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Old 5th Oct 2019, 3:01 pm   #3
TonyDuell
Dekatron
 
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 4,199
Default Re: 706 telephone conversion

What I do for 2-wire 706s and 746s is wire them exactly as in the appropriate N diagram (N806, N846) including the original line cord. I terminate that in a Block Terminal 52 (the original junction box) and fit a 3k3 resistor in place of the strap for the extension bell there (which puts that resistor in series with the 1k bell in the telephone). Then wire the 2 line wires to the appropriate terminals in the Block Terminal.

That is, wire as the N diagram, connect a 3k3 resistor between the white and green wires of the line cord and connect the line wires to the white and red wires of the line cord.

This has the advantage that the telephone is absolutely 'as original' inside.
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