[HAM] Recapping

[Kon Zissis]

Hi David.
Thank you for explaining the correct terminology as well as some of the
differences between different wax impregnated capacitor brands.
 
>Why confuse the issue by creating terminology such as "plain cased  
>wax caps" vs. "cardboard covered"?
 
When I wrote "card board tube covered wax caps " I was referring to
those particular wax impregnated paper capacitors that specifically have
a stiff outer cardboard cover  similar to the stiff card board covered
C30 25 uf electrolytic capacitor of the percussion circuit in the AO28
preamp.
 
I believe that Scott Hawthorn was referring to the same  particular
types  wax paper capacitors that I was referring to when he used the
term ''cardboard covered''.  
 
Thus far I have only seen these types of capacitors on a 1937 BC organ ,
but Scott has seen them on 1964 organs so therefore I suspect that
Hammond used them  indiscriminately depending on what batches were
available at the time of their bulk purchase ordering from the various
vendors. 
 
The most common wax paper capacitor types that I have seen on most TG's
as well as in old amplifiers are those that have what I called the
"plain case" which is the normal paper roll that is impregnated with
wax. 
 
I used the term "plain cased" because I was not sure what the correct
term for these are as opposed to the wax caps that have the stiff outer
card board tube. 
 
I do not have any advanced electronics engineering training so therefore
I am not sure about the proper  correct terminology. I try to describe
these things in layman's terms that hopefully make sense to the reader.
 
Even though "wax caps" is not the technically correct term  , this is
the term that is commonly used on the Hammond forums so therefore I
would assume that most forum members would be well aware what is meant
by "wax caps" as opposed to "red mylar caps".
 
Yes the wax caps on each organ  did age differently in each organ as you
explained , however my unverified non scientific assumption is that the
wax caps that had the stiff outer cardboard tube cover might possibly
have suffered less moisture absorption related mfd value drift up
because the stiff outer cardboard tube  might have helped to act as a
barrier that to some extent helped lessen the moisture from getting in
as much as it did to the other more common wax caps that I referred to
as "plain cased".
All the best.
Kon.
 
 
David anderson wrote:
 
ALL commercial-grade impregnated paper capacitors were sealed in  
cardboard tubes, except for the types that were hermetically sealed  
in oil-filled metal containers of some sort. Perhaps some of the  
cardboard was colored on the outside. (In the early 60s, some  
capacitor manufacturers did start sealing paper capacitors in plastic  
like the mylar capacitors used on later TGs.)
 
Why confuse the issue by creating terminology such as "plain cased  
wax caps" vs. "cardboard covered"? "Wax caps" in and of itself is  
somewhat unproductive as a term because if you want to research them  
seriously, that's not what they were called. They were dipped in wax  
in an attempt to seal them against moisture. We might as well call  
716P polypropylene capacitors coated in orange epoxy resin "epoxy caps."