[sdiy] multi legged electro caps?

[Scott Gravenhorst]

mark verbos <mverbos at earthlink.net> wrote:
>I'm trying to repair an old lab oscillator. It's a General Radio 2c-2MC
>
>The frequency is not stable so I'm guessing it's the power supply  
>caps. Looking at these things, the biggest one has 7 pins. It's  
>labelled Mallory COE-74  235 6534K
>
>300  150
>150  150
>150  150
>
>Is this a part I can find? Is it multiple caps in one can? What's the  
>deal here?

Showing my advanced age, I know of these and as a youngster I used to scavange them
out of TV and radio sets put out on the curb on trash day.  

Yes, this is several caps in one can. There may or may not be common internal
connections, often the negative terminals of the internal caps share a common
terminal.  The ones I used were usually about an inch or so in diameter and 2 to 3
or so inches long.  Often there were a letter marks on the plastic disk at the
bottom, the letters were also stamped into the case as a legend to relate the MFDs
that corresponded to each internal cap.

I'm sure you know you could DIY manufacture a suitable set of caps out of modern
parts as long as you respect the voltage and uF values.

-- ScottG

---------------------------------------------------------

-- Scott Gravenhorst
-- Xilinx Spartan-3E Based Music Synthesizers
-- FatMan: home1.gte.net/res0658s/fatman/
-- NonFatMan: home1.gte.net/res0658s/electronics/