Field phone and switchboard inter-operability

[Chris Suslowicz]

Originally Posted by maple_leaf_eh

The C42 radio had a handset that fed with WD1 phone wire to a junction box on the top tray. The remote had a thumb operated magneto on the handset which rattled a clacker in the junction box, and whoever was on radio watch could speak to the remote. I don't know if it had batteries or used the C42's power.

I think the remote handset is entirely passive, and powered from the J1 or J2 box in Wireless Harness 'B' (soft-skinned vehicles) or the equivalent in AFVs. (I must sort my library into some kind of order; I can't find the appropriate manuals at the moment.) The buzzer or other tone generator is in the J1 control box (from memory).

WD1 is identical to D10 cable. (D9 never made it into service, I can't remember exactly why, but suspect the insulation wasn't robust enough, and why D10 had a protective outer layer of Nylon over the PVC. The earlier telephone cables (D1 to D8) were a cloth-covered rubber insulated type, with wax (Ozokerite?) impregnated jacket. I've got the details somewhere.)

Chris.