[ARC5] Mystery Component Color Codes

[Richard Knoppow]

   The size of the cap will depend on its voltage and type. A high-K 
ceramic cap will be relatively small, that is their main virtue. Paper 
caps will be larger but 0.05 uF is not a particularly high value. Paper 
caps differ in physical size depending on the way they are made, 
voltage, kind of enclosure. Most old paper caps had lettered markings, 
some, particularly tubular plastic encased caps, had stripes. For 
instance the notorious Sprague "Bumble Bee" caps, actually Sprague Black 
Beauty caps and some other plastic caps. The color codes are shown in 
many military technical manuals.

On 3/17/2024 11:41 AM, J Mcvey via ARC5 wrote:
> 50,000 pf is .05 uf.  it would be a fairly good size cap. I',ve seen 
> .008 uf  tubular ceramic cap /400V were about an inch long.. However, 
> those had numeric values printed on them.
> The tiny ones had the painted markings. What is the function of the cap 
> in question? Should be a bypass or audio coupler at that value
> 
> On Sunday, March 17, 2024 at 11:27:17 AM EDT, releazer at earthlink.net 
> <releazer at earthlink.net> wrote:
> 
> 
> As for that tubular component I was wondering about, it would seem that 
> it matches the "RMA Color Code for Tubular Ceramic Dielectric 
> Capacitors" as described in TM11-630 dated November 1944.  The 
> Green-Black-Orange-Orange code would see to equate to 50X1000 
> micormicrofarads at 3% tolerance.
> 
> Wayne

-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998