On Sat, 12 Dec 2020 09:18:09 -0500, legg wrote:

On Sat, 12 Dec 2020 07:56:15 -0000 (UTC), "Don" wrote:

Phil Allison wrote:

the Callins is in an epoxy sealed container

Interesting, but it doesn't answer my question:

Why was the circuit designed to use a Callins in C7?

Danke,

If it was designed to use a Callins cap, then Callins
would show up on the schematic and BOM.

As it is, specifying a 6V electrolytic to filter a
6.2V reference is probably a mistake.

RL

Lytics usually have a pretty good overvoltage tolerance, and a little
leakage wouldn't do any harm in a power supply filter. It may have
failed by drying out over the years and been replaced by whatever was
handy.





--

John Larkin Highland Technology, Inc

The best designs are necessarily accidental.