Desk Stands, Connection of Sidetone Desk Stands to Common Battery AntiSidetone Subsets; A technical explanation.Note 1: Scan and commentary by Steph Kerman.

Desk Stands, Schematic for Early Common Battery Desk Stands with Single and Double Wire Transmitters.

Desk Stands, Schematic for Early Local Battery Desk Stands with Single and Double Wire Transmitters.

Provides by David M Willingham through www.classicrotaryphones.com/forum/

This is a diagram for connecting a sidetone desk stand, such as a 51-AL, to an anti-subset such as a 684A.

Note: This is *not* the more common NYT diagram, which has a limit of one station (no extensions) on the line, because of the permanently connected black condenser wire to the line.