[Heathkit] Tubular Ceramic Capacitor

[Carl]

> Steve -
>
> One caveat.  MOST of these tubular capacitors were for temperature 
> compensation....


And they have been absorbing moisture and changing value and TC over the 
decades. They are the bane of many Collins PTO's as well as other vintage 
gear.


>
> I didn't see what equipment this one is in, but if it IS for tempco a 
> plain disc ceramic or dipped
> mica may not be a satisfactory replacement, as these are typically NP0, or 
> zero tempco.

NPO is the most common and a few N-750 values can be found in the discs.

The days of tubular TC's of many groups from NPO to N-1200 are long gone 
unless its special order.

Carl
KM1H




> 73, Garey - K4OAH
> Glen Allen, VA
>
> Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
> <www.k4oah.com>
>
>
>
> Steve Sutfin wrote:
>> Hello to the list,
>>   Has anyone heard of these or know of a source? I need a 3.3pf/500v.
>
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