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

[Chuck Guzis]

On 29 Mar 2011 at 21:36, Tony Duell wrote:

> Has anyone ever repaired such a Network block and knows how to shift
> this stuff?

No, but it sounds like plain old pitch.  It's still used (I get brass 
instrument leadpipes pre-filled with the stuff for kink-less 
bending).

Apply heat, but not too aggressively--if it catches fire, the smoke 
is really nasty.  A heat gun on a low setting might do the trick.

--CHuck