OT : old US Telephone hybrid ('Network' block)

David Griffith dgriffi at cs.csubak.edu
Tue Mar 29 16:04:08 CDT 2011

On Tue, 29 Mar 2011, Tony Duell wrote:

> The 425 network was not field rpeairiable, and I can see why. After
> bending up the tabs, I slid off the can to reveal the components in a
> particularlly evil potting compound. It's not hard, it's sticky, I can be
> scraped off (but I spent good quarter of an hour clenaing a screwdriver
> after this). It will soften with heat (in fact a hot air paint stripper
> gun wil lget it to drip off, but I was gettign the thing so hot that the
> plastic terminal board was softening too). No solvent I have tried will
> remove it.
> The BSP docuemtns simply call it an 'insulating medium' which is not much
> help :-).
> Has anyone ever repaired such a Network block and knows how to shift this
> stuff?

Here's a replacement for $20: 

David Griffith
dgriffi at cs.csubak.edu

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