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Old July 3rd 09, 02:04 AM posted to rec.radio.amateur.boatanchors
MoiInAust MoiInAust is offline
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First recorded activity by RadioBanter: Aug 2008
Posts: 80
Default AR88 enthusiasts in Australia

OK Richard

I was typing my reply when your message arrived. AFAIK there are no
electrolytic caps in an AR88. The bathtubs have groups of 3 of varying (but
the same per tub) capacities, some 0.1, some 0.25 etc.

Even the main smoothing caps are paper. They are 4 mfd.

"Richard Knoppow" wrote in message
m...

"MoiInAust" wrote in message
...
Thanks Richard

But not only does it smell bad, it is positively dangerous! Believed to
be PCB oil which is carcinogenic. (BTW, they are not electrolytic but oil
filled paper caps). I have received comprehensive advice on disposing of
the leaky capacitors (should I say condensers?) safely and in accordance
with health regulations. They MUST not be just thrown into the gargbage.
I will be removing mine according to that advice. Either I will obtain
genuine replacements or I will have to do with tagstrips and indivdual
caps. Ouch! I know that's sacrilege but its the lesser of the two evils
if new 'originals' can't be found --- and by the way I may have found
them!


I was refering to bathtub electrolytics and electrical "leakage". If
these are oil-filled paper they may well contain PCBs. I don't know how
one disposes of these in Oz land but the oil is carcinogenic. This is one
reason high voltage transmitting capacitors are hard to find surplus.
Modern plastic caps are far better than the originals. If you can find
suitable terminal boards you can mount them so that they will not look out
of place. Oil filled paper caps were considered to be high performance and
long lived at the time. Of course, these are probably sixty years old so
that really is long lived. If the impregnant has leaked out, even
partially, the caps have probably changed in characteristics and should go
anyway.


--
Richard Knoppow
Los Angeles
WB6KBL