[R-390] capacitor thread

[Cecil Acuff]

Bernie and Group,

        A quick check of the Subscribers list indicates that unfortunately 
Dallas appears to have parted company with the group....He is quite 
knowledgably but I guess he didn't want to listen to any of our noise about 
statistics and paper capacitors any longer....right or wrong.

Cecil...
----- Original Message ----- 
From: "Bernie Nicholson" <vk2abn at batemansbay.com>
To: <r-390 at mailman.qth.net>
Sent: Thursday, January 13, 2005 10:36 PM
Subject: [R-390] capacitor thread


Dallas you may not have found many cracked capacitors ,but I can assure you 
that if you had subjected the black tubular caps with colored stripes to a 
leakage test you may have been suprised , I snip one end of all this type 
and Meggar test with a 500v insulation tester and most are below 500K and 
some below 100K , the flat plastic yellow type in some IF strips are very 
good I havnt found any failed caps in the Stuart Warner & Capehart recievers 
but the teledyne and some motorola rx s with the black beauties as you 
people refer to them are certainly candidates for replacement ,and Something 
else I have noticed is that the Noise Floor is improved by replacing the 
leaky caps, lets face up to the fact CAPACITORS are not meant to be 
RESISTORS  and Having pretentions to GREATNESS and waving your Degrees  isnt 
going to change this fact , I have restored 22   R390A   receivers and 5 
R390  s, capacitors are problematic in lots of recievers , I know there is a 
tendency for people with tertiary qualifications to ride roughshod over us 
mere mortals without them BUT Dallas  hands on experience does count for 
something ,and Cecils experience is born out by mine , As you are aware 
dallas Statistics are funny things and can be doctored  especially by people 
like yourself  for your own ends ,your quallifications in mathmatics dont 
cut much ice with me ON A RADIO SITE , I dont know why you would mention 
them ,Are you CRAVING  CREDABILITY ?   For the record my background  was the 
SCHOOL OF HARD KNOCKS ,and I am self educated in the electronics field, and 
left school at 14 years ,I am now retired after 40 years in the workforce 
,and still enjoy electronics as a hobby , Kind Regards to everyone  Bernie 
N


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