CO129-547-1 Wireless telegraph and telephone services 16-1-1934 - 26-1-1934 — Page 31

G. F. 22

Inside Sheet

INDENT No:-

Item

Quantity.

No.

31

HONG KONG

PAGE.:-

8

Estimated Cost in England.

Description of Articles.

Total.

Rate.

£. S.

d.

20

1

IMPEDANCE METER.

21

1

22

1

23

1

24

24

1

WAVEMETER, Type M.g. 1E, 10/100 metres, with indicato r, crystals, head telephones and calibration chart.

TOOL BOX complete with tools.

The following additional items: will be required for telephone operation:-

I

¦ SUBSIDIARY RECTIFIER RACK, comprising:-

a. Rectifier for modula to r grid

negarive consisting of two

U.6 valves to deliver 100

m/a.at 800 volts D. C.

b.Rectifier for ano de supply to check microphone to deliver 100 m/a. at 24 volts D. C.

Note: 350V. 3 Phase or 200V. single

phase 50 cycle supply.

MAIN MODULATOR UNIT compris- ing screened framework mounting the following apparatus:

a.Main Modulator with mountings

for four M. T.9L val ves.

b. Sub Modula to r with mounting

for one M.T.6B valve.

c.Sub Sub Modulator with moun t-

ing for one M.T.4B valve.

The Unit to be complete with modulation meter and necessary indicating instruments and all detail parts.

1

Carried Forward........

Remarks or references to specifications or special notes (if any)

on separate sheet.