Full-size 600 ohm telo transformers

Eric Smith spacewar at gmail.com
Tue Nov 11 18:23:26 CST 2014

Chuck Guzis wrote:
> I've got a bunch (maybe half a dozen) 600 ohm - to -600 ohm telco line
> transformers.  Nice units, maybe 5 inches tall by 2.5 inches wide, and
> potted.  Use 4 8/32 screws for mounting.
> Is there any use for this stuff?  Does anyone want them?

JC White wrote:
> Perhaps useful to amateur radio operators like myself...

Speaking of which, a friend has a bunch of Tellabs 4201 2-wire to
4-wire hybrids ("Terminating Sets") that he'd like to sell. Maybe
useful to hams? They are switchable for 600 or 900 ohms on the 2-wire
side, and fixed at 600 ohms on the 4-wire side. each module has two
potted transformers, four test jacks, and an edge connector to plug
into a backplane.

Photos: https://www.flickr.com/photos/22368471@N04/sets/72157649241740522/

A scan of the tech manual is at:

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