12 feet of black braided nylon replacement cord, 3mm in size which is recommended for "Super Thick" or "Super Heavy" diameter (0.12"), depending on particular model, will work in such brands as RCA, Philco, GE, Airline, Silvertone, Westinghouse, Motorola and Zenith to name a few.
Braided nylon cord is perfect for radio dials and is
superior to twisted cord which can unravel and become frayed.
A dial cord is subject to friction whenever the set is tuned and must
therefore possess reasonable resistance to abrasion. Nylon cord performs excellently in this
respect.
A very important property for a dial drive cord is that it
have a high coefficient of friction.
This requires that the cord should not become smooth or slick during
use. The type of thread used for the
braid, the diameter of the strands and the method of braiding determine its
performance and life in this respect.
Should the cord ever become smooth or slick during use, coat the cord with violin rosin. Violin rosin is made in a block, built into a wooden holder. Simply drag the cord across the rosin block until it is well coated, then install the cord on the dial drive assembly of the radio.