.com>; <R-390 at mailman.qth.net>
>> >Sent: Wednesday, January 12, 2005 5:04 AM
>> >Subject: Re: [R-390] Re: Caps and more caps
>> >
>> >
>> >> Dallas,
>> >> I keep a bag of old capacitors that I've removed from R-390As. I
>> >> randomly pulled 10 of the brown tubular ones out of the sack this
>> >> morning. I counted 7 of those with cracks. While it is certainly true
>> >> that not all capacitors need to be replaced, I'd err on the side of
>> >> replacing too many than too few, especially if it is filled with the
>> >> brown tubulars.
>> >>
>> >> Walter Wilson - KK4DF
>> >>
>> >> Dallas Lankford wrote:
>> >>
>> >> >Perhaps you are shopping at the wrong R-390A store, but it is far more
>> >> >likely that you are mistaken. I have carefully inspected and rebuilt
>> >> >between 10 and 20 R-390A's, and a good friend of mine has carefully
>> >> >inspected and rebuilt well over 100. Neither of us have ever found a
>bad
>> >> >(cracked or otherwise) brown encapsulated paper capacitor in an
>R-390A.
>> >> >
>> >> >
>> >>
>> >>
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