629 
ie 
(4) For the large two-ply gauge of dimensions 40 oms. x 4 cms. x 1 cm., 
Gauge signal = 33.3 volts. 
Ratio Cable signal _ 10054 2 go. 
ee Gauge signal 505 5s Zz 
(2) For the medium two-ply gauge of dimensions 1" diameter and 4" in 
thickness, 
Gauge signal = 1.11 volts. 
Ratio Cable signal = 20054. =~ 0. 
Gauge signal dot’ =? a 
(3) For the miniature tvwo-ply gauge of dimensions $" in diameter and 
4" in thickness, 
Gauge signal = 0.28 volts. 
+o Cable signal _ .0054 : a7 
gists Gauge signal (opps) 7 BP 
If, as expected, the cable manufacturer can produce in bulk, "standard 
treatcd" cable, similar to the samples, the percentages given above will be 
reduced three-fold. 
CONCLUSIONS. 
The "standard treated" cable developed and referred to in this 
account appears to be highly satisfactory for use With both large and 
miniature gauges. These gauges are being produced at this Zstablishment 
together with piezo-electric recording equipment. 
The variation of capacity with frequency is negligible up to 
4 megacycle for this particular cable. Cable signal has been reduced to 
a reasonably small portion of the gauge signal. 
